Twin cities
Encyclopedia
Twin cities are a special case of two cities
City
A city is a relatively large and permanent settlement. Although there is no agreement on how a city is distinguished from a town within general English language meanings, many cities have a particular administrative, legal, or historical status based on local law.For example, in the U.S...

 or urban centres which are founded in close geographic proximity and then grow into each other over time. The term Twin Cities in the United States refers specifically to the cities Minneapolis and Saint Paul
Saint Paul, Minnesota
Saint Paul is the capital and second-most populous city of the U.S. state of Minnesota. The city lies mostly on the east bank of the Mississippi River in the area surrounding its point of confluence with the Minnesota River, and adjoins Minneapolis, the state's largest city...

, both of which are in the midwestern state of Minnesota
Minnesota
Minnesota is a U.S. state located in the Midwestern United States. The twelfth largest state of the U.S., it is the twenty-first most populous, with 5.3 million residents. Minnesota was carved out of the eastern half of the Minnesota Territory and admitted to the Union as the thirty-second state...

.

Cities twinned geographically do not necessarily match demographically, economically, or politically.

In most cases, cities that grow into each other's space in this way lose their individual identities, and whatever border or barrier still separates them becomes irrelevant as they fuse into one new city. One famous example of this is Budapest
Budapest
Budapest is the capital of Hungary. As the largest city of Hungary, it is the country's principal political, cultural, commercial, industrial, and transportation centre. In 2011, Budapest had 1,733,685 inhabitants, down from its 1989 peak of 2,113,645 due to suburbanization. The Budapest Commuter...

 in Hungary, which began as two settlements (Buda
Buda
For detailed information see: History of Buda CastleBuda is the western part of the Hungarian capital Budapest on the west bank of the Danube. The name Buda takes its name from the name of Bleda the Hun ruler, whose name is also Buda in Hungarian.Buda comprises about one-third of Budapest's...

 and Pest
Pest (city)
Pest is the eastern, mostly flat part of Budapest, Hungary, comprising about two thirds of the city's territory. It is divided from Buda, the other part of Budapest, by the Danube River. Among its most notable parts are the Inner City, including the Hungarian Parliament, Heroes' Square and...

) facing each other across the Danube
Danube
The Danube is a river in the Central Europe and the Europe's second longest river after the Volga. It is classified as an international waterway....

 at a strategic fording place
Ford (crossing)
A ford is a shallow place with good footing where a river or stream may be crossed by wading or in a vehicle. A ford is mostly a natural phenomenon, in contrast to a low water crossing, which is an artificial bridge that allows crossing a river or stream when water is low.The names of many towns...

 along a trade route. However, there are twin cities which have been able to resist this final union and have maintained individual identity against the tides of history, economics and demographics.

Twin cities often share an airport, into whose airport codes
IATA airport code
An IATA airport code, also known an IATA location identifier, IATA station code or simply a location identifier, is a three-letter code designating many airports around the world, defined by the International Air Transport Association...

 are integrated the initials of both cities; DFW
Dallas-Fort Worth International Airport
Dallas/Fort Worth International Airport is located between the cities of Dallas and Fort Worth, Texas, and is the busiest airport in the U.S. state of Texas...

 (Dallas-Fort Worth
Dallas–Fort Worth metroplex
The Dallas–Fort Worth–Arlington Metropolitan Statistical Area, a title designated by the U.S. Census as of 2003, encompasses 12 counties within the U.S. state of Texas. The area is divided into two metropolitan divisions: Dallas–Plano–Irving and Fort Worth–Arlington. Residents of the area...

), MSP
Minneapolis-Saint Paul International Airport
Minneapolis-Saint Paul International Airport is the largest and busiest airport in the five-state upper Midwest region of Minnesota, Iowa, South Dakota, North Dakota, and Wisconsin.-Overview:...

 (Minneapolis-St. Paul), and RDU
Raleigh-Durham International Airport
Raleigh-Durham International Airport is a public international airport located 4.5 miles northeast of the town of Morrisville in suburban Wake County, North Carolina, United States. The airport covers and operates three runways, providing direct service to 40 domestic and international...

 (Raleigh-Durham) are examples.

In some cases, such as Albury
Albury, New South Wales
Albury is a major regional city in New South Wales, Australia, located on the Hume Highway on the northern side of the Murray River. It is located wholly within the boundaries of the City of Albury Local Government Area...

/Wodonga
Wodonga, Victoria
Wodonga is a small city on the Victorian side of the border with New South Wales, north-east of Melbourne, Australia. Adjacent to Wodonga across the border is the New South Wales city of Albury. Wodonga is located wholly within the boundaries of the City of Wodonga LGA...

 in Australia, the two cities are permanently divided by a state border, often one that strictly adheres to a geographical landmark, such as the Murray River
Murray River
The Murray River is Australia's longest river. At in length, the Murray rises in the Australian Alps, draining the western side of Australia's highest mountains and, for most of its length, meanders across Australia's inland plains, forming the border between New South Wales and Victoria as it...

 that divides New South Wales
New South Wales
New South Wales is a state of :Australia, located in the east of the country. It is bordered by Queensland, Victoria and South Australia to the north, south and west respectively. To the east, the state is bordered by the Tasman Sea, which forms part of the Pacific Ocean. New South Wales...

 from Victoria
Victoria (Australia)
Victoria is the second most populous state in Australia. Geographically the smallest mainland state, Victoria is bordered by New South Wales, South Australia, and Tasmania on Boundary Islet to the north, west and south respectively....

, and thus Albury from Wodonga.

Examples


Asia

  • Chiang Mai
    Chiang Mai Province
    Chiang Mai is the second-largest province of Thailand, located in the north of the country. Neighboring provinces are Chiang Rai, Lampang, Lamphun, Tak, and Mae Hong Son. In the north it borders Shan State of Burma...

     and Lamphun
    Lamphun Province
    Lamphun is one of the northern provinces of Thailand. Neighboring provinces are Chiang Mai, Lampang and Tak.-Geography:Lamphun is located in the river valley of the Ping River, surrounded by mountain chains....

    , Thailand
  • Guangzhou
    Guangzhou
    Guangzhou , known historically as Canton or Kwangchow, is the capital and largest city of the Guangdong province in the People's Republic of China. Located in southern China on the Pearl River, about north-northwest of Hong Kong, Guangzhou is a key national transportation hub and trading port...

     and Foshan
    Foshan
    Foshan is a city in central Guangdong province in southern China. The prefectural area under the city's jurisdiction over an area of about 3,840 km² and a population of 5.4 million of which 1.1 million reside in the city proper ....

    , People's Republic of China
  • Songkhla
    Songkhla
    Songkhla is a city in the Songkhla Province of southern Thailand, near the border with Malaysia. As of 2006 it had a population of 75,048...

     and Hatyai, Thailand
  • Hong Kong
    Hong Kong
    Hong Kong is one of two Special Administrative Regions of the People's Republic of China , the other being Macau. A city-state situated on China's south coast and enclosed by the Pearl River Delta and South China Sea, it is renowned for its expansive skyline and deep natural harbour...

     and Shenzhen
    Shenzhen
    Shenzhen is a major city in the south of Southern China's Guangdong Province, situated immediately north of Hong Kong. The area became China's first—and one of the most successful—Special Economic Zones...

    , People's Republic of China
  • Macau
    Macau
    Macau , also spelled Macao , is, along with Hong Kong, one of the two special administrative regions of the People's Republic of China...

     and Zhuhai
    Zhuhai
    Zhuhai is a prefecture-level city on the southern coast of Guangdong province in the People's Republic of China. Located in the Pearl River Delta, Zhuhai borders Jiangmen to the northwest, Zhongshan to the north, and Macau to the south. Zhuhai was one of the original Special Economic Zones...

    , People's Republic of China
  • Bangkok
    Bangkok
    Bangkok is the capital and largest urban area city in Thailand. It is known in Thai as Krung Thep Maha Nakhon or simply Krung Thep , meaning "city of angels." The full name of Bangkok is Krung Thep Mahanakhon Amon Rattanakosin Mahintharayutthaya Mahadilok Phop Noppharat Ratchathani Burirom...

     and Nonthaburi
    Nonthaburi Province
    Nonthaburi is one of the central provinces of Thailand. Neighboring provinces are Phra Nakhon Si Ayutthaya, Pathum Thani, Bangkok and Nakhon Pathom....

    , Thailand
  • Ramallah
    Ramallah
    Ramallah is a Palestinian city in the central West Bank located 10 kilometers north of Jerusalem, adjacent to al-Bireh. It currently serves as the de facto administrative capital of the Palestinian National Authority...

     and al-Bireh
    Al-Bireh
    al-Bireh or el-Bira is a Palestinian city adjacent to Ramallah in the central West Bank, north of Jerusalem. It is situated on the central ridge running through the West Bank and is above sea level, covering an area of...

    , in the West Bank
    West Bank
    The West Bank ) of the Jordan River is the landlocked geographical eastern part of the Palestinian territories located in Western Asia. To the west, north, and south, the West Bank shares borders with the state of Israel. To the east, across the Jordan River, lies the Hashemite Kingdom of Jordan...

  • Seoul
    Seoul
    Seoul , officially the Seoul Special City, is the capital and largest metropolis of South Korea. A megacity with a population of over 10 million, it is the largest city proper in the OECD developed world...

     and Incheon
    Incheon
    The Incheon Metropolitan City is located in northwestern South Korea. The city was home to just 4,700 people when Jemulpo port was built in 1883. Today 2.76 million people live in the city, making it Korea’s third most populous city after Seoul and Busan Metropolitan City...

    , South Korea
  • Tel Aviv
    Tel Aviv
    Tel Aviv , officially Tel Aviv-Yafo , is the second most populous city in Israel, with a population of 404,400 on a land area of . The city is located on the Israeli Mediterranean coastline in west-central Israel. It is the largest and most populous city in the metropolitan area of Gush Dan, with...

     and Jaffa
    Jaffa
    Jaffa is an ancient port city believed to be one of the oldest in the world. Jaffa was incorporated with Tel Aviv creating the city of Tel Aviv-Yafo, Israel. Jaffa is famous for its association with the biblical story of the prophet Jonah.-Etymology:...

    , Israel
  • Taipei
    Taipei
    Taipei City is the capital of the Republic of China and the central city of the largest metropolitan area of Taiwan. Situated at the northern tip of the island, Taipei is located on the Tamsui River, and is about 25 km southwest of Keelung, its port on the Pacific Ocean...

     and New Taipei, Republic of China (Taiwan)
  • Islamabad
    Islamabad
    Islamabad is the capital of Pakistan and the tenth largest city in the country. Located within the Islamabad Capital Territory , the population of the city has grown from 100,000 in 1951 to 1.7 million in 2011...

     and Rawalpindi
    Rawalpindi
    Rawalpindi , locally known as Pindi, is a city in the Pothohar region of Pakistan near Pakistan's capital city of Islamabad, in the province of Punjab. Rawalpindi is the fourth largest city in Pakistan after Karachi, Lahore and Faisalabad...

    , Pakistan
  • Jhelum
    Jhelum
    Jhelum or Jehlum may refer to:* Jhelum, a city in Pakistan on the banks of the Jhelum River* Jhelum District, an administrative division in Punjab, Pakistan surrounding the city of Jhelum...

     and Sarai Alamgir
    Sarai Alamgir
    Sarai Alamgir Sarai Alamgir (Urdu: سرائے عالمگیر) Sarai Alamgir (Urdu: سرائے عالمگیر) (pop. 175, 288 (as per DCR 1998) is the chief town of the tehsil of the same name. It is part of Gujrat district in the north of Punjab province. The town is located on the eastern bank of the Jhelum River...

    , Pakistan
  • Dhaka
    Dhaka
    Dhaka is the capital of Bangladesh and the principal city of Dhaka Division. Dhaka is a megacity and one of the major cities of South Asia. Located on the banks of the Buriganga River, Dhaka, along with its metropolitan area, had a population of over 15 million in 2010, making it the largest city...

     and Gazipur
    Gazipur, Dhaka Division
    Gazipur is a town located within the Gazipur Sadar sub-district of Gazipur District in the Dhaka Division of Bangladesh.Gazipur consists of 9 wards and 31 mahallas with an area of 49.32 km²...

    , Bangladesh
  • Dipolog and Dapitan, Philippines
  • Johor Bahru
    Johor Bahru
    Johor Bahru is the capital city of Johor in southern Malaysia. Johor Bahru is the southernmost city of the Eurasian mainland...

    , Malaysia and Singapore
    Singapore
    Singapore , officially the Republic of Singapore, is a Southeast Asian city-state off the southern tip of the Malay Peninsula, north of the equator. An island country made up of 63 islands, it is separated from Malaysia by the Straits of Johor to its north and from Indonesia's Riau Islands by the...

  • Dammam
    Dammam
    Dammam is the capital of the Eastern Province of Saudi Arabia, the most oil-rich region in the world. The judicial and administrative bodies of the province and several government departments are located in the city. Dammam is the largest city in the Eastern Province and third largest in Saudi...

     and Khobar
    Khobar
    Khobar is a large city located in the Eastern Province of the Kingdom of Saudi Arabia on the Persian Gulf. It has a population of 360,000 and forms part of the greater Dammam metropolitan area along with Dhahran, which together have a combined population of over two million...

    , Saudi Arabia

India

  • Ahmedabad
    Ahmedabad
    Ahmedabad also known as Karnavati is the largest city in Gujarat, India. It is the former capital of Gujarat and is also the judicial capital of Gujarat as the Gujarat High Court has its seat in Ahmedabad...

     and Gandhinagar, Gujarat, are looked upon as merging into a new twin city in-the-process.
  • Hyderabad and Secunderabad
    Secunderabad
    Secunderabad popularly known as the twin city of Hyderabad is located in the Indian state of Andhra Pradesh north of Hyderabad. Named after Sikandar Jah, the third Nizam of the Asaf Jahi dynasty, Secunderabad was founded in 1806 AD as a British cantonment...

    , Andhra Pradesh
  • Surat
    Surat
    Surat , also known as Suryapur, is the commercial capital city of the Indian state of Gujarat. Surat is India's Eighth most populous city and Ninth-most populous urban agglomeration. It is also administrative capital of Surat district and one of the fastest growing cities in India. The city proper...

     and Navsari
    Navsari
    Navsari is a city and municipality in the Surat Metropolitan Region and also the administrative headquarters Navsari District of Gujarat, India. Navsari is also the Twin City of Surat, and only 37 km south of Surat.-Geography:...

    , Gujarat, are in the process of merging and will be completed by 2015.
  • Sangli
    Sangli
    Sangli is a city in the state of Maharashtra of India. Sangli is known as the Turmeric city for its vast production of Turmeric. Sangli is situated on the banks of river Krishna and is the largest market place for Turmeric in Asia and houses many sugar factories, which it is also noted for...

     and Miraj
    Miraj
    Miraj , is an historic town in southern Maharashtra, India. The history of the town dates back to the early 10th century, and the town is known for its rich tradition of Hindustani classical music and for religious harmony. It served as a stronghold and a strategic bastion because of its location...

  • Udhana
    Udhana
    Udhna is a Sub-City of Surat. Located primarily on Surat-Navsari Highway in the Indian state of Gujarat. It is 7 km south of the Commercial Capital of Gujarat i.e Surat. Udhna is a Major Railway Station in Western India. Udhna is one of India's largest Textile manufacturing city...

     and Sachin, Gujarat
    Sachin, Gujarat
    Sachin is one of the major Industrial city in Surat Metropolitan Region in the Indian state of Gujarat. The town is located 11 km south of Udhana and 19 km from Surat on old Surat-Udhana-Mumbai highway. Sachin is also a Railway junction on Surat-Navsari line. The town is one of Asia's largest...

    , Gujarat, are one of the first Twin Cities in India
  • Kolkata
    Kolkata
    Kolkata , formerly known as Calcutta, is the capital of the Indian state of West Bengal. Located on the east bank of the Hooghly River, it was the commercial capital of East India...

     and Howrah, West Bengal
  • Ernakulam
    Ernakulam
    Ernakulam refers to the downtown area or the western part of the mainland of Kochi city in Kerala, India. The city is the most urban part of Kochi and has lent its name to the Ernakulam district. Ernakulam is called the commercial capital of the state of Kerala and is a main nerve of business in...

    /Kochi and Thrissur
    Thrissur
    This article is about the city in India. For the district, see Thrissur district. For the urban agglomeration area of Thrissur see Thrissur Metropolitan Area...

    , Kerala, now are in the process of merging and will be completed by 2020.
  • Bhubaneswar
    Bhubaneswar
    Bhubaneswar is the capital of the Indian state of Orissa, officially Odisha. The city has a long history of over 2000 years starting with Chedi dynasty who had Sisupalgarh near present-day Bhubaneswar as their capital...

     and Cuttack
    Cuttack
    Cuttack is the former capital of the state of Orissa, India. It is the headquarters of Cuttack district and is located about 20 km to the north east of Bhubaneswar, the capital of Orissa. The name of the city is an anglicised form of Kataka that literally means The Fort, a reference to the...

    , Orissa
  • Hubli and Dharwad
    Dharwad
    Dharwad, also known as Dharwar, is a city and a DISTRICT PLACE in India's Karnataka state.Dharwad is the administrative seat of the Dharwad District. The municipality of Hubli-Dharwad covers an area of 200.23 km²...

    , Karnataka
  • Mumbai
    Mumbai
    Mumbai , formerly known as Bombay in English, is the capital of the Indian state of Maharashtra. It is the most populous city in India, and the fourth most populous city in the world, with a total metropolitan area population of approximately 20.5 million...

    , Navi Mumbai
    Navi Mumbai
    Navi Mumbai is a Planned Satellite City on the west coast of the Indian state of Maharashtra. It was developed in 1972 as a twin city of Mumbai, and is the largest planned city on the planet, with under the jurisdiction of the Navi Mumbai Municipal Corporation and a total area of . Navi Mumbai...

     and Thane
    Thane
    Thane , is a city in Maharashtra, India, part of the Mumbai Metropolitan Region, northeastern suburb of Mumbai at the head of the Thane Creek. It is the administrative headquarters of Thane district. On 16 April 1853, G.I.P...

    , Maharashtra
  • Tirunelveli
    Tirunelveli
    Tirunelveli , also known as Nellai , and historically as Tinnevelly, is a city in the Indian state of Tamil Nadu. It is the headquarters of the Tirunelveli District and the sixth biggest city in Tamil Nadu...

     and Palayamkottai
    Palayamkottai
    Palayamkottai , known as the "Oxford of South India", is a town in the Tirunelveli district of Tamil Nadu. It is part of the Tirunelveli city corporation. It is on the eastern bank of the Thamirabarani river, while its twin city Tirunelveli is on the western bank.-Etymology:The archaic word Palayam...

    , Tamil Nadu
  • Pune
    Pune
    Pune , is the eighth largest metropolis in India, the second largest in the state of Maharashtra after Mumbai, and the largest city in the Western Ghats. Once the centre of power of the Maratha Empire, it is situated 560 metres above sea level on the Deccan plateau at the confluence of the Mula ...

     and Pimpri-Chinchwad
    Pimpri-Chinchwad
    Pimpri-Chinchwad is a city in the Pune district in the state of Maharashtra, India. It consists of the twin towns of Pimpri and Chinchwad which are governed by a common municipal body...

    , Maharashtra
  • Mandla
    Mandla
    -Demographics: India census, Mandla had a population of 45,907. Males constitute 51% of the population and females 49%. Mandla has an average literacy rate of 77%, higher than the national average of 59.5%: male literacy is 82%, and female literacy is 72%. Majority of Population belongs Adivasi, so...

     and Balaghat
    Balaghat
    Balaghat is a city and a municipality in Balaghat district in the state of Madhya Pradesh, India. It is the administrative headquarters of Balaghat District. The town was originally called "Burha" or "Boora", but this name was replaced by "Balaghat", which was originally the name of the district...

    , Madhya Pradesh
  • Chandigarh
    Chandigarh
    Chandigarh is a union territory of India that serves as the capital of two states, Haryana and Punjab. The name Chandigarh translates as "The Fort of Chandi". The name is from an ancient temple called Chandi Mandir, devoted to the Hindu goddess Chandi, in the city...

     and Mohali
    Mohali
    Mohali is a city adjacent to Chandigarh, 18th District in Punjab, India. It is officially named after the eldest son of Guru Gobind Singh, Sahibzada Ajit Singh . It, along with Chandigarh and Panchkula, form a part of the Chandigarh Tricity...

    , Punjab

Europe

  • stoke-on-trent (england) and Erlangen
    Erlangen
    Erlangen is a Middle Franconian city in Bavaria, Germany. It is located at the confluence of the river Regnitz and its large tributary, the Untere Schwabach.Erlangen has more than 100,000 inhabitants....

     (germany)
  • Bielsko
    Bielsko
    Bielsko was until 1950 an independent town situated in Cieszyn Silesia, Poland. In 1951 it was joined with Biała Krakowska to form the new town of Bielsko-Biała. Bielsko constitutes the western part of that town....

     and Biała
    Biała
    Biała is a Polish word for white. It appears in many Polish toponyms:-Towns:* Biała, also called Biała Prudnicka, in Opole Voivodeship* Biała Piska, in Warmian-Masurian Voivodeship* Biała Podlaska, in Lublin Voivodeship...

    , Poland
    Poland
    Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

  • Brighton and Hove, England
    England
    England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

  • Chatham and Rochester, England "it's a wise man who knows where Chatham ends and Rochester begins." Charles Dickens
    Charles Dickens
    Charles John Huffam Dickens was an English novelist, generally considered the greatest of the Victorian period. Dickens enjoyed a wider popularity and fame than had any previous author during his lifetime, and he remains popular, having been responsible for some of English literature's most iconic...

  • Manchester
    Manchester
    Manchester is a city and metropolitan borough in Greater Manchester, England. According to the Office for National Statistics, the 2010 mid-year population estimate for Manchester was 498,800. Manchester lies within one of the UK's largest metropolitan areas, the metropolitan county of Greater...

     and Salford
    City of Salford
    The City of Salford is a city and metropolitan borough of Greater Manchester, England. It is named after its largest settlement, Salford, but covers a far larger area which includes the towns of Eccles, Swinton-Pendlebury, Walkden and Irlam which apart from Irlam each have a population of over...

    , England
  • Leeds
    Leeds
    Leeds is a city and metropolitan borough in West Yorkshire, England. In 2001 Leeds' main urban subdivision had a population of 443,247, while the entire city has a population of 798,800 , making it the 30th-most populous city in the European Union.Leeds is the cultural, financial and commercial...

     and Bradford
    City of Bradford
    The City of Bradford is a local government district of West Yorkshire, England with the status of a city and metropolitan borough. It is named after its largest settlement, Bradford, but covers a far larger area which includes the towns of Keighley, Shipley, Bingley, Ilkley, Haworth, Silsden and...

    , England
  • Sheffield
    Sheffield
    Sheffield is a city and metropolitan borough of South Yorkshire, England. Its name derives from the River Sheaf, which runs through the city. Historically a part of the West Riding of Yorkshire, and with some of its southern suburbs annexed from Derbyshire, the city has grown from its largely...

     and Rotherham
    Rotherham
    Rotherham is a town in South Yorkshire, England. It lies on the River Don, at its confluence with the River Rother, between Sheffield and Doncaster. Rotherham, at from Sheffield City Centre, is surrounded by several smaller settlements, which together form the wider Metropolitan Borough of...

  • Copenhagen
    Copenhagen
    Copenhagen is the capital and largest city of Denmark, with an urban population of 1,199,224 and a metropolitan population of 1,930,260 . With the completion of the transnational Øresund Bridge in 2000, Copenhagen has become the centre of the increasingly integrating Øresund Region...

    , Denmark and Malmö
    Malmö
    Malmö , in the southernmost province of Scania, is the third most populous city in Sweden, after Stockholm and Gothenburg.Malmö is the seat of Malmö Municipality and the capital of Skåne County...

    , Sweden, often referred to as twin cities, as part of the Öresund Region
    Oresund Region
    The Øresund or Öresund Region is a transnational region in northern Europe, centred on the cities of Copenhagen and Malmö. Located by the shores of the Øresund strait and connected by the Oresund Bridge, the Capital Region of Denmark and Region Zealand constitute the Danish side, while Skåne...

    , divided by the Øresund strait.
  • Göteborg and Mölndal
    Mölndal
    Mölndal is a part of the Gothenburg urban area on the west-coast of Sweden, and constitutes the administrative centre of Mölndal Municipality. About 40,000 of the municipality's 60,000 inhabitants live here.-Geography:...

    , Sweden
  • Ludwigshafen and Mannheim
    Mannheim
    Mannheim is a city in southwestern Germany. With about 315,000 inhabitants, Mannheim is the second-largest city in the Bundesland of Baden-Württemberg, following the capital city of Stuttgart....

    , Germany
  • Ulm
    Ulm
    Ulm is a city in the federal German state of Baden-Württemberg, situated on the River Danube. The city, whose population is estimated at 120,000 , forms an urban district of its own and is the administrative seat of the Alb-Donau district. Ulm, founded around 850, is rich in history and...

     and Neu-Ulm
    Neu-Ulm
    Neu-Ulm is a town in Bavaria, capital of the Neu-Ulm district. Neighbouring towns include Ulm, Senden, Pfaffenhofen an der Roth, Holzheim, Nersingen and Elchingen. The population is 51,110 .-History:...

    , Germany
  • Mainz
    Mainz
    Mainz under the Holy Roman Empire, and previously was a Roman fort city which commanded the west bank of the Rhine and formed part of the northernmost frontier of the Roman Empire...

     and Wiesbaden
    Wiesbaden
    Wiesbaden is a city in southwest Germany and the capital of the federal state of Hesse. It has about 275,400 inhabitants, plus approximately 10,000 United States citizens...

    , Germany
  • Porsgrunn
    Porsgrunn
    is a town and municipality in Telemark county, Norway. It is part of the traditional region of Grenland. The administrative centre of the municipality is the town of Porsgrunn....

     and Skien
    Skien
    ' is a city and municipality in Telemark county, Norway. It is part of the traditional region of Grenland. The administrative centre of the municipality is the city of Skien. Skien is also the administrative centre of Telemark county....

    , Norway
  • Sandnes
    Sandnes
    is a city and municipality in Rogaland county, Norway. It is part of the region of Jæren.-History:Sandnes was separated from Høyland as a municipality of its own in 1860, and gained city status the same year...

     and Stavanger
    Stavanger
    Stavanger is a city and municipality in the county of Rogaland, Norway.Stavanger municipality has a population of 126,469. There are 197,852 people living in the Stavanger conurbation, making Stavanger the fourth largest city, but the third largest urban area, in Norway...

    , Norway
  • Fredrikstad
    Fredrikstad
    is a city and municipality in Østfold county, Norway. The administrative centre of the municipality is the city of Fredrikstad....

     and Sarpsborg
    Sarpsborg
    is a city and municipality in Østfold county, Norway. The administrative centre of the municipality is the city of Sarpsborg.Sarpsborg is part of the fifth largest urban area in Norway when paired with neighbouring Fredrikstad...

    , Norway
  • Gorizia
    Gorizia
    Gorizia is a town and comune in northeastern Italy, in the autonomous region of Friuli Venezia Giulia. It is located at the foot of the Julian Alps, bordering Slovenia. It is the capital of the Province of Gorizia, and it is a local center of tourism, industry, and commerce. Since 1947, a twin...

    , Italy and Nova Gorica
    Nova Gorica
    Nova Gorica ; 21,082 ; 31,000 ) is a town and a municipality in western Slovenia, on the border with Italy...

    , Slovenia
  • Gornja Radgona
    Gornja Radgona
    Gornja Radgona is one of the municipalities and a town in Slovenia. Once it was a defensive stronghold for today's regional centre and its twin city, Bad Radkersburg, on the other side of the river Mura in Austria. The towns were split in 1919 when the state of Styria was divided between Austria...

    , Slovenia and Bad Radkersburg
    Bad Radkersburg
    Bad Radkersburg is a city in the southeast of the Austrian state of Styria and capital of the district of Radkersburg. It is located at an elevation of 208 m and covers an area of 2.17 km². Its population amounts to about 1,940 people...

    , Austria
  • Buda
    Buda
    For detailed information see: History of Buda CastleBuda is the western part of the Hungarian capital Budapest on the west bank of the Danube. The name Buda takes its name from the name of Bleda the Hun ruler, whose name is also Buda in Hungarian.Buda comprises about one-third of Budapest's...

     and Pest, Hungary
  • Tornio
    Tornio
    Tornio is a town and municipality in Lapland, Finland. The municipality covers an area of of which is water. The population density is , with a total population of . It borders to the Swedish municipality of Haparanda...

    , Finland and Haparanda
    Haparanda
    Haparanda is a locality and the seat of Haparanda Municipality in Norrbotten County, Sweden with 4,778 inhabitants in 2005. It is adjacent to Tornio, Finland...

    , Sweden
  • Porto
    Porto
    Porto , also known as Oporto in English, is the second largest city in Portugal and one of the major urban areas in the Iberian Peninsula. Its administrative limits include a population of 237,559 inhabitants distributed within 15 civil parishes...

     and Vila Nova de Gaia
    Vila Nova de Gaia
    Vila Nova de Gaia, or simply Gaia is a city in Vila Nova de Gaia Municipality, Portugal. It is located in the Porto District, south of the city of Porto on the other side of the Douro River. The city proper has a population of 178,255 and the municipality contains 24 parishes with a total...

    , Portugal
  • Zgorzelec
    Zgorzelec
    Zgorzelec is a town in south-western Poland with 33,278 inhabitants . It lies in Lower Silesian Voivodeship . It is the seat of Zgorzelec County, and also of the smaller district of Gmina Zgorzelec...

    , Poland and Görlitz
    Görlitz
    Görlitz is a town in Germany. It is the easternmost town in the country, located on the Lusatian Neisse River in the Bundesland of Saxony. It is opposite the Polish town of Zgorzelec, which was a part of Görlitz until 1945. Historically, Görlitz was in the region of Upper Lusatia...

    , Germany
  • Těšín, Czech Republic and Cieszyn
    Cieszyn
    Cieszyn is a border-town and the seat of Cieszyn County, Silesian Voivodeship, southern Poland. It has 36,109 inhabitants . Cieszyn lies on the Olza River, a tributary of the Oder river, opposite Český Těšín....

    , Poland
  • Aalborg
    Aalborg
    -Transport:On the north side of the Limfjord is Nørresundby, which is connected to Aalborg by a road bridge Limfjordsbroen, an iron railway bridge Jernbanebroen over Limfjorden, as well as a motorway tunnel running under the Limfjord Limfjordstunnelen....

     and Nørresundby
    Nørresundby
    Nørresundby, a part of Aalborg Municipality, is a northern neighbourhood in Aalborg, north of the Limfjord, in Vendsyssel, in Denmark. The urban area has a population of 21,376 ....

    , Denmark
  • Alcobendas
    Alcobendas
    Alcobendas is a city located in the Community of Madrid, central Spain. It is located roughly 13 km north of Madrid and 7 km from the Barajas International Airport. It includes a central urban zone, a recently built district known as Valdelasfuentes, La Moraleja and El Soto de la...

     and San Sebastian de los Reyes
    San Sebastián de los Reyes
    San Sebastián de los Reyes is a municipality in the Community of Madrid in Spain. Founded in 1492, it is located 20 km north of Madrid. The city is twinned with Baunatal in Germany. It is geographically joined with neighboring Alcobendas and they share a common RENFE commuter line to Madrid Atocha...

     in Madrid, Spain
  • Valka
    Valka
    Valka is a town in northern Latvia, on the border with Estonia.Valka and the Estonian town Valga are twins, separated by the Estonian/Latvian border but using the slogan "One Town, Two States". The border dividing the Livonian town of Walk was marked out in 1920 by an international jury headed by...

    , Latvia and Valga, Estonia
  • Komárno
    Komárno
    Komárno is a town in Slovakia at the confluence of the Danube and the Váh rivers. Komárno was formed from part of a historical town in Hungary situated on both banks of the Danube. Following World War I, the border of the newly created Czechoslovakia cut the historical, unified town in half,...

    , Slovakia and Komárom
    Komárom
    Komárom is a city in Hungary on the right bank of the Danube in Komárom-Esztergom county.The city of Komárom was formerly a separate suburban village called...

    , Hungary
  • Newcastle-upon-Tyne and Gateshead, United Kingdom

North America

  • Minneapolis and Saint Paul, Minnesota
    Saint Paul, Minnesota
    Saint Paul is the capital and second-most populous city of the U.S. state of Minnesota. The city lies mostly on the east bank of the Mississippi River in the area surrounding its point of confluence with the Minnesota River, and adjoins Minneapolis, the state's largest city...

    , popularly known as the "Twin Cities" in North America
  • Montague and White Hall Michigan
  • Leominster, Massachusetts
    Leominster, Massachusetts
    Leominster is a city in Worcester County, Massachusetts, United States. It is the second-largest city in Worcester County, with a population of 40,759 at the 2010 census. Leominster is located north of Worcester and west of Boston. Both Route 2 and Route 12 pass through Leominster. Interstate 190,...

     and Fitchburg, Massachusetts
    Fitchburg, Massachusetts
    Fitchburg is the third largest city in Worcester County, Massachusetts, United States. The population was 40,318 at the 2010 census. Fitchburg is home to Fitchburg State University as well as 17 public and private elementary and high schools.- History :...

    ,
  • San Francisco and Oakland, California
    Oakland, California
    Oakland is a major West Coast port city on San Francisco Bay in the U.S. state of California. It is the eighth-largest city in the state with a 2010 population of 390,724...

  • San Diego, California in the United States
    United States
    The United States of America is a federal constitutional republic comprising fifty states and a federal district...

     and Tijuana, Baja California
    Tijuana
    Tijuana is the largest city on the Baja California Peninsula and center of the Tijuana metropolitan area, part of the international San Diego–Tijuana metropolitan area. An industrial and financial center of Mexico, Tijuana exerts a strong influence on economics, education, culture, art, and politics...

     in Mexico
    Mexico
    The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

  • Philadelphia, Pennsylvania, and Camden, New Jersey
    Camden, New Jersey
    The city of Camden is the county seat of Camden County, New Jersey. It is located across the Delaware River from Philadelphia, Pennsylvania. As of the 2010 United States Census, the city had a total population of 77,344...

  • Hartford, Connecticut
    Hartford, Connecticut
    Hartford is the capital of the U.S. state of Connecticut. The seat of Hartford County until Connecticut disbanded county government in 1960, it is the second most populous city on New England's largest river, the Connecticut River. As of the 2010 Census, Hartford's population was 124,775, making...

     and Springfield, Massachusetts
    Springfield, Massachusetts
    Springfield is the most populous city in Western New England, and the seat of Hampden County, Massachusetts, United States. Springfield sits on the eastern bank of the Connecticut River near its confluence with three rivers; the western Westfield River, the eastern Chicopee River, and the eastern...

    , also known as the Knowledge Corridor
    Knowledge Corridor
    The Knowledge Corridor is term for the area comprising north-central Connecticut and the south-central Connecticut River Valley in Western Massachusetts...

    , is the second most populous metropolitan region in New England
    New England
    New England is a region in the northeastern corner of the United States consisting of the six states of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, and Connecticut...

     with 1.9 million people.
  • Baltimore, Maryland
    Baltimore
    Baltimore is the largest independent city in the United States and the largest city and cultural center of the US state of Maryland. The city is located in central Maryland along the tidal portion of the Patapsco River, an arm of the Chesapeake Bay. Baltimore is sometimes referred to as Baltimore...

     and Washington, D.C.
    Washington, D.C.
    Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution....

     as part of the Baltimore–Washington Metropolitan Area, a megalopolis
    Megalopolis (city type)
    A megalopolis is typically defined as a chain of roughly adjacent metropolitan areas. The term was used by Oswald Spengler in his 1918 book, The Decline of the West, and Lewis Mumford in his 1938 book, The Culture of Cities, which described it as the first stage in urban overdevelopment and...

     with many other component cities and towns, including many in the State of Virginia.
  • Dallas, and Fort Worth, Texas
    Fort Worth, Texas
    Fort Worth is the 16th-largest city in the United States of America and the fifth-largest city in the state of Texas. Located in North Central Texas, just southeast of the Texas Panhandle, the city is a cultural gateway into the American West and covers nearly in Tarrant, Parker, Denton, and...

    , the main cities of the Dallas–Fort Worth Metroplex
    Dallas–Fort Worth metroplex
    The Dallas–Fort Worth–Arlington Metropolitan Statistical Area, a title designated by the U.S. Census as of 2003, encompasses 12 counties within the U.S. state of Texas. The area is divided into two metropolitan divisions: Dallas–Plano–Irving and Fort Worth–Arlington. Residents of the area...

    , a megalopolis
    Megalopolis (city type)
    A megalopolis is typically defined as a chain of roughly adjacent metropolitan areas. The term was used by Oswald Spengler in his 1918 book, The Decline of the West, and Lewis Mumford in his 1938 book, The Culture of Cities, which described it as the first stage in urban overdevelopment and...

     in northeastern Texas
    Texas
    Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

    .
  • Raleigh
    Raleigh, North Carolina
    Raleigh is the capital and the second largest city in the state of North Carolina as well as the seat of Wake County. Raleigh is known as the "City of Oaks" for its many oak trees. According to the U.S. Census Bureau, the city's 2010 population was 403,892, over an area of , making Raleigh...

     and Durham, North Carolina
    Durham, North Carolina
    Durham is a city in the U.S. state of North Carolina. It is the county seat of Durham County and also extends into Wake County. It is the fifth-largest city in the state, and the 85th-largest in the United States by population, with 228,330 residents as of the 2010 United States census...

    , the two main cities of the three-city Research Triangle area.
  • Ottawa
    Ottawa
    Ottawa is the capital of Canada, the second largest city in the Province of Ontario, and the fourth largest city in the country. The city is located on the south bank of the Ottawa River in the eastern portion of Southern Ontario...

    , Ontario
    Ontario
    Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

     and Gatineau
    Gatineau
    Gatineau is a city in western Quebec, Canada. It is the fourth largest city in the province. It is located on the northern banks of the Ottawa River, immediately across from Ottawa, Ontario, and together they form Canada's National Capital Region. Ottawa and Gatineau comprise a single Census...

    , Quebec
    Quebec
    Quebec or is a province in east-central Canada. It is the only Canadian province with a predominantly French-speaking population and the only one whose sole official language is French at the provincial level....

     are the two main cities of Canada's National Capital Region
    National Capital Region (Canada)
    The National Capital Region, also referred to as Canada's Capital Region, is an official federal designation for the Canadian capital of Ottawa, Ontario, the neighbouring city of Gatineau, Quebec, and surrounding urban and rural communities....

  • San Bernardino
    San Bernardino, California
    San Bernardino is a city located in the Riverside-San Bernardino metropolitan area , and serves as the county seat of San Bernardino County, California, United States...

     and Riverside, California
    Riverside, California
    Riverside is a city in Riverside County, California, United States, and the county seat of the eponymous county. Named for its location beside the Santa Ana River, it is the largest city in the Riverside-San Bernardino-Ontario metropolitan area of Southern California, 4th largest inland California...

    , the central cities of the area popularly known as the Inland Empire
    Inland Empire (California)
    The Inland Empire is a region in Southern California. The region sits directly east of the Los Angeles metropolitan area. The Inland Empire most commonly is used in reference to the U.S. Census Bureau's federally-defined Riverside-San Bernardino-Ontario metropolitan area, which covers more than...

    .
  • Fargo, North Dakota
    Fargo, North Dakota
    Fargo is the largest city in the U.S. state of North Dakota and the county seat of Cass County. In 2010, its population was 105,549, and it had an estimated metropolitan population of 208,777...

     and Moorhead, Minnesota
    Moorhead, Minnesota
    Moorhead is a city in Clay County, Minnesota, United States, and the largest city in northwest Minnesota. The population was 38,065 at the 2010 Census. It is the county seat of Clay County....

    , together referred to as Fargo–Moorhead
  • Detroit, Michigan and Windsor, Ontario
    Windsor, Ontario
    Windsor is the southernmost city in Canada and is located in Southwestern Ontario at the western end of the heavily populated Quebec City – Windsor Corridor. It is within Essex County, Ontario, although administratively separated from the county government. Separated by the Detroit River, Windsor...

  • Jersey City
    Jersey City, New Jersey
    Jersey City is the seat of Hudson County, New Jersey, United States.Part of the New York metropolitan area, Jersey City lies between the Hudson River and Upper New York Bay across from Lower Manhattan and the Hackensack River and Newark Bay...

     and Newark, New Jersey
    Newark, New Jersey
    Newark is the largest city in the American state of New Jersey, and the seat of Essex County. As of the 2010 United States Census, Newark had a population of 277,140, maintaining its status as the largest municipality in New Jersey. It is the 68th largest city in the U.S...

  • Columbus, Georgia
    Columbus, Georgia
    Columbus is a city in and the county seat of Muscogee County, Georgia, United States, with which it is consolidated. As of the 2010 census, the city had a population of 189,885. It is the principal city of the Columbus, Georgia metropolitan area, which, in 2009, had an estimated population of 292,795...

    , and Phenix City, Alabama
    Phenix City, Alabama
    Phenix City is a city and the county seat in Russell County in the U.S. state of Alabama. Portions of Lee County are addressed as Phenix City, 36870 ZIP code, for the sole purpose that Smiths Station does not have full incorporation to annex the area...

    , separated by the Chattahoochee River
    Chattahoochee River
    The Chattahoochee River flows through or along the borders of the U.S. states of Georgia, Alabama, and Florida. It is a tributary of the Apalachicola River, a relatively short river formed by the confluence of the Chattahoochee and Flint Rivers and emptying into Apalachicola Bay in the Gulf of...

    .
  • Duluth, Minnesota
    Duluth, Minnesota
    Duluth is a port city in the U.S. state of Minnesota and is the county seat of Saint Louis County. The fourth largest city in Minnesota, Duluth had a total population of 86,265 in the 2010 census. Duluth is also the second largest city that is located on Lake Superior after Thunder Bay, Ontario,...

    , and Superior, Wisconsin
    Superior, Wisconsin
    Superior is a city in and the county seat of Douglas County, Wisconsin, United States. The population was 26,960 at the 2010 census. Located at the junction of U.S. Highways 2 and 53, it is north of and adjacent to both the Village of Superior and the Town of Superior.Superior is at the western...

    , often referred to as the "Twin Ports
    Twin Ports
    The Twin Ports of Duluth, Minnesota and Superior, Wisconsin are located at the western part of Lake Superior and together are considered the largest freshwater port in the world. They are twin cities and seaports, connected to the Atlantic Ocean through the Great Lakes and the St. Lawrence...

    "
  • Halifax, Nova Scotia
    Metropolitan Halifax
    Metropolitan Halifax , often referred to as Metro Halifax, or Halifax, is the urban part of the Halifax Regional Municipality, a regional municipality that covers a large area of Nova Scotia, including rural areas...

     and Dartmouth, Nova Scotia
    Dartmouth, Nova Scotia
    Dartmouth founded in 1750, is a community and planning area of the Halifax Regional Municipality, Nova Scotia. Located on the eastern shore of Halifax Harbour, Dartmouth has been nicknamed the City of Lakes after the large number of lakes located in the city.On April 1, 1996, the provincial...

    . Even though both cities were merged into the Halifax Regional Municipality they are geographically separated by Halifax Harbour
    Halifax Harbour
    Halifax Harbour is a large natural harbour on the Atlantic coast of Nova Scotia, Canada, located in the Halifax Regional Municipality.-Harbour description:The harbour is called Jipugtug by the Mi'kmaq first nation, anglisized as Chebucto...

     and still retain separate identities.
  • Monroe, Louisiana
    Monroe, Louisiana
    Monroe is a city in and the parish seat of Ouachita Parish, Louisiana, United States. As of the 2000 census, the city had a total population of 53,107, making it the eighth largest city in Louisiana. A July 1, 2007, United States Census Bureau estimate placed the population at 51,208, but 51,636...

     and West Monroe, Louisiana
    West Monroe, Louisiana
    West Monroe is a city in Ouachita Parish, Louisiana, United States. The population was 13,250 at the 2000 census. It is part of the Monroe Metropolitan Statistical Area....

  • South Bend
    South Bend, Indiana
    The city of South Bend is the county seat of St. Joseph County, Indiana, United States, on the St. Joseph River near its southernmost bend, from which it derives its name. As of the 2010 Census, the city had a total of 101,168 residents; its Metropolitan Statistical Area had a population of 316,663...

     and Mishawaka, Indiana
    Mishawaka, Indiana
    Mishawaka is a city on the St. Joseph River and a Twin city of South Bend in St. Joseph County, Indiana, United States. The population was 48,252 as of the 2010 Census...

  • Benton Harbor
    Benton Harbor, Michigan
    Benton Harbor is a city in Berrien County in the U.S. state of Michigan which is located west of Kalamazoo. The population was 10,038 at the 2010 census. It is the lesser populated of the two principal cities included in the Niles-Benton Harbor, Michigan Metropolitan Statistical Area, which has a...

     and St. Joseph, Michigan
    St. Joseph, Michigan
    St. Joseph is a city in the US state of Michigan. It was incorporated as a village in 1834 and as a city in 1891. As of the 2000 census, the city population was 8,789. It lies on the shore of Lake Michigan, at the mouth of the St. Joseph River, about east-northeast of Chicago. It is the county...

    , locally referred to as the "Twin Cities".
  • Niagara Falls, Ontario
    Niagara Falls, Ontario
    Niagara Falls is a Canadian city on the Niagara River in the Golden Horseshoe region of Southern Ontario. The municipality was incorporated on June 12, 1903...

     and Niagara Falls, New York
    Niagara Falls, New York
    Niagara Falls is a city in Niagara County, New York, United States. As of the 2010 census, the city had a total population of 50,193, down from the 55,593 recorded in the 2000 census. It is across the Niagara River from Niagara Falls, Ontario , both named after the famed Niagara Falls which they...

  • Mount Vernon
    Mount Vernon, Iowa
    Mount Vernon is a city in Linn County, Iowa, United States, adjacent to the city of Lisbon. The city's population was 3,390 when the 2000 census figures were released, but that number was later revised to 3,808 because the Census Bureau had incorrectly reported that 418 residents of a Cornell...

     and Lisbon, Iowa
    Lisbon, Iowa
    Lisbon is a city in Linn County, Iowa, United States, adjacent to the city of Mount Vernon. The population was 2,152 at the 2010 census. It is part of the Cedar Rapids Metropolitan Statistical Area.-Geography:Lisbon is located at ....

  • Lewiston
    Lewiston, Maine
    Lewiston is a city in Androscoggin County in Maine, and the second-largest city in the state. The population was 41,592 at the 2010 census. It is one of two principal cities of and included within the Lewiston-Auburn, Maine metropolitan New England city and town area and the Lewiston-Auburn, Maine...

     and Auburn, Maine
    Auburn, Maine
    Auburn is a city in and the county seat of Androscoggin County, Maine, United States. The population was 23,055 at the 2010 census. It is one of two principal cities of and included in the Lewiston-Auburn, Maine metropolitan New England city and town area and the Lewiston-Auburn, Maine metropolitan...

    , sometimes locally referred to as "LA" or as the Twin Cities.
  • Houghton
    Houghton, Michigan
    Houghton is a city in the U.S. state of Michigan's Upper Peninsula and largest city in the Copper Country on the Keweenaw Peninsula. As of the 2010 census, the city population was 7,708. It is the county seat of Houghton County...

     and Hancock, Michigan
    Hancock, Michigan
    Hancock is a city in Houghton County; the northernmost in the U.S. state of Michigan, located on the Keweenaw Peninsula, or, depending on terminology, Copper Island. The population was 4,634 at the 2010 census...

  • Utica
    Utica, New York
    Utica is a city in and the county seat of Oneida County, New York, United States. The population was 62,235 at the 2010 census, an increase of 2.6% from the 2000 census....

     and Rome, New York
    Rome, New York
    Rome is a city in Oneida County, New York, United States. It is located in north-central or "upstate" New York. The population was 44,797 at the 2010 census. It is in New York's 24th congressional district. In 1758, British forces began construction of Fort Stanwix at this strategic location, but...

  • Brownsville, Texas
    Brownsville, Texas
    Brownsville is a city in the southernmost tip of the state of Texas, in the United States. It is located on the northern bank of the Rio Grande, directly north and across the border from Matamoros, Tamaulipas, Mexico. Brownsville is the 16th largest city in the state of Texas with a population of...

     and Matamoros, Tamaulipas
    Matamoros, Tamaulipas
    Matamoros, officially known as Heroica Matamoros, is a city in the northeastern part of Tamaulipas, in the country of Mexico. It is located on the southern bank of the Rio Grande, directly across the border from Brownsville, Texas, in the United States. Matamoros is the second largest and second...

  • Laredo, Texas
    Laredo, Texas
    Laredo is the county seat of Webb County, Texas, United States, located on the north bank of the Rio Grande in South Texas, across from Nuevo Laredo, Tamaulipas, Mexico. According to the 2010 census, the city population was 236,091 making it the 3rd largest on the United States-Mexican border,...

     and Nuevo Laredo
    Nuevo Laredo
    Nuevo Laredo is a city located in the Municipality of Nuevo Laredo in the Mexican state of Tamaulipas. The city lies on the banks of the Río Grande, across from the United States city of Laredo, Texas. The 2010 census population of the city was 373,725. Nuevo Laredo is part of the Laredo-Nuevo...

    , Tamaulipas
    Tamaulipas
    Tamaulipas officially Estado Libre y Soberano de Tamaulipas is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 43 municipalities and its capital city is Ciudad Victoria. The capital city was named after Guadalupe Victoria, the...

  • Bluefield, Virginia
    Bluefield, Virginia
    Bluefield is a town in Tazewell County, Virginia, along the Bluestone River. The population was 5,078 at the 2000 census. It is part of the Bluefield WV-VA micropolitan area which has a population of 107,578...

     and Bluefield, West Virginia
    Bluefield, West Virginia
    Bluefield is a city in Mercer County, West Virginia, United States. The population was 10,447 at the 2010 census. It is also the core city of the Bluefield WV-VA micropolitan area which has a population of 107,342.-Geography & Climate:...

  • Bloomington
    Bloomington, Illinois
    Bloomington is a city in McLean County, Illinois, United States and the county seat. It is adjacent to Normal, Illinois, and is the more populous of the two principal municipalities of the Bloomington-Normal metropolitan area...

     and Normal, Illinois
    Normal, Illinois
    Normal is an incorporated town in McLean County, Illinois, United States. It had a population of 52,497 as of the 2010 census. Normal is the smaller of two principal municipalities of the Bloomington-Normal metropolitan area...

  • Bristol, Virginia
    Bristol, Virginia
    Bristol is an independent city in Virginia, United States, bounded by Washington County, Virginia, Bristol, Tennessee, and Sullivan County, Tennessee....

     and Bristol, Tennessee
    Bristol, Tennessee
    Bristol is a city in Sullivan County, Tennessee, United States. The population was 26,702 at the 2010 census. It is the twin city of Bristol, Virginia, which lies directly across the state line between Tennessee and Virginia. The boundaries of both cities run parallel to each other along State...

    , part of the Tri-Cities, Tennessee
    Tri-Cities, Tennessee
    In Tennessee and Virginia the name "Tri-Cities" refers to the region comprising the cities of Kingsport, Johnson City and Bristol and the surrounding smaller towns and communities in Northeast Tennessee and Southwest Virginia...

     area — named for Bristol as a whole, Kingsport
    Kingsport, Tennessee
    Kingsport is a city located mainly in Sullivan County with some western portions in Hawkins County in the US state of Tennessee. The majority of the city lies in Sullivan County...

    , and Johnson City, Tennessee
    Johnson City, Tennessee
    Johnson City is a city in Carter, Sullivan, and Washington counties in the U.S. state of Tennessee, with most of the city being in Washington County...

    .
  • Nogales, Arizona
    Nogales, Arizona
    Nogales is a city in Santa Cruz County, Arizona, United States. The population was 21,017 at the 2010 census. According to 2005 Census Bureau estimates, the population of the city is 20,833. The city is the county seat of Santa Cruz County....

     and Nogales, Sonora
    Nogales, Sonora
    Heroica Nogales , more commonly known as Nogales, is a city and its surrounding municipality on the northern border of the Mexican State of Sonora. The municipality covers an area of 1,675 km², and borders to the north the city of Nogales, Arizona, United States, across the U.S.-Mexico border...

  • Shreveport, Louisiana
    Shreveport, Louisiana
    Shreveport is the third largest city in Louisiana. It is the principal city of the fourth largest metropolitan area in the state of Louisiana and is the 109th-largest city in the United States....

     and Bossier City, Louisiana
    Bossier City, Louisiana
    Bossier City is a city in Bossier Parish, Louisiana, United States.As of the 2010 Census, the city had a total population of 61,315. Bossier City is closely tied to its larger sister city Shreveport, located on the western bank of the Red River. The Shreveport-Bossier City metropolitan area is the...

  • Texarkana, Texas
    Texarkana, Texas
    Texarkana is a city in Bowie County, Texas, United States. It effectively functions as one half of a city which crosses a state line — the other half, the city of Texarkana, Arkansas, lies on the other side of State Line Avenue...

     and Texarkana, Arkansas
    Texarkana, Arkansas
    As of the census of 2000, there were 26,448 people, 10,384 households, and 7,040 families residing in the city. The population density was 830.5 people per square mile . There were 11,721 housing units at an average density of 368.1 per square mile...

  • Kenai
    Kenai, Alaska
    Kenai is a city in Kenai Peninsula Borough in the U.S. state of Alaska. According to 2005 Census Bureau estimates, the population of the city is 7,464...

     and Soldotna, Alaska
    Soldotna, Alaska
    As of the census of 2000, there were 3,759 people, 1,465 households, and 969 families residing in the city. As of 2008, the population was close to 4,200. The population density was 541.9 people per square mile . There were 1,670 housing units at an average density of 240.7 per square mile...

  • Sault Ste. Marie, Michigan
    Sault Ste. Marie, Michigan
    Sault Ste. Marie is a city in and the county seat of Chippewa County in the U.S. state of Michigan. It is in the north-eastern end of Michigan's Upper Peninsula, on the Canadian border, separated from its twin city of Sault Ste. Marie, Ontario, by the St. Marys River...

     and Sault Ste. Marie, Ontario
    Sault Ste. Marie, Ontario
    Sault Ste. Marie is a city on the St. Marys River in Algoma District, Ontario, Canada. It is the third largest city in Northern Ontario, after Sudbury and Thunder Bay, with a population of 74,948. The community was founded as a French religious mission: Sault either means "jump" or "rapids" in...

  • Gulfport
    Gulfport, Mississippi
    Gulfport is the second largest city in Mississippi after the state capital Jackson. It is the larger of the two principal cities of the Gulfport-Biloxi, Mississippi Metropolitan Statistical Area, which is included in the Gulfport-Biloxi-Pascagoula, Mississippi Combined Statistical Area. As of the...

     and Biloxi, Mississippi
    Biloxi, Mississippi
    Biloxi is a city in Harrison County, Mississippi, in the United States. The 2010 census recorded the population as 44,054. Along with Gulfport, Biloxi is a county seat of Harrison County....

  • Portland, Oregon
    Portland, Oregon
    Portland is a city located in the Pacific Northwest, near the confluence of the Willamette and Columbia rivers in the U.S. state of Oregon. As of the 2010 Census, it had a population of 583,776, making it the 29th most populous city in the United States...

     and Vancouver, Washington
    Vancouver, Washington
    Vancouver is a city on the north bank of the Columbia River in the U.S. state of Washington. Incorporated in 1857, it is the fourth largest city in the state with a 2010 census population of 161,791 as of April 1, 2010...

  • Seattle and Tacoma, Washington
    Tacoma, Washington
    Tacoma is a mid-sized urban port city and the county seat of Pierce County, Washington, United States. The city is on Washington's Puget Sound, southwest of Seattle, northeast of the state capital, Olympia, and northwest of Mount Rainier National Park. The population was 198,397, according to...

  • Reno
    Reno, Nevada
    Reno is the county seat of Washoe County, Nevada, United States. The city has a population of about 220,500 and is the most populous Nevada city outside of the Las Vegas metropolitan area...

     and Sparks, Nevada
    Sparks, Nevada
    Sparks is a city in Washoe County, Nevada, United States, located east of Reno, Nevada. The 2010 U.S. Census Bureau population count was 90,264. Sparks is often referred to as half of a twin city .-Geography and Climate:...

  • Bismarck
    Bismarck, North Dakota
    Bismarck is the capital of the U.S. state of North Dakota and the county seat of Burleigh County. It is the second most populous city in North Dakota after Fargo. The city's population was 61,272 at the 2010 census, while its metropolitan population was 108,779...

     and Mandan, North Dakota
    Mandan, North Dakota
    As of the census of 2000, there were 16,718 people, 6,647 households, and 4,553 families residing in the city. The population density was 1,642.8 per square mile . There were 6,958 housing units at an average density of 683.7 per square mile...

    , also known as Sister Cities to local residents.
  • Lancaster
    Lancaster, California
    Lancaster is a charter city in northern Los Angeles County, in the high desert, near the Kern County line. Lancaster currently ranks as the 30th largest city in California, and the 148th largest city in the United States. Lancaster is the principal city within the Antelope Valley...

     and Palmdale, California
    Palmdale, California
    Palmdale is a city located in the center of northern Los Angeles County, California, United States.Palmdale was the first community within the Antelope Valley to incorporate as a city on August 24, 1962; 47 years later, voters approved creating a charter city in November, 2009. Palmdale is...

  • Fort Myers
    Fort Myers, Florida
    Fort Myers is the county seat and commercial center of Lee County, Florida, United States. Its population was 62,298 in the 2010 census, a 29.23 percent increase over the 2000 figure....

     and Cape Coral, Florida
    Cape Coral, Florida
    Cape Coral is a municipality located in Lee County, Florida, United States, on the Gulf of Mexico. Founded in 1957 and developed as a master-planned, pre-platted community, the city grew to a population of 154,305 by the year 2010. With an area of , Cape Coral is the largest city between Tampa and...

  • Delmar, Delaware
    Delmar, Delaware
    As of the census of 2000, there were 1,407 people, 542 households, and 344 families residing in the town. The population density was 1,498.9 people per square mile . There were 595 housing units at an average density of 633.9 per square mile...

     and Delmar, Maryland
    Delmar, Maryland
    Delmar is a town in Wicomico County, Maryland, United States. The population was 3,003 at the 2010 census. It is included in the Salisbury, Maryland Metropolitan Statistical Area. When the population is added to "twin city" Delmar, Delaware the town's total population is 4,600...

  • Marydel, Delaware
    Marydel, Delaware
    Marydel is an unincorporated community in Kent County, Delaware, United States. It lies along Delaware Route 8 West of the city of Dover, the county seat of Kent County and Delaware's state capital. Because the community has borne multiple names, the Board on Geographic Names officially...

     and Marydel, Maryland
    Marydel, Maryland
    Marydel is a town in Caroline County, Maryland, United States. The population was 147 at the 2000 census. It is named after its location, being partially located in Maryland and partially in Delaware.-Geography:...

  • McAllen, Texas
    McAllen, Texas
    McAllen is the largest city in Hidalgo County, Texas, United States. It is located at the southern tip of Texas in an area known as the Rio Grande Valley and is part of the . Its southern boundary is located about five miles from the U.S.–Mexico border and the Mexican city of Reynosa, the Rio...

     and Reynosa, Tamaulipas
  • Grand Forks, North Dakota
    Grand Forks, North Dakota
    Grand Forks is the third-largest city in the U.S. state of North Dakota and the county seat of Grand Forks County. According to the 2010 census, the city's population was 52,838, while that of the city and surrounding metropolitan area was 98,461...

     and East Grand Forks, Minnesota
    East Grand Forks, Minnesota
    -K-12:The East Grand Forks School District enrolls over 1,000 students and operates two elementary schools , Central Middle School, and East Grand Forks Senior High School. There are also two private Christian schools. Sacred Heart School is a Roman Catholic elementary, middle, and high school...

  • Eureka
    Eureka, California
    Eureka is the principal city and the county seat of Humboldt County, California, United States. Its population was 27,191 at the 2010 census, up from 26,128 at the 2000 census....

     and Arcata, California
    Arcata, California
    -Demographics:-2010 Census data:The 2010 United States Census reported that Arcata had a population of 17,231. The population density was 1,567.4 people per square mile...

  • Lewiston, Idaho
    Lewiston, Idaho
    Lewiston is a city in and also the county seat of Nez Perce County in the Pacific Northwest state of Idaho. It is the second-largest city in the northern Idaho region, behind Coeur d'Alene and ninth-largest in the state. Lewiston is the principal city of the Lewiston, ID - Clarkston, WA...

     and Clarkston, Washington
    Clarkston, Washington
    Clarkston is a city in Asotin County in the southeastern part of the U.S. state of Washington. It is part of the Lewiston ID-WA Metropolitan Statistical Area. The population was 7,229 in 2010....

    , named after the explorers
    Lewis and Clark Expedition
    The Lewis and Clark Expedition, or ″Corps of Discovery Expedition" was the first transcontinental expedition to the Pacific Coast by the United States. Commissioned by President Thomas Jefferson and led by two Virginia-born veterans of Indian wars in the Ohio Valley, Meriwether Lewis and William...

     who first visited the region.
  • Scranton
    Scranton, Pennsylvania
    Scranton is a city in the northeastern part of Pennsylvania, United States. It is the county seat of Lackawanna County and the largest principal city in the Scranton/Wilkes-Barre metropolitan area. Scranton had a population of 76,089 in 2010, according to the U.S...

     and Wilkes-Barre, Pennsylvania
    Wilkes-Barre, Pennsylvania
    Wilkes-Barre is a city in the U.S. state of Pennsylvania, the county seat of Luzerne County. It is at the center of the Wyoming Valley area and is one of the principal cities in the Scranton/Wilkes-Barre metropolitan area, which had a population of 563,631 as of the 2010 Census...

  • High Point
    High Point, North Carolina
    High Point is a city located in the Piedmont Triad region of North Carolina. As of 2010 the city had a total population of 104,371, according to the US Census Bureau. High Point is currently the eighth-largest municipality in North Carolina....

     and Greensboro, North Carolina
    Greensboro, North Carolina
    Greensboro is a city in the U.S. state of North Carolina. It is the third-largest city by population in North Carolina and the largest city in Guilford County and the surrounding Piedmont Triad metropolitan region. According to the 2010 U.S...

    , two of the three cities that are the focal points of the Piedmont Triad
    Piedmont Triad
    The Piedmont Triad, or Triad, is a north-central region of the U.S. state of North Carolina that consists of the area within and surrounding the three major cities of Greensboro, Winston-Salem, and High Point. This close group or "triad" of cities lies in the Piedmont geographical region of the...

  • Prairie du Sac
    Prairie du Sac, Wisconsin
    Prairie du Sac is a village in Sauk County, Wisconsin, United States. The population was 3,231 at the 2000 census. The village is surrounded by the Town of Prairie du Sac, the Wisconsin River, and the village of Sauk City; together, Prairie du Sac and Sauk City are referred to as Sauk...

     and Sauk City, Wisconsin
    Sauk City, Wisconsin
    Sauk City is a village in Sauk County, Wisconsin, United States. The population was 3,109 at the 2000 census. The first incorporated village in the state, the community was founded by Agoston Haraszthy and his business partner, Robert Bryant...

    , commonly referred to as Sauk Prairie, Wisconsin
    Sauk Prairie, Wisconsin
    Sauk Prairie is the nickname for the twin villages of Sauk City and Prairie du Sac, located on the west bank of the Wisconsin River in southeastern Sauk County, Wisconsin, approximately 13 miles south of Baraboo, and 18 miles northwest of metropolitan Madison, where U.S. Highway 12 crosses the...

  • Urbana
    Urbana, Illinois
    Urbana is the county seat of Champaign County, Illinois, United States. As of the 2010 census, the population was 41,250. Urbana is the tenth-most populous city in Illinois outside of the Chicago metropolitan area....

     and Champaign, Illinois
    Champaign, Illinois
    Champaign is a city in Champaign County, Illinois, in the United States. The city is located south of Chicago, west of Indianapolis, Indiana, and 178 miles northeast of St. Louis, Missouri. Though surrounded by farm communities, Champaign is notable for sharing the campus of the University of...

     — see also Champaign–Urbana Metropolitan Area and University of Illinois at Urbana–Champaign
  • Allentown
    Allentown, Pennsylvania
    Allentown is a city located in Lehigh County, Pennsylvania, in the United States. It is Pennsylvania's third most populous city, after Philadelphia and Pittsburgh, and the 215th largest city in the United States. As of the 2010 census, the city had a total population of 118,032 and is currently...

     and Bethlehem, Pennsylvania
    Bethlehem, Pennsylvania
    Bethlehem is a city in Lehigh and Northampton Counties in the Lehigh Valley region of eastern Pennsylvania, in the United States. As of the 2010 census, the city had a total population of 74,982, making it the seventh largest city in Pennsylvania, after Philadelphia, Pittsburgh, Allentown, Erie,...

    , the main cities of the Lehigh Valley
    Lehigh Valley
    The Lehigh Valley, known officially by the United States Census Bureau as the Allentown-Bethlehem-Easton, PA-NJ metropolitan area and referred to locally as The Valley and A-B-E, is a metropolitan region consisting of Lehigh, Northampton, Berks, and Carbon counties in eastern Pennsylvania and...

     metropolitan area.
  • Easton, Pennsylvania
    Easton, Pennsylvania
    Easton is a city in Northampton County, Pennsylvania, United States. The population was 26,800 as of the 2010 census. It is the county seat of Northampton County....

     and Phillipsburg, New Jersey
    Phillipsburg, New Jersey
    Phillipsburg, known locally as P'burg, is a town in Warren County, New Jersey, in the United States. As of 2010 United States Census, the town's population was 14,950....

  • Kitchener
    Kitchener, Ontario
    The City of Kitchener is a city in Southern Ontario, Canada. It was the Town of Berlin from 1854 until 1912 and the City of Berlin from 1912 until 1916. The city had a population of 204,668 in the Canada 2006 Census...

     and Waterloo, Ontario
    Waterloo, Ontario
    Waterloo is a city in Southern Ontario, Canada. It is the smallest of the three cities in the Regional Municipality of Waterloo, and is adjacent to the city of Kitchener....

  • Veracruz, Veracruz
    Veracruz, Veracruz
    Veracruz, officially known as Heroica Veracruz, is a major port city and municipality on the Gulf of Mexico in the Mexican state of Veracruz. The city is located in the central part of the state. It is located along Federal Highway 140 from the state capital Xalapa, and is the state's most...

     and Boca del Río, Veracruz
    Boca del Río, Veracruz
    Boca del Río is a city and municipality located in the center of the state of Veracruz. The small city of Boca del Río serves as the seat of the municipality. The municipality lies just south of Veracruz Municipality, and contains a part of the city and port of Veracruz, Mexico...

  • Fulton, Kentucky
    Fulton, Kentucky
    Fulton is a city in Fulton County, Kentucky, United States. The population was 2,775 at the 2000 census. It was once known as the "Banana Capital of the World" because 70% of imported bananas to the U.S. used to be shipped there . U.S...

     and South Fulton, Tennessee
    South Fulton, Tennessee
    South Fulton is a city in Obion County, Tennessee, in the United States. The population was 2,517 at the 2000 census. It is part of the Union City, TN–KY Micropolitan Statistical Area.-Geography:South Fulton is located at ....

  • Colorado City, Arizona
    Colorado City, Arizona
    Colorado City is a town in Mohave County, Arizona, United States, and is located in a region known as the Arizona Strip. According to 2006 Census Bureau estimates, the population of the town was 4,607...

     and Hildale, Utah
    Hildale, Utah
    Hildale is a city in Washington County, Utah, United States. The population was 2,726 at the 2010 census.Hildale is a twin city to the more well-known Colorado City, Arizona, both of which straddle the border between Utah and Arizona. Hildale is the headquarters of the Fundamentalist Church of...

    , best known as the historic center of the Fundamentalist Church of Jesus Christ of Latter Day Saints
    Fundamentalist Church of Jesus Christ of Latter Day Saints
    The Fundamentalist Church of Jesus Christ of Latter-Day Saints is one of the largest Mormon fundamentalist denominations and one of the largest organizations in the United States whose members practice polygamy. The FLDS Church emerged in the early twentieth century when its founding members left...

    , a polygamous offshoot of the Latter Day Saint movement
    Latter Day Saint movement
    The Latter Day Saint movement is a group of independent churches tracing their origin to a Christian primitivist movement founded by Joseph Smith, Jr. in the late 1820s. Collectively, these churches have over 14 million members...

    .
  • Helena
    Helena, Arkansas
    Helena is the eastern portion of Helena-West Helena, Arkansas, a city in Phillips County, Arkansas. As of the 2000 census, this portion of the city population was 6,323. Helena was the county seat of Phillips County until January 1, 2006, when it merged its government and city limits with...

     and West Helena, Arkansas
    West Helena, Arkansas
    West Helena is the western portion of Helena-West Helena, Arkansas, a city in Phillips County, Arkansas, United States. As of the 2000 census, this portion of the city population was 8,689....

     were twin cities before a 2006 merger formed the current city of Helena-West Helena
    Helena-West Helena, Arkansas
    Helena-West Helena is the county seat of and the largest city within Phillips County, Arkansas, United States. The current city represents a consolidation, effective on January 1, 2006, of the two Arkansas cities of Helena and West Helena. West Helena is located on the western side of Crowley's...

    .
  • Gering
    Gering, Nebraska
    Gering is a city in Scotts Bluff County, Nebraska, United States. It is part of the Scottsbluff, Nebraska Micropolitan Statistical Area. The population was 7,751 at the 2000 census. It is the county seat of Scotts Bluff County....

     and Scottsbluff, Nebraska
    Scottsbluff, Nebraska
    Scottsbluff is a city in Scotts Bluff County, Nebraska, United States. The population was 15,039 at the 2010 census. Scottsbluff is the largest city in the Nebraska Panhandle, and the 13th largest city in Nebraska....

  • Eau Claire
    Eau Claire, Wisconsin
    Eau Claire is a city located in the west-central part of the U.S. state of Wisconsin. The population was 65,883 as of the 2010 census, making it the largest municipality in the northwestern portion of the state, and the 9th largest in the state overall. It is the county seat of Eau Claire County,...

     and Altoona, Wisconsin
    Altoona, Wisconsin
    Altoona is a city in Eau Claire County, Wisconsin, United States. The population was 6,706 at the 2010 census. The city is a railroad terminal on the Union Pacific Railroad.-History:...

  • Tampa
    Tampa, Florida
    Tampa is a city in the U.S. state of Florida. It serves as the county seat for Hillsborough County. Tampa is located on the west coast of Florida. The population of Tampa in 2010 was 335,709....

     and St. Petersburg, Florida
    St. Petersburg, Florida
    St. Petersburg is a city in Pinellas County, Florida, United States. It is known as a vacation destination for both American and foreign tourists. As of 2008, the population estimate by the U.S. Census Bureau is 245,314, making St...

    , the two largest cities of the Tampa Bay Area
    Tampa Bay Area
    The Tampa Bay Area is the region of west central Florida adjacent to Tampa Bay. Definitions of the region vary. It is often considered equivalent to the Tampa-St. Petersburg-Clearwater Metropolitan Statistical Area defined by the United States Census Bureau. The Census Bureau currently...

  • Akron, Ohio
    Akron, Ohio
    Akron , is the fifth largest city in the U.S. state of Ohio and the county seat of Summit County. It is located in the Great Lakes region approximately south of Lake Erie along the Little Cuyahoga River. As of the 2010 census, the city had a population of 199,110. The Akron Metropolitan...

     and Canton, Ohio
    Canton, Ohio
    Canton is the county seat of Stark County in northeastern Ohio, approximately south of Akron and south of Cleveland.The City of Caton is the largest incorporated area within the Canton-Massillon Metropolitan Statistical Area...

  • Greenville
    Greenville, South Carolina
    -Law and government:The city of Greenville adopted the Council-Manager form of municipal government in 1976.-History:The area was part of the Cherokee Nation's protected grounds after the Treaty of 1763, which ended the French and Indian War. No White man was allowed to enter, though some families...

     and Spartanburg, South Carolina
    Spartanburg, South Carolina
    thgSpartanburg is the largest city in and the county seat of Spartanburg County, South Carolina, United States. It is the second-largest city of the three primary cities in the Upstate region of South Carolina, and is located northwest of Columbia, west of Charlotte, and about northeast of...

    , the two largest cities of the Upstate South Carolina area.

South America

  • Leticia, Colombia and Tabatinga
    Tabatinga
    Tabatinga is a municipality in the Três Fronteiras area of Northwestern Brazil. It is located in the Brazilian state of Amazonas. Its population was 45,293...

    , Brazil.
  • Chuy
    Chuy
    Chuy is a town in the extreme east of Uruguay, in the Rocha Department, northeast of Montevideo. It lies on the border with Brazil, separated from its Brazilian sister town of Chui only by a shared avenue that serves as the border, and by the Arroyo Chuy to the east...

    , Uruguay and Chuí
    Chui
    -Places:In Kyrgyzstan:*Chui Province*Chui RiverIn South America:*Chuí, Rio Grande do Sul*Chui Stream, on the Brazil-Uruguay borderIn SwahiliChui means Leopard...

    , Brazil.
  • Rivera
    Rivera
    Rivera is the capital of Rivera Department of Uruguay. It is located at the north end of Route 5, on the border with Brazil. The Brazilian city of Santana do Livramento is right across the border, only a street away of it...

    , Uruguay and Santana do Livramento
    Santana do Livramento
    Santana do Livramento is a city in the state of Rio Grande do Sul, Brazil. It is located along the border with the city of Rivera, Uruguay, which helps form an international city of 200,000 inhabitants.- Overview :...

    , Brazil.
  • Vitória and Vila Velha
    Vila Velha
    Vila Velha is a coastal town in Espírito Santo, Brazil. It lies across from Vitória, the state capital. Its population was 396,323 and its area is 208.82 km².Vila Velha forms part of the Greater Vitória metropolitan area...

    , Brazil.
  • Aparecida
    Aparecida
    Aparecida is a Brazilian city and municipality in the state of São Paulo. It is located in the fertile valley of the River Paraíba do Sul on the southern bank. The population in 2004 was 35,754 and the area of the municipality is 121.232 km²...

     and Guaratinguetá, Brazil.
  • Florianópolis
    Florianópolis
    -Climate:Florianópolis experiences a warm humid subtropical climate, falling just short of a true tropical climate. The seasons of the year are distinct, with a well-defined summer and winter, and characteristic weather for autumn and spring. Frost is infrequent, but occurs occasionally in the winter...

     and São José
    São José, Santa Catarina
    São José is a city in Santa Catarina, Brazil. It is a suburb located approximately five kilometers from Florianópolis, the state capital...

    , Brazil.
  • Juazeiro
    Juazeiro
    Juazeiro is a city and municipality in eastern Brazil in the state of Bahia . It had a population of 260,004, according to the 2010 census, and an area of 6,415.4 km². The population density was 31.34 hab/km² . The elevation is 373 meters. It became a city in 1833...

     and Petrolina
    Petrolina
    Petrolina is a city located in the southernmost point of the state of Pernambuco, in Brazil. The population was 281.851 in 2009 in a total area of 4756.8 km²....

    , Brazil.
  • Recife
    Recife
    Recife is the fifth-largest metropolitan area in Brazil with 4,136,506 inhabitants, the largest metropolitan area of the North/Northeast Regions, the 5th-largest metropolitan influence area in Brazil, and the capital and largest city of the state of Pernambuco. The population of the city proper...

     and Olinda
    Olinda
    Olinda is a historic city in the Brazilian state of Pernambuco, located on the country's northeastern Atlantic Ocean coast, just north of Recife and south of Paulista...

    , Brazil.
  • Ilhéus
    Ilhéus
    Ilhéus is a major city located in the southern coastal region of Bahia, Brazil, 430 km south of Salvador, the state's capital. The city was originally founded in 1534 as Vila de São Jorge dos Ilhéus and is known as one of the most important tourism centers of the northeast of Brazil.The...

     and Itabuna
    Itabuna
    Itabuna is a city in Bahia, Brazil. Located around , it's the 6th city in Bahia, after Salvador, Feira de Santana, Vitória da Conquista, Juazeiro and Ilhéus in size of population, with an estimative of 209,211 inhabitants in 2006. The city covers a total area of 443.2 km².Itabuna became a city...

    , Brazil.
  • Foz do Iguaçu
    Foz do Iguaçu
    Foz do Iguaçu is the 7th largest city in Paraná state, Brazil, with a population of 255,900 inhabitants. It is located approximately 650 km west of Curitiba, Parana's capital city, being the westernmost city in that state...

    , Brazil, Puerto Iguazu
    Puerto Iguazú
    Puerto Iguazú is a frontier city in the province of Misiones, Argentina. With a population of 82.227 ,it is the fifth largest city in the Province, after Posadas, Oberá, Eldorado and San Vicente....

    , Argentina, and Ciudad del Este
    Ciudad del Este
    Ciudad del Este is the second largest city in Paraguay and capital of Alto Paraná department, located at the Rio Paraná....

    , Paraguay.
  • Valparaiso
    Valparaíso
    Valparaíso is a city and commune of Chile, center of its third largest conurbation and one of the country's most important seaports and an increasing cultural center in the Southwest Pacific hemisphere. The city is the capital of the Valparaíso Province and the Valparaíso Region...

     and Viña del Mar
    Viña del Mar
    Viña del Mar , is a city and commune on central Chile's Pacific coast. Its long stretches of white sandy beaches are a major attraction for national and international tourists. The city is Chile's main tourist attraction. Known as "La Ciudad Jardín" , Viña del Mar is a Chilean Municipality located...

    , Chile.
  • La Serena and Coquimbo
    Coquimbo
    Coquimbo is a port city, commune and capital of the Elqui Province, located on the Pan-American Highway, in the Coquimbo Region of Chile. Coquimbo lies in a valley south of La Serena, with which it forms Greater La Serena with more than 400,000 inhabitants. The commune spans an area around the...

    , Chile.
  • Concepción
    Concepción, Chile
    Concepción is a city in Chile, capital of Concepción Province and of the Biobío Region or Region VIII. Greater Concepción is the second-largest conurbation in the country, with 889,725 inhabitants...

     and Talcahuano
    Talcahuano
    Talcahuano is a port city and commune in the Biobío Region of Chile. It is part of the Greater Concepción conurbation. Talcahuano is located in the south of the Central Zone of Chile.-Geography:...

    , Chile.
  • Barranquilla
    Barranquilla
    Barranquilla is an industrial port city and municipality located in northern Colombia, near the Caribbean Sea. The capital of the Atlántico Department, it is the largest industrial city and port in the Colombian Caribbean region with a population of 1,148,506 as of 2005, which makes it Colombia's...

     and Soledad
    Soledad, Atlántico
    Soledad is a municipality in the Colombian department of Atlántico part of the metropolitan area of Barranquilla is 6th in population in Colombia and the 3rd in the Caribbean region, after Barranquilla and Cartagena. It is also the city with the highest population growth in Colombia and in 2005 was...

    , Colombia.
  • Lima
    Lima
    Lima is the capital and the largest city of Peru. It is located in the valleys of the Chillón, Rímac and Lurín rivers, in the central part of the country, on a desert coast overlooking the Pacific Ocean. Together with the seaport of Callao, it forms a contiguous urban area known as the Lima...

     and Callao
    Callao
    Callao is the largest and most important port in Peru. The city is coterminous with the Constitutional Province of Callao, the only province of the Callao Region. Callao is located west of Lima, the country's capital, and is part of the Lima Metropolitan Area, a large metropolis that holds almost...

    , Peru.
  • Santa Fe
    Santa Fe, Argentina
    Santa Fe is the capital city of province of Santa Fe, Argentina. It sits in northeastern Argentina, near the junction of the Paraná and Salado rivers. It lies opposite the city of Paraná, to which it is linked by the Hernandarias Subfluvial Tunnel. The city is also connected by canal with the...

     and Paraná
    Paraná, Entre Ríos
    Paraná is the capital city of the Argentine province of Entre Ríos, located on the eastern shore of the Paraná River, opposite the city of Santa Fe, capital of the neighbouring Santa Fe Province...

    , Argentina.
  • Carmen de Patagones
    Carmen de Patagones
    - Geography :It is located 937 km from the city of Buenos Aires, on the north bank of the Río Negro , near the Atlantic Ocean, and opposite Viedma, capital of the province of Río Negro...

     and Viedma, Argentina.

Australia

  • Albury
    Albury, New South Wales
    Albury is a major regional city in New South Wales, Australia, located on the Hume Highway on the northern side of the Murray River. It is located wholly within the boundaries of the City of Albury Local Government Area...

     and Wodonga
    Wodonga, Victoria
    Wodonga is a small city on the Victorian side of the border with New South Wales, north-east of Melbourne, Australia. Adjacent to Wodonga across the border is the New South Wales city of Albury. Wodonga is located wholly within the boundaries of the City of Wodonga LGA...

  • Canberra
    Canberra
    Canberra is the capital city of Australia. With a population of over 345,000, it is Australia's largest inland city and the eighth-largest city overall. The city is located at the northern end of the Australian Capital Territory , south-west of Sydney, and north-east of Melbourne...

     and Queanbeyan
  • Coolangatta
    Coolangatta, Queensland
    Coolangatta is the southernmost suburb of the Gold Coast, Queensland, Australia. It has a population of 4,869 and is named after the schooner Coolangatta which was wrecked there in 1846....

     and Tweed Heads
    Tweed Heads, New South Wales
    Tweed Heads is a town located on the Tweed River in north-eastern New South Wales, Australia in Tweed Shire. Tweed Heads is located next to the border with Queensland, adjacent to the "Twin Town" of Coolangatta, a suburb of the Gold Coast...

  • Forster
    Forster, New South Wales
    Forster is a large coastal town in the Mid North Coast region of New South Wales, Australia, in the Great Lakes Council LGA, about north-north-east of Sydney. It is immediately adjacent to its twin, Tuncurry, which is the smaller of the two towns...

     and Tuncurry
    Tuncurry, New South Wales
    Tuncurry is a coastal town in the Mid North Coast region of New South Wales, Australia, in the Great Lakes Council LGA, about north north east of Sydney. It is immediately adjacent to its twin town of Forster, which is the larger of the two towns....


Africa

  • Fes
    Fes
    Fes or Fez is the second largest city of Morocco, after Casablanca, with a population of approximately 1 million . It is the capital of the Fès-Boulemane region....

     and Meknes
    Meknes
    Meknes is a city in northern Morocco, located from the capital Rabat and from Fes. It is served by the A2 expressway between those two cities and by the corresponding railway. Meknes was the capital of Morocco under the reign of Moulay Ismail , before it was relocated to Marrakech. The...

    , Morocco
  • Kinshasa
    Kinshasa
    Kinshasa is the capital and largest city of the Democratic Republic of the Congo. The city is located on the Congo River....

    , capital of Congo DR and Brazzaville
    Brazzaville
    -Transport:The city is home to Maya-Maya Airport and a railway station on the Congo-Ocean Railway. It is also an important river port, with ferries sailing to Kinshasa and to Bangui via Impfondo...

    , capital of Republic of the Congo
  • Cairo
    Cairo
    Cairo , is the capital of Egypt and the largest city in the Arab world and Africa, and the 16th largest metropolitan area in the world. Nicknamed "The City of a Thousand Minarets" for its preponderance of Islamic architecture, Cairo has long been a centre of the region's political and cultural life...

     and Giza, Egypt
  • Harar
    Harar
    Harar is an eastern city in Ethiopia, and the capital of the modern Harari ethno-political division of Ethiopia...

     and Dire Dawa
    Dire Dawa
    Dire Dawa is one of two chartered cities in Ethiopia . This chartered city is divided administratively into two woredas, the city proper and the non-urban woreda of Gurgura....

    , Ethiopia

Fictional twin cities

  • Gotham City
    Gotham City
    Gotham City is a fictional U.S. city appearing in DC Comics, best known as the home of Batman. Batman's place of residence was first identified as Gotham City in Batman #4 . Gotham City is strongly inspired by Trenton, Ontario's history, location, atmosphere, and various architectural styles...

     (the home of Batman
    Batman
    Batman is a fictional character created by the artist Bob Kane and writer Bill Finger. A comic book superhero, Batman first appeared in Detective Comics #27 , and since then has appeared primarily in publications by DC Comics...

    ) and Metropolis
    Metropolis (comics)
    Metropolis is a fictional city that appears in comic books published by DC Comics, and is the home of Superman. Metropolis first appeared by name in Action Comics #16 ....

     (the home of Superman
    Superman
    Superman is a fictional comic book superhero appearing in publications by DC Comics, widely considered to be an American cultural icon. Created by American writer Jerry Siegel and Canadian-born American artist Joe Shuster in 1932 while both were living in Cleveland, Ohio, and sold to Detective...

    ) have sometimes been presented as twin cities, mainly in 1970s and 1980s stories by DC Comics
    DC Comics
    DC Comics, Inc. is one of the largest and most successful companies operating in the market for American comic books and related media. It is the publishing unit of DC Entertainment a company of Warner Bros. Entertainment, which itself is owned by Time Warner...

    . The two cities were shown as located on opposite sides of a large bay
    Bay
    A bay is an area of water mostly surrounded by land. Bays generally have calmer waters than the surrounding sea, due to the surrounding land blocking some waves and often reducing winds. Bays also exist as an inlet in a lake or pond. A large bay may be called a gulf, a sea, a sound, or a bight...

    .
  • Central City
    Central City (DC Comics)
    Central City is a fictional city that appears in stories published by DC Comics, and is the home of the Silver Age version of the Flash, Barry Allen. It first appeared in Showcase #4 in September-October 1956.-Location:...

     and Keystone City
    Keystone City
    Keystone City is a fictional city in the . Specifically, it is the home of both the original Flash, Jay Garrick, and the third Flash, Wally West...

    , from the current Flash
    Flash (comics)
    The Flash is a name shared by several fictional comic book superheroes from the DC Comics universe. Created by writer Gardner Fox and artist Harry Lampert, the original Flash first appeared in Flash Comics #1 ....

    comics, are shown as twin cities; earlier comics presented each city as located in the same space but on different parallel Earths
    Parallel universe (fiction)
    A parallel universe or alternative reality is a hypothetical self-contained separate reality coexisting with one's own. A specific group of parallel universes is called a "multiverse", although this term can also be used to describe the possible parallel universes that constitute reality...

    .
  • Ankh-Morpork
    Ankh-Morpork
    Ankh-Morpork is a fictional city-state which prominently features in Terry Pratchett's Discworld series of fantasy novels. As cities go, it is on the far side of corrupt and polluted, and is subject to outbreaks of comedic violence and brouhaha on a fairly regular basis...

    , from Terry Pratchett
    Terry Pratchett
    Sir Terence David John "Terry" Pratchett, OBE is an English novelist, known for his frequently comical work in the fantasy genre. He is best known for his popular and long-running Discworld series of comic fantasy novels...

    's Discworld
    Discworld
    Discworld is a comic fantasy book series by English author Sir Terry Pratchett, set on the Discworld, a flat world balanced on the backs of four elephants which, in turn, stand on the back of a giant turtle, Great A'Tuin. The books frequently parody, or at least take inspiration from, J. R. R....

    novels, is referred to as "the twin cities of proud Ankh and pestilent Morpork"
  • Duckburg and St. Canard were depicted in the cartoon Darkwing Duck
    Darkwing Duck
    DarkWing Duck is an American animated television series produced by The Walt Disney Company that ran from 1991–1992 on both the syndicated programming block The Disney Afternoon and Saturday mornings on ABC. It featured the eponymous anthropomorphic duck superhero whose alter ego is mild-mannered...

    as sister cities connected by a bridge, very similar to Oakland and San Francisco.

United States

  • In Iowa
    Iowa
    Iowa is a state located in the Midwestern United States, an area often referred to as the "American Heartland". It derives its name from the Ioway people, one of the many American Indian tribes that occupied the state at the time of European exploration. Iowa was a part of the French colony of New...

    : Cedar Rapids, Marion
    Marion, Iowa
    Marion is a city in Linn County, Iowa, United States. The population was 26,294 at the 2000 census and was estimated at 32,172 in 2007. The city is part of the Cedar Rapids Metropolitan Statistical Area.- History :...

     and Hiawatha
    Hiawatha, Iowa
    Hiawatha is a city in Linn County, Iowa, United States. It is a suburb located north of Cedar Rapids and is part of the Cedar Rapids Metropolitan Statistical Area...

  • The Tri-Cities, Washington
    Tri-Cities, Washington
    The Tri-Cities is a mid-sized metropolitan area in the southeastern part of the U.S. state of Washington, consisting of three neighboring cities: Kennewick, Pasco, and Richland. The cities are located at the confluence of the Yakima, Snake, and Columbia rivers in the semi-arid region of...

    , consisting of Richland
    Richland, Washington
    Richland is a city in Benton County in the southeastern part of the U.S. state of Washington, at the confluence of the Yakima and the Columbia Rivers. As of the 2010 census, the city population was 48,058. April 1, 2011 estimates from the Washington State Office of Financial Management put the...

    , Pasco
    Pasco, Washington
    Pasco is a city in and the county seat of Franklin County, Washington, United States.Pasco is one of three cities that make up the Tri-Cities region of the state of Washington...

    , and Kennewick
    Kennewick, Washington
    Kennewick is a city in Benton County in the southeastern part of the U.S. state of Washington, near the Hanford nuclear site. It is the most populous of the three cities collectively referred to as the Tri-Cities...

    , Washington, along the banks of the Columbia River
    Columbia River
    The Columbia River is the largest river in the Pacific Northwest region of North America. The river rises in the Rocky Mountains of British Columbia, Canada, flows northwest and then south into the U.S. state of Washington, then turns west to form most of the border between Washington and the state...

  • The Tri-Cities, Tennessee
    Tri-Cities, Tennessee
    In Tennessee and Virginia the name "Tri-Cities" refers to the region comprising the cities of Kingsport, Johnson City and Bristol and the surrounding smaller towns and communities in Northeast Tennessee and Southwest Virginia...

    , Tennessee
    Tennessee
    Tennessee is a U.S. state located in the Southeastern United States. It has a population of 6,346,105, making it the nation's 17th-largest state by population, and covers , making it the 36th-largest by total land area...

     and Virginia
    Virginia
    The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...

    , consisting of the twin cities of Bristol, Tennessee
    Bristol, Tennessee
    Bristol is a city in Sullivan County, Tennessee, United States. The population was 26,702 at the 2010 census. It is the twin city of Bristol, Virginia, which lies directly across the state line between Tennessee and Virginia. The boundaries of both cities run parallel to each other along State...

    /Bristol, Virginia
    Bristol, Virginia
    Bristol is an independent city in Virginia, United States, bounded by Washington County, Virginia, Bristol, Tennessee, and Sullivan County, Tennessee....

    , Kingsport
    Kingsport, Tennessee
    Kingsport is a city located mainly in Sullivan County with some western portions in Hawkins County in the US state of Tennessee. The majority of the city lies in Sullivan County...

    , and Johnson City
    Johnson City, Tennessee
    Johnson City is a city in Carter, Sullivan, and Washington counties in the U.S. state of Tennessee, with most of the city being in Washington County...

  • The Research Triangle in North Carolina
    North Carolina
    North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...

    , consisting of Raleigh
    Raleigh, North Carolina
    Raleigh is the capital and the second largest city in the state of North Carolina as well as the seat of Wake County. Raleigh is known as the "City of Oaks" for its many oak trees. According to the U.S. Census Bureau, the city's 2010 population was 403,892, over an area of , making Raleigh...

    , Durham
    Durham, North Carolina
    Durham is a city in the U.S. state of North Carolina. It is the county seat of Durham County and also extends into Wake County. It is the fifth-largest city in the state, and the 85th-largest in the United States by population, with 228,330 residents as of the 2010 United States census...

    , and Chapel Hill
    Chapel Hill, North Carolina
    Chapel Hill is a town in Orange County, North Carolina, United States and the home of the University of North Carolina at Chapel Hill and UNC Health Care...

    .
  • The Golden Triangle
    Golden Triangle (Texas)
    The Golden Triangle is an area of Southeast Texas between the cities of Beaumont, Port Arthur, and Orange. The "golden" refers to the wealth that came from the Spindletop oil strike in Beaumont in 1901...

     in Texas
    Texas
    Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

    , consisting of Beaumont
    Beaumont, Texas
    Beaumont is a city in and county seat of Jefferson County, Texas, United States, within the Beaumont–Port Arthur Metropolitan Statistical Area. The city's population was 118,296 at the 2010 census. With Port Arthur and Orange, it forms the Golden Triangle, a major industrial area on the...

    , Port Arthur
    Port Arthur, Texas
    -Demographics:As of the 2000 census, there were 57,755 people, 21,839 households, and 14,675 families residing in the city. The population density was 696.5 people per square mile . There were 24,713 housing units at an average density of 298.0 per square mile...

    , and Orange
    Orange, Texas
    Orange is a city in Orange County, Texas, United States. As of the 2000 census, the city population was 18,643. It is the county seat of Orange County, and is the easternmost city in Texas. Located on the Sabine River at the border with Louisiana, it is part of the Beaumont–Port Arthur...

    .
  • The Piedmont Triad
    Piedmont Triad
    The Piedmont Triad, or Triad, is a north-central region of the U.S. state of North Carolina that consists of the area within and surrounding the three major cities of Greensboro, Winston-Salem, and High Point. This close group or "triad" of cities lies in the Piedmont geographical region of the...

     in North Carolina, consisting of Greensboro
    Greensboro, North Carolina
    Greensboro is a city in the U.S. state of North Carolina. It is the third-largest city by population in North Carolina and the largest city in Guilford County and the surrounding Piedmont Triad metropolitan region. According to the 2010 U.S...

    , Winston-Salem
    Winston-Salem, North Carolina
    Winston-Salem is a city in the U.S. state of North Carolina, with a 2010 population of 229,617. Winston-Salem is the county seat and largest city of Forsyth County and the fourth-largest city in the state. Winston-Salem is the second largest municipality in the Piedmont Triad region and is home to...

     (itself a merged city), and High Point
    High Point, North Carolina
    High Point is a city located in the Piedmont Triad region of North Carolina. As of 2010 the city had a total population of 104,371, according to the US Census Bureau. High Point is currently the eighth-largest municipality in North Carolina....

    .
  • The Tri-Cities
    Tri-Cities (Michigan)
    The name Tri-Cities refers to two regions in the U.S. state of Michigan. Both are located in the Lower Peninsula.-The Greater Tri-Cities Region:The larger and more well known Tri-Cities is the region surrounding the cities of Saginaw, Bay City, and Midland...

     in Michigan, consisting of Bay City
    Bay City, Michigan
    Bay City is a city in the U.S. state of Michigan located near the base of the Saginaw Bay on Lake Huron. As of the 2010 census, the city's population was 34,932, and is the principal city of the Bay City Metropolitan Statistical Area, which is included in the Saginaw-Bay City-Saginaw Township North...

    , Saginaw
    Saginaw, Michigan
    Saginaw is a city in the U.S. state of Michigan and the seat of Saginaw County. The city of Saginaw was once a thriving lumber town and manufacturing center. Saginaw and Saginaw County lie in the Flint/Tri-Cities region of Michigan...

    , and Midland
    Midland, Michigan
    Midland is a city in the U.S. state of Michigan in the Tri-Cities region of the state. It is the county seat of Midland County. The city's population was 41,863 as of the 2010 census. It is the principal city of the Midland Micropolitan Statistical Area....

     in the Saginaw Valley
  • In Illinois
    Illinois
    Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...

     and Iowa
    Iowa
    Iowa is a state located in the Midwestern United States, an area often referred to as the "American Heartland". It derives its name from the Ioway people, one of the many American Indian tribes that occupied the state at the time of European exploration. Iowa was a part of the French colony of New...

    : three of the four Quad Cities
    Quad Cities
    The Quad Cities is a group of five cities straddling the Mississippi River on the Iowa–Illinois boundary. These cities, Davenport and Bettendorf and Rock Island, Moline, and East Moline , are the center of the Quad Cities Metropolitan Area, which, as of 2010, had an estimated population of...

    Moline
    Moline, Illinois
    Moline is a city located in Rock Island County, Illinois, United States, with a population of 45,792 in 2010. Moline is one of the Quad Cities, along with neighboring East Moline and Rock Island in Illinois and the cities of Davenport and Bettendorf in Iowa. The Quad Cities has a population of...

     and Rock Island
    Rock Island, Illinois
    Rock Island is the county seat of Rock Island County, Illinois, United States. The population was 40,884 at the 2010 census. Located on the Mississippi River, it is one of the Quad Cities, along with neighboring Moline, East Moline, and the Iowa cities of Davenport and Bettendorf. The Quad Cities...

     in Illinois and Davenport
    Davenport, Iowa
    Davenport is a city located along the Mississippi River in Scott County, Iowa, United States. Davenport is the county seat of and largest city in Scott County. Davenport was founded on May 14, 1836 by Antoine LeClaire and was named for his friend, George Davenport, a colonel during the Black Hawk...

     in Iowa—were formerly known as the Tri-Cities, before the inclusion of East Moline, Illinois
    East Moline, Illinois
    East Moline is a city in Rock Island County, Illinois, United States. The population was 20,333 at the 2000 census. East Moline is one of the five Quad Cities,, along with the cities of Rock Island, Moline, and the Iowa cities of Davenport and Bettendorf. The Quad Cities has a population of 379,690...

     and later, Bettendorf, Iowa
    Bettendorf, Iowa
    Bettendorf is a city in Scott County, Iowa, United States. Bettendorf is the fifteenth largest city in the U.S. state of Iowa and the fourth largest city in the "Quad Cities". As of the 2010 United States Census the population grew to 33,217. Bettendorf is one of the Quad Cities, along with...

  • In Kane County, Illinois
    Kane County, Illinois
    Kane County is a county located in the U.S. state of Illinois. According to the 2010 census, it has a population of 515,269, which is an increase of 27.5% from 404,119 in 2000. Its county seat is Geneva, and its largest city is Aurora.- Geography :...

    , the county seat of Geneva
    Geneva, Illinois
    Geneva is the county seat of Kane County, Illinois. It is located on the western fringe of the Chicago suburbs. As of the 2010 census, the city had a total population of 26,652. Geneva is part of a tri-city area, along with St. Charles and Batavia...

     and the nearby cities of Batavia
    Batavia, Illinois
    Batavia was founded in 1833, and is the oldest city in Kane County, Illinois, with a small portion in DuPage County. During the Industrial Revolution, Batavia became known as ‘The Windmill City’ for being the largest windmill producer of the time...

    , and St. Charles
    St. Charles, Illinois
    St. Charles is a Chicago suburb in Kane and DuPage counties of Illinois, United States, and is roughly west of Chicago on Illinois Route 64. According to a 2004 census estimate, the city has a total population of 32,134. The official city slogan is Pride of the Fox, after the Fox River that runs...

    ,
  • The Capital District
    Capital District
    New York's Capital District, also known as the Capital Region, is a region in upstate New York that generally refers to the four counties surrounding Albany, the capital of the state: Albany County, Schenectady County, Rensselaer County, and Saratoga County...

     in New York
    New York
    New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...

    , consisting of Albany
    Albany, New York
    Albany is the capital city of the U.S. state of New York, the seat of Albany County, and the central city of New York's Capital District. Roughly north of New York City, Albany sits on the west bank of the Hudson River, about south of its confluence with the Mohawk River...

    , Schenectady
    Schenectady, New York
    Schenectady is a city in Schenectady County, New York, United States, of which it is the county seat. As of the 2010 census, the city had a population of 66,135...

    , and Troy
    Troy, New York
    Troy is a city in the US State of New York and the seat of Rensselaer County. Troy is located on the western edge of Rensselaer County and on the eastern bank of the Hudson River. Troy has close ties to the nearby cities of Albany and Schenectady, forming a region popularly called the Capital...

  • In Colorado
    Colorado
    Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...

    : the towns of Firestone
    Firestone, Colorado
    Firestone is a Statutory Town in Weld County, Colorado, United States. The population was 1,908 at the 2000 census.-Geography:Firestone is located at , or about 30 miles north of Denver....

    , Frederick
    Frederick, Colorado
    Frederick is a Statutory Town in Weld County, Colorado, United States. The population was 8679 at the 2010 census.-Geography:Frederick is located at ....

    , and Dacono
    Dacono, Colorado
    The City of Dacono is a Home Rule Municipality located in Weld County, Colorado, United States. The population was 3,015 at the 2000 census.-History:...

     (known as the "tri-towns")
  • In Nebraska
    Nebraska
    Nebraska is a state on the Great Plains of the Midwestern United States. The state's capital is Lincoln and its largest city is Omaha, on the Missouri River....

    :
    • in the south-central part of the state, Grand Island
      Grand Island, Nebraska
      Grand Island is a city in and the county seat of Hall County, Nebraska, United States. The population was 48,520 at the 2010 census.Grand Island is home to the Nebraska Law Enforcement Training Center which is the sole agency responsible for training law enforcement officers throughout the state,...

      , Kearney
      Kearney, Nebraska
      Kearney is a city in and the county seat of Buffalo County, Nebraska, United States. The population was 30,787 at the 2010 census. It is home to the University of Nebraska-Kearney....

      , and Hastings
      Hastings, Nebraska
      Hastings is a city in and the county seat of Adams County, Nebraska, United States. It is the principal city of the Hastings, Nebraska Micropolitan Statistical Area, which consists of Adams and Clay counties. The population was 24,907 at the 2010 census...

    • in the panhandle, western part of the state, Gering
      Gering, Nebraska
      Gering is a city in Scotts Bluff County, Nebraska, United States. It is part of the Scottsbluff, Nebraska Micropolitan Statistical Area. The population was 7,751 at the 2000 census. It is the county seat of Scotts Bluff County....

      , Scottsbluff
      Scottsbluff, Nebraska
      Scottsbluff is a city in Scotts Bluff County, Nebraska, United States. The population was 15,039 at the 2010 census. Scottsbluff is the largest city in the Nebraska Panhandle, and the 13th largest city in Nebraska....

       and Terrytown
      Terrytown, Nebraska
      Terrytown is a village in Scotts Bluff County, Nebraska, United States. The population was 646 at the 2000 census. It is part of the Scottsbluff, Nebraska Micropolitan Statistical Area. Terrytown is located on the bank of the North Platte River between the cities of Scottsbluff and Gering, Nebraska...

       are border to border
  • Tri-Cities, Virginia
    Tri-Cities, Virginia
    The Tri-Cities of Virginia is an area in the Greater Richmond Region which includes the three independent cities of Petersburg, Colonial Heights, and Hopewell and portions of the adjoining counties of Chesterfield, Dinwiddie, and Prince George in south-central Virginia...

    , consisting of Petersburg
    Petersburg, Virginia
    Petersburg is an independent city in Virginia, United States located on the Appomattox River and south of the state capital city of Richmond. The city's population was 32,420 as of 2010, predominantly of African-American ethnicity...

    , Colonial Heights
    Colonial Heights, Virginia
    Colonial Heights is an independent city in Virginia, United States. The population was 17,411 as of 2010. The Bureau of Economic Analysis combines the City of Colonial Heights with Dinwiddie County for statistical purposes...

    , and Hopewell
    Hopewell, Virginia
    Hopewell is an independent city in the Commonwealth of Virginia. The population was 22,591 at the 2010 Census . It is in Tri-Cities area of the Richmond-Petersburg region and is a portion of the Richmond Metropolitan Statistical Area...

     in the Greater Richmond Region
  • In New Hampshire
    New Hampshire
    New Hampshire is a state in the New England region of the northeastern United States of America. The state was named after the southern English county of Hampshire. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Atlantic Ocean to the east, and the Canadian...

    : Dover
    Dover, New Hampshire
    Dover is a city in Strafford County, New Hampshire, in the United States of America. The population was 29,987 at the 2010 census, the largest in the New Hampshire Seacoast region...

    , Somersworth
    Somersworth, New Hampshire
    As of the census of 2000, there were 11,477 people, 4,687 households, and 3,079 families residing in the city. The population density was 1,173.4 people per square mile . There were 4,841 housing units at an average density of 494.9 per square mile...

    , and Rochester
    Rochester, New Hampshire
    Rochester is a city in Strafford County, New Hampshire, United States. As of the 2010 census, the city population was 29,752. The city includes the villages of East Rochester and Gonic. Rochester is home to Skyhaven Airport and the annual Rochester Fair....

     in the Seacoast Region
    Seacoast Region (New Hampshire)
    The Seacoast Region is the southeast area of the U.S. state of New Hampshire. The region stretches 18 miles along the Atlantic Ocean from New Hampshire's border with Salisbury, Massachusetts to the Piscataqua River and New Hampshire's border with Kittery, Maine. The shoreline is generally very...

  • In Florida
    Florida
    Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

    :
    • In the southeast of the state, South Florida
      South Florida metropolitan area
      The South Florida metropolitan area, also known as the Miami metropolitan area, and designated the Miami–Fort Lauderdale–Pompano Beach, FL Metropolitan Statistical Area by the U.S...

      , consisting of the anchor cities of Miami, Fort Lauderdale, and West Palm Beach. This region is sometimes referred to as the tri-county area (Dade
      Miami-Dade County, Florida
      Miami-Dade County is a county located in the southeastern part of the state of Florida. As of 2010 U.S. Census, the county had a population of 2,496,435, making it the most populous county in Florida and the eighth-most populous county in the United States...

      , Broward
      Broward County, Florida
      -2000 Census:As of the census of 2000, there were 1,623,018 people, 654,445 households, and 411,645 families residing in the county. The population density was 1,346 people per square mile . There were 741,043 housing units at an average density of 615 per square mile...

      , and Palm Beach
      Palm Beach County, Florida
      Palm Beach County is the largest county in the state of Florida in total area, and third in population. As of 2010, the county's estimated population was 1,320,134, making it the twenty-eighth most populous in the United States...

       counties)
    • On the Gulf of Mexico Coast, the Tampa Bay Area
      Tampa Bay Area
      The Tampa Bay Area is the region of west central Florida adjacent to Tampa Bay. Definitions of the region vary. It is often considered equivalent to the Tampa-St. Petersburg-Clearwater Metropolitan Statistical Area defined by the United States Census Bureau. The Census Bureau currently...

      , consisting of Tampa
      Tampa, Florida
      Tampa is a city in the U.S. state of Florida. It serves as the county seat for Hillsborough County. Tampa is located on the west coast of Florida. The population of Tampa in 2010 was 335,709....

      , Clearwater
      Clearwater, Florida
      Clearwater is a city located in Pinellas County, Florida, US, nearly due west of Tampa and northwest of St. Petersburg. In the west of Clearwater lies the Gulf of Mexico and in the east lies Tampa Bay. As of the 2000 census, the city had a total population of 108,787. It is the county seat of...

      , and St. Petersburg
      St. Petersburg, Florida
      St. Petersburg is a city in Pinellas County, Florida, United States. It is known as a vacation destination for both American and foreign tourists. As of 2008, the population estimate by the U.S. Census Bureau is 245,314, making St...

  • In Oklahoma
    Oklahoma
    Oklahoma is a state located in the South Central region of the United States of America. With an estimated 3,751,351 residents as of the 2010 census and a land area of 68,667 square miles , Oklahoma is the 28th most populous and 20th-largest state...

    : Tuttle
    Tuttle, Oklahoma
    Tuttle is a city in Grady County, Oklahoma, United States. The population was 4,294 at the 2000 census.Tuttle is a largely agricultural community with a focus on wheat, cotton, corn, alfalfa hay, Bermuda grass hay, and cattle. Nearby Braum's Dairy, the largest farm in the area, is located just...

    , Newcastle
    Newcastle, Oklahoma
    Newcastle is the largest city in McClain County, Oklahoma, United States, and a part of the Oklahoma City Metropolitan Area. The population was 7,685 at the 2010 census.-Geography:Newcastle is located at ....

    , and Blanchard
    Blanchard, Oklahoma
    Blanchard is a city in Grady and McClain counties in the U.S. state of Oklahoma. The population was 7,670 at the 2010 census. Blanchard is part of a rapidly growing area of northern McClain and Grady Counties known as the "Tri-City Area" with Newcastle and Tuttle.-Early history:Blanchard is...

     (sometimes with the town of Bridge Creek
    Bridge Creek, Oklahoma
    Bridge Creek is a town in Grady County, Oklahoma, United States. As of the 2006 US Census estimate, the town is estimated to have a total population of 340.-Geography:Bridge Creek is located at ....

    )
  • In California:
    • In Alameda County
      Alameda County, California
      Alameda County is a county in the U.S. state of California. It occupies most of the East Bay region of the San Francisco Bay Area. As of the 2010 census it had a population of 1,510,271, making it the 7th most populous county in the state...

      : Fremont
      Fremont, California
      Fremont is a city in Alameda County, California. It was incorporated on January 23, 1956, from the merger of five smaller communities: Centerville, Niles, Irvington, Mission San Jose, and Warm Springs...

      , Newark
      Newark, California
      Newark is a city in Alameda County, California, United States. It was incorporated as a city in September 1955. Newark is an enclave, completely surrounded by the city of Fremont. Its population was 42,573 at the 2010 census.-Geography:...

      , and Union City
      Union City, California
      Union City is a city in Alameda County, California, United States. It was incorporated in 1959, combining the communities of Alvarado and Decoto. Alvarado was the original county seat of Alameda County, and the site of the first county courthouse is a California Historical Landmark . The city...

       are referred to as the Tri-City Area.
    • In Santa Barbara County
      Santa Barbara County, California
      Santa Barbara County is a county located in the southern portion of the U.S. state of California, on the Pacific coast. As of 2010 the county had a population of 423,895. The county seat is Santa Barbara and the largest city is Santa Maria.-History:...

      : Santa Barbara
      Santa Barbara, California
      Santa Barbara is the county seat of Santa Barbara County, California, United States. Situated on an east-west trending section of coastline, the longest such section on the West Coast of the United States, the city lies between the steeply-rising Santa Ynez Mountains and the Pacific Ocean...

      , Goleta
      Goleta, California
      Goleta is a city in southern Santa Barbara County, California, USA. It was incorporated as a city in 2002, after a long period as the largest unincorporated, populated area in the county. As of the 2000 census, the Census-designated place had a total population of 55,204, however, a significant...

      , and Carpinteria
      Carpinteria, California
      Carpinteria is a small oceanside city located in southeastern Santa Barbara County, California, east of Santa Barbara and northwest of Ventura. The population was 13,040 at the 2010 census, down from 14,194 at the 2000 census....

      , sometimes referred collectively as the South Coast. The term 'tri-cities' is only rarely used as a reference to them, and is considered somewhat old.
    • In San Diego County
      San Diego County, California
      San Diego County is a large county located in the southwestern corner of the US state of California. Hence, San Diego County is also located in the southwestern corner of the 48 contiguous United States. Its county seat and largest city is San Diego. Its population was about 2,813,835 in the 2000...

      : Oceanside
      Oceanside, California
      -2010:The 2010 United States Census reported that Oceanside had a population of 167,086. The population density was 3,961.8 people per square mile...

      , Vista
      Vista, California
      Vista is a city in north San Diego County, California. It was incorporated January 28, 1963 and became a charter city on June 13, 2007. Located just seven miles inland from the Pacific Ocean in northern San Diego County, the City of Vista has a Mediterranean climate...

      , and Carlsbad
      Carlsbad, California
      -2010:The 2010 United States Census reported that Carlsbad had a population of 105,328. The population density was 2,693.1 people per square mile . The racial makeup of Carlsbad was 87,205 White, 1,379 African American, 514 Native American, 7,460 Asian, 198 Pacific Islander, 4,189 from other...

       are sometimes referred to as the tri-cities.
  • The Triple Cities in New York: Binghamton
    Binghamton, New York
    Binghamton is a city in the Southern Tier of New York in the United States. It is near the Pennsylvania border, in a bowl-shaped valley at the confluence of the Susquehanna and Chenango Rivers...

    , Endicott
    Endicott, New York
    Endicott is a village in Broome County, New York, United States. The population was 13,038 at the 2000 census. It is part of the Binghamton Metropolitan Statistical Area. The village is named after Henry B...

     and Johnson City
    Johnson City, New York
    Johnson City is a village in Broome County, New York, United States. The population was 15,535 at the 2000 census. It is part of the Binghamton Metropolitan Statistical Area....

  • The Lehigh Valley
    Lehigh Valley
    The Lehigh Valley, known officially by the United States Census Bureau as the Allentown-Bethlehem-Easton, PA-NJ metropolitan area and referred to locally as The Valley and A-B-E, is a metropolitan region consisting of Lehigh, Northampton, Berks, and Carbon counties in eastern Pennsylvania and...

     in Pennsylvania
    Pennsylvania
    The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...

    : Allentown
    Allentown, Pennsylvania
    Allentown is a city located in Lehigh County, Pennsylvania, in the United States. It is Pennsylvania's third most populous city, after Philadelphia and Pittsburgh, and the 215th largest city in the United States. As of the 2010 census, the city had a total population of 118,032 and is currently...

    , Bethlehem
    Bethlehem, Pennsylvania
    Bethlehem is a city in Lehigh and Northampton Counties in the Lehigh Valley region of eastern Pennsylvania, in the United States. As of the 2010 census, the city had a total population of 74,982, making it the seventh largest city in Pennsylvania, after Philadelphia, Pittsburgh, Allentown, Erie,...

    , and Easton
    Easton, Pennsylvania
    Easton is a city in Northampton County, Pennsylvania, United States. The population was 26,800 as of the 2010 census. It is the county seat of Northampton County....

  • In Alabama
    Alabama
    Alabama is a state located in the southeastern region of the United States. It is bordered by Tennessee to the north, Georgia to the east, Florida and the Gulf of Mexico to the south, and Mississippi to the west. Alabama ranks 30th in total land area and ranks second in the size of its inland...

    : Huntsville
    Huntsville, Alabama
    Huntsville is a city located primarily in Madison County in the central part of the far northern region of the U.S. state of Alabama. Huntsville is the county seat of Madison County. The city extends west into neighboring Limestone County. Huntsville's population was 180,105 as of the 2010 Census....

    , Decatur
    Decatur, Alabama
    Decatur is a city in Limestone and Morgan Counties in the U.S. state of Alabama. The city, affectionately known as "The River City", is located in Northern Alabama on the banks of Wheeler Lake, along the Tennessee River. It is the largest city and county seat of Morgan County...

    , and Athens
    Athens, Alabama
    Athens is a city in Limestone County, Alabama, United States. As of the 2000 census, the population of the city is 18,967. According to the 2009 U.S. Census estimates, the city had a population of 24,234...


Canada

  • Tri-Cities (British Columbia)
    Tri-Cities (British Columbia)
    The Tri-Cities is an informal term used to describe three adjacent suburban cities in the north-east sector of Metro Vancouver in British Columbia. Combined, these five communities have a 2008 population of 211,418 residents:-Other terms:...

    , consisting of Coquitlam, Port Coquitlam, and Port Moody, located in the north-eastern section of Metro Vancouver.
  • Penetanguishene, Victoria Harbour, Midland
    Midland, Ontario
    Midland is a town located on Georgian Bay in Simcoe County, Ontario, Canada.Situated at the southern end of Georgian Bay's 30,000 Islands, Midland is the economic centre of the region, with a 125-bed hospital and a local airport. It is the main town of the southern Georgian Bay area...

    , and Port McNicoll
    Port McNicoll, Ontario
    Port McNicoll is a community in the Canadian province of Ontario. It is located in the Simcoe County township of Tay.-Busy terminal:The community of Port McNicoll was established in 1908 as a Great Lakes port on the southern shores of Georgian Bay...

    , Ontario
    Ontario
    Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

    .
  • Ingersoll
    Ingersoll, Ontario
    Ingersoll is a town in Oxford County on the Thames River in southwestern Ontario, Canada. The nearest cities are Woodstock to the east and London to the west....

    , Tillsonburg and Woodstock
    Woodstock, Ontario
    Woodstock is a city and the county seat of Oxford County in Southern Ontario, Canada. Woodstock is located 128 km southwest of Toronto, north of Highway 401 along the historic Thames River...

    , Ontario.
  • Kitchener
    Kitchener, Ontario
    The City of Kitchener is a city in Southern Ontario, Canada. It was the Town of Berlin from 1854 until 1912 and the City of Berlin from 1912 until 1916. The city had a population of 204,668 in the Canada 2006 Census...

    , Waterloo
    Waterloo, Ontario
    Waterloo is a city in Southern Ontario, Canada. It is the smallest of the three cities in the Regional Municipality of Waterloo, and is adjacent to the city of Kitchener....

    , and Cambridge
    Cambridge, Ontario
    Cambridge is a city located in Southern Ontario at the confluence of the Grand and Speed rivers in the Regional Municipality of Waterloo, Ontario, Canada. It is an amalgamation of the City of Galt, the towns of Preston and Hespeler, and the hamlet of Blair.Galt covers the largest portion of...

    , Ontario. (Cambridge, Ontario, itself is the "tri-city" amalgamation
    Amalgamation (politics)
    A merger or amalgamation in a political or administrative sense is the combination of two or more political or administrative entities such as municipalities , counties, districts, etc. into a single entity. This term is used when the process occurs within a sovereign entity...

     of the City of Galt, and the towns of Preston
    Preston, Ontario
    Preston is a community in Cambridge, Ontario, Canada. Prior to its amalgamation with the city of Galt, the town of Hespeler and the village of Blair to form the new city in 1973, it was an independent town. It is located near the confluence of the Grand River and Speed River...

     and Hespeler
    Hespeler, Ontario
    Hespeler is a town and community located in Cambridge, Ontario, Canada on the Speed River.- History :In 1830, Joseph Oberholtzer purchased land along the Speed River. The settlement that followed was to become known as New Hope. In 1845, Jacob Hespeler arrived in New Hope. Hespeler purchased land...

    , and the hamlet of Blair in 1973.)

Mexico

  • Torreón
    Torreón
    Torreón is a city and seat of the surrounding municipality of the same name in the Mexican state of Coahuila. As of 2010, the city's population was 608,836 with 639,629 in the municipality. The metropolitan population, including Matamoros, Coahuila, and Gómez Palacio and Lerdo in adjacent Durango,...

    , Coahuila, Gómez Palacio and Lerdo, Durango — see also Comarca Lagunera
    Comarca Lagunera
    The Comarca Lagunera is the 9th largest metropolitan area in Mexico, and is located between two states, Coahuila and Durango.-Geography:The Comarca Lagunera is formed by 15 municipios; 5 in Coahuila The Comarca Lagunera is the 9th largest metropolitan area in Mexico, and is located between two...

  • Monterrey
    Monterrey
    Monterrey , is the capital city of the northeastern state of Nuevo León in the country of Mexico. The city is anchor to the third-largest metropolitan area in Mexico and is ranked as the ninth-largest city in the nation. Monterrey serves as a commercial center in the north of the country and is the...

     and San Nicolás de los Garza
    San Nicolás de los Garza
    San Nicolás de los Garza, sometimes known only as San Nicolás, is a city and coextensive municipality in the Mexican state of Nuevo León that is part of the Monterrey Metropolitan area. It has become primarily a city for residencies and family houses, although it still has several factories that...

    , Nuevo León
  • Monterrey
    Monterrey
    Monterrey , is the capital city of the northeastern state of Nuevo León in the country of Mexico. The city is anchor to the third-largest metropolitan area in Mexico and is ranked as the ninth-largest city in the nation. Monterrey serves as a commercial center in the north of the country and is the...

     and San Pedro Garza García
    San Pedro Garza García
    San Pedro Garza García is a city-municipality of the Mexican state of Nuevo León and is part of Monterrey's Metropolitan Area, based on the suburban North American model...

  • Monterrey
    Monterrey
    Monterrey , is the capital city of the northeastern state of Nuevo León in the country of Mexico. The city is anchor to the third-largest metropolitan area in Mexico and is ranked as the ninth-largest city in the nation. Monterrey serves as a commercial center in the north of the country and is the...

     and Guadalupe, Nuevo León
    Guadalupe, Nuevo León
    Guadalupe is a city and surrounding municipality located in the state of Nuevo León, in northern Mexico. It is part of the Greater Monterrey Metropolitan area....

  • Monterrey
    Monterrey
    Monterrey , is the capital city of the northeastern state of Nuevo León in the country of Mexico. The city is anchor to the third-largest metropolitan area in Mexico and is ranked as the ninth-largest city in the nation. Monterrey serves as a commercial center in the north of the country and is the...

     and Escobedo, Nuevo León
  • Monterrey
    Monterrey
    Monterrey , is the capital city of the northeastern state of Nuevo León in the country of Mexico. The city is anchor to the third-largest metropolitan area in Mexico and is ranked as the ninth-largest city in the nation. Monterrey serves as a commercial center in the north of the country and is the...

     and Santa Catarina, Nuevo León
    Santa Catarina, Nuevo León
    Santa Catarina is a city and municipality in the state of Nuevo León, Mexico that is part of the Monterrey Metropolitan area.-History:The name of this city comes from the Catholic Saint Catherine of Alexandria....

  • Saltillo
    Saltillo
    Saltillo is the capital city of the northeastern Mexican state of Coahuila and the municipal seat of the municipality of the same name. The city is located about 400 km south of the U.S. state of Texas, and 90 km west of Monterrey, Nuevo León....

     and Ramos Arizpe
    Ramos Arizpe
    Ramos Arizpe is a city and seat of the surrounding municipality of the same name in the Mexican state of Coahuila. Ramos Arizpe is located 11 km from the state capital of Saltillo. It is part of the Saltillo metropolitan area. The city reported a population of 48,228 in the 2005 census; the...

    , Coahuila
  • Piedras Negras, Coahuila
    Piedras Negras, Coahuila
    -Natural Resources:This region generates a large amount of the national production of coal, one of the most economically important non-metallic minerals in the state.-Tourism:Piedras Negras' main tourist attractions are:...

     and Eagle Pass, Texas
    Eagle Pass, Texas
    Eagle Pass is a city in and the county seat of Maverick County The population was 27,183 as of the 2010 census.Eagle Pass borders the city of Piedras Negras, Coahuila, Mexico, which is to the southwest and across the Rio Grande. The Eagle Pass-Piedras Negras Metropolitan Area is one of six...

  • Ciudad Acuña
    Ciudad Acuña
    Ciudad Acuña, also known simply as Acuña, is a city located in the Mexican state of Coahuila, at and a mean height above sea level of 271 meters...

    , Coahuila and Del Rio, Texas
    Del Rio, Texas
    Del Rio is a border city in and the county seat of Val Verde County, Texas, United States.. Del Rio is connected with Ciudad Acuña via the Lake Amistad Dam International Crossing and Del Río-Ciudad Acuña International Bridge...


Asia

  • Arcot, Ranipet
    Ranipet
    Ranipet, Vellore is a locality and part of Vellore city in the state of Tamil Nadu in southern India. It is a medium-sized community located about 26 kilometers from the Vellore city center and 100 kilometers from Chennai, the fourth largest urban area in India...

     and Walajapet
    Walajapet
    Walajapet is a locality and part of Vellore district in the state of Tamil Nadu. The streets in the town forms square shape which is unique feature of the town. It will be easy for you to reach any part of the town with this kind of infra structure...

     towns in Tamil Nadu
    Tamil Nadu
    Tamil Nadu is one of the 28 states of India. Its capital and largest city is Chennai. Tamil Nadu lies in the southernmost part of the Indian Peninsula and is bordered by the union territory of Pondicherry, and the states of Kerala, Karnataka, and Andhra Pradesh...

  • Warangal
    Warangal
    Warangal is a city and a municipal corporation in Warangal district in the Indian state of Andhra Pradesh. Warangal is located northeast of the state capital of Hyderabad and is the administrative headquarters of Warangal District. This district is a combination of three cities: Warangal,...

     in India, Andhra Pradesh
    Andhra Pradesh
    Andhra Pradesh , is one of the 28 states of India, situated on the southeastern coast of India. It is India's fourth largest state by area and fifth largest by population. Its capital and largest city by population is Hyderabad.The total GDP of Andhra Pradesh is $100 billion and is ranked third...

     consists of the towns of Warangal
    Warangal
    Warangal is a city and a municipal corporation in Warangal district in the Indian state of Andhra Pradesh. Warangal is located northeast of the state capital of Hyderabad and is the administrative headquarters of Warangal District. This district is a combination of three cities: Warangal,...

    , Hanamakonda
    Hanamakonda
    Hanumakonda is a town in Warangal district in Andhra Pradesh, India.Hanumakonda is situated between Kazipet and Warangal. It is also known as "Hanmakonda" and "Hanamkonda"...

    , and Kazipet
    Kazipet
    Kazipet is a town in Warangal district, Andhra Pradesh, India, one of the tri-cities of Warangal-Hanamakonda-Kazipet. It is known for its religious diversity, with a population composed of Hindus, Christians, Muslims, and that's about it...

    .
  • The second Tricity
    Tricity
    Tricity is an urban area consisting of three Polish cities: Gdańsk, Gdynia and Sopot. They are situated adjacent to one other, in a row, on the coast of the Gdańsk Bay, Baltic Sea, in Pomerelia , northern Poland...

     in North India
    North India
    North India, known natively as Uttar Bhārat or Shumālī Hindustān , is a loosely defined region in the northern part of India. The exact meaning of the term varies by usage...

     consists of the towns of Chandigarh
    Chandigarh
    Chandigarh is a union territory of India that serves as the capital of two states, Haryana and Punjab. The name Chandigarh translates as "The Fort of Chandi". The name is from an ancient temple called Chandi Mandir, devoted to the Hindu goddess Chandi, in the city...

    , Panchkula
    Panchkula
    Panchkula is a planned city in Panchkula district, Haryana, India. It is a satellite city of the Union Territory of Chandigarh. It also shares seamless border with Mohali district in Punjab. The prestigious Chandimandir Cantonment Headquarters of the Indian Army Western Command, is also located in...

     and SAS Nagar (Mohali
    Mohali
    Mohali is a city adjacent to Chandigarh, 18th District in Punjab, India. It is officially named after the eldest son of Guru Gobind Singh, Sahibzada Ajit Singh . It, along with Chandigarh and Panchkula, form a part of the Chandigarh Tricity...

    ).
  • Tricity
    Tricity, Nepal
    The Tricity is an area of Nepal that comprises the cities of Baglung, Beni and Kushma. All of these cities are the headquarters of their respective districts...

     of Nepal consists of the cities of Baglung
    Baglung
    Baglung, is a town in western Nepal, 275 km west of Kathmandu. It is the administrative headquarters of Baglung District and Dhawalagiri Zone. Baglung is a major business, financial, educational, and healthcare center for the people of Kali Gandaki valley....

    , Beni and Kusma
    Kusma, Nepal
    Kusma is the headquarter of Parbat District, one of a district among 75 districts in Nepal, which lies in the western part of Nepal just about 57 Km away from one of a famous city of Nepal, Pokhara. Kusma falls under Western Development Region and Dhaoolagiri Zone of Nepal.It is located at...

     along with several towns and villages along the Kali Gandaki valley.
  • Dhahran, Dammam and Khobar in Saudi Arabia

South America

  • Near Iguazu Falls
    Iguazu Falls
    Iguazu Falls, Iguassu Falls, or Iguaçu Falls are waterfalls of the Iguazu River located on the border of the Brazilian State of Paraná and the Argentine Province of Misiones. The falls divide the river into the upper and lower Iguazu. The Iguazu River originates near the city of Curitiba. It flows...

    : Foz do Iguaçu
    Foz do Iguaçu
    Foz do Iguaçu is the 7th largest city in Paraná state, Brazil, with a population of 255,900 inhabitants. It is located approximately 650 km west of Curitiba, Parana's capital city, being the westernmost city in that state...

    , Brazil, Ciudad del Este
    Ciudad del Este
    Ciudad del Este is the second largest city in Paraguay and capital of Alto Paraná department, located at the Rio Paraná....

    , Paraguay, and Puerto Iguazu
    Puerto Iguazú
    Puerto Iguazú is a frontier city in the province of Misiones, Argentina. With a population of 82.227 ,it is the fifth largest city in the Province, after Posadas, Oberá, Eldorado and San Vicente....

    , Argentina.

Europe

  • The Tricity in Poland consists of Gdańsk
    Gdansk
    Gdańsk is a Polish city on the Baltic coast, at the centre of the country's fourth-largest metropolitan area.The city lies on the southern edge of Gdańsk Bay , in a conurbation with the city of Gdynia, spa town of Sopot, and suburban communities, which together form a metropolitan area called the...

    , Gdynia
    Gdynia
    Gdynia is a city in the Pomeranian Voivodeship of Poland and an important seaport of Gdańsk Bay on the south coast of the Baltic Sea.Located in Kashubia in Eastern Pomerania, Gdynia is part of a conurbation with the spa town of Sopot, the city of Gdańsk and suburban communities, which together...

     and Sopot
    Sopot
    Sopot is a seaside town in Eastern Pomerania on the southern coast of the Baltic Sea in northern Poland, with a population of approximately 40,000....

  • The cities of Oxford
    Oxford
    The city of Oxford is the county town of Oxfordshire, England. The city, made prominent by its medieval university, has a population of just under 165,000, with 153,900 living within the district boundary. It lies about 50 miles north-west of London. The rivers Cherwell and Thames run through...

    , Cambridge
    Cambridge
    The city of Cambridge is a university town and the administrative centre of the county of Cambridgeshire, England. It lies in East Anglia about north of London. Cambridge is at the heart of the high-technology centre known as Silicon Fen – a play on Silicon Valley and the fens surrounding the...

     and London
    London
    London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

     are sometimes considered as a tricity of scientific excellence connected by good rail or road connections.

Quad cities

  • In Iowa
    Iowa
    Iowa is a state located in the Midwestern United States, an area often referred to as the "American Heartland". It derives its name from the Ioway people, one of the many American Indian tribes that occupied the state at the time of European exploration. Iowa was a part of the French colony of New...

    : Iowa City, Coralville, University Heights
    University Heights, Iowa
    University Heights is a city in Johnson County, Iowa, United States. It part of the Iowa City, Iowa Metropolitan Statistical Area. The population was 987 at the 2000 census. It is completely surrounded by Iowa City, located near the campus of the University of Iowa...

     and North Liberty
    North Liberty, Iowa
    North Liberty is a city in Johnson County, Iowa, United States. It is a suburb of Iowa City and part of the Iowa City Metropolitan Statistical Area....

  • In North Carolina
    North Carolina
    North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...

    , the Unifour: Hickory
    Hickory, North Carolina
    Hickory is a city in Catawba County, North Carolina. Hickory has the 162nd largest urban area in the United States. As of the 2000 census, the Metropolitan Statistical Area had a population of 341,851, making it the 4th largest metropolitan area in North Carolina. The city's population was 37,222...

    , Lenoir
    Lenoir, North Carolina
    Lenoir is a city in Caldwell County, North Carolina, United States. The population was 18,228 at the 2010 census. It is the county seat of Caldwell County. Lenoir is located in the Blue Ridge foothills. The city also contains the Brushy Mountains, a spur of the Blue Ridge Mountains...

    , Morganton
    Morganton, North Carolina
    Morganton is a city in Burke County, North Carolina, United States. Reader's Digest included Morganton in its list of top ten places to raise a family. The town was recently profiled in The 50 Best Small Southern Towns. The population was 17,310 at the 2000 census...

     and Alexander County
    Alexander County, North Carolina
    -Demographics:As of the census of 2000, there were 33,603 people, 13,137 households, and 9,747 families residing in the county. The population density was 129 people per square mile . There were 14,098 housing units at an average density of 54 per square mile...

  • The Quad Cities of Ontario, Canada include Kitchener
    Kitchener, Ontario
    The City of Kitchener is a city in Southern Ontario, Canada. It was the Town of Berlin from 1854 until 1912 and the City of Berlin from 1912 until 1916. The city had a population of 204,668 in the Canada 2006 Census...

    , Waterloo
    Waterloo, Ontario
    Waterloo is a city in Southern Ontario, Canada. It is the smallest of the three cities in the Regional Municipality of Waterloo, and is adjacent to the city of Kitchener....

    , Cambridge
    Cambridge, Ontario
    Cambridge is a city located in Southern Ontario at the confluence of the Grand and Speed rivers in the Regional Municipality of Waterloo, Ontario, Canada. It is an amalgamation of the City of Galt, the towns of Preston and Hespeler, and the hamlet of Blair.Galt covers the largest portion of...

    , and Guelph
    Guelph, Ontario
    Guelph is a city in Southwestern Ontario, Canada. Known as "The Royal City", Guelph is roughly east of Waterloo and west of downtown Toronto at the intersection of Highway 6 and Highway 7. It is the seat of Wellington County, but is politically independent of it...

    , Ontario
    Ontario
    Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

    .
  • Quad Cities
    Quad Cities
    The Quad Cities is a group of five cities straddling the Mississippi River on the Iowa–Illinois boundary. These cities, Davenport and Bettendorf and Rock Island, Moline, and East Moline , are the center of the Quad Cities Metropolitan Area, which, as of 2010, had an estimated population of...

     of Davenport
    Davenport, Iowa
    Davenport is a city located along the Mississippi River in Scott County, Iowa, United States. Davenport is the county seat of and largest city in Scott County. Davenport was founded on May 14, 1836 by Antoine LeClaire and was named for his friend, George Davenport, a colonel during the Black Hawk...

     and Bettendorf
    Bettendorf, Iowa
    Bettendorf is a city in Scott County, Iowa, United States. Bettendorf is the fifteenth largest city in the U.S. state of Iowa and the fourth largest city in the "Quad Cities". As of the 2010 United States Census the population grew to 33,217. Bettendorf is one of the Quad Cities, along with...

    , Iowa
    Iowa
    Iowa is a state located in the Midwestern United States, an area often referred to as the "American Heartland". It derives its name from the Ioway people, one of the many American Indian tribes that occupied the state at the time of European exploration. Iowa was a part of the French colony of New...

    , and Rock Island
    Rock Island, Illinois
    Rock Island is the county seat of Rock Island County, Illinois, United States. The population was 40,884 at the 2010 census. Located on the Mississippi River, it is one of the Quad Cities, along with neighboring Moline, East Moline, and the Iowa cities of Davenport and Bettendorf. The Quad Cities...

     and Moline
    Moline, Illinois
    Moline is a city located in Rock Island County, Illinois, United States, with a population of 45,792 in 2010. Moline is one of the Quad Cities, along with neighboring East Moline and Rock Island in Illinois and the cities of Davenport and Bettendorf in Iowa. The Quad Cities has a population of...

    , Illinois
    Illinois
    Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...

    . It also includes a fifth member, East Moline, Illinois
    East Moline, Illinois
    East Moline is a city in Rock Island County, Illinois, United States. The population was 20,333 at the 2000 census. East Moline is one of the five Quad Cities,, along with the cities of Rock Island, Moline, and the Iowa cities of Davenport and Bettendorf. The Quad Cities has a population of 379,690...

    .
  • The Florence-Muscle Shoals Metropolitan Area in Alabama is locally referred to as "the Quad Cities", with Florence
    Florence, Alabama
    Florence is the county seat of Lauderdale County, Alabama, United States, in the northwestern corner of the state.According to the 2005 Census Bureau estimates, the city's population was 36,721....

    , Muscle Shoals
    Muscle Shoals, Alabama
    Muscle Shoals is a city in Colbert County, Alabama, United States. As of 2007, the United States Census Bureau estimated the population of the city to be 12,846. The city is included in The Shoals MSA. It is famous for its contributions to American popular music.-Geography:Muscle Shoals is located...

    , Sheffield
    Sheffield, Alabama
    Sheffield is a city in Colbert County, Alabama, United States, and is included in The Shoals MSA. As of the 2000 census, the population of the city is 9,652. Sheffield is the birthplace of notable attorney, actor, former senator and presidential contender Fred Thompson...

    , and Tuscumbia
    Tuscumbia, Alabama
    Tuscumbia is a city in and the county seat of Colbert County, Alabama, United States. As of the 2010 census, the population was 8,423 and is included in The Shoals MSA....

    . Formerly, when Muscle Shoals was a mere village, this region was known a "Tri-Cities", Alabama. Actually, they are all incorporated as towns except for Florence.
  • The Quad Cities
    Quad Cities (Minnesota)
    The Quad Cities in the U.S. state of Minnesota consist of the cities of Virginia, Eveleth, Gilbert, and Mountain Iron; located in the Arrowhead Region, overlapping Iron Range region, and St. Louis County.U.S. Highway 53, U.S...

     of Minnesota consist of Virginia
    Virginia, Minnesota
    As of the census of 2000, there were 9,157 people, 4,333 households, and 2,270 families residing in the city. The population density was 486.1 people per square mile . There were 4,692 housing units at an average density of 249.1 per square mile...

    , Eveleth
    Eveleth, Minnesota
    As of the census of 2000, there were 3,865 people, 1,717 households, and 971 families residing in the city. The population density was 611.0 people per square mile . There were 1,965 housing units at an average density of 310.6 per square mile...

    , Gilbert
    Gilbert, Minnesota
    As of the census of 2000, there were 1,847 people, 842 households, and 495 families residing in the city. The population density was 156.7 people per square mile . There were 900 housing units at an average density of 76.3 per square mile...

    , and Mountain Iron
    Mountain Iron, Minnesota
    As of the census of 2000, there were 2,999 people, 1,326 households, and 847 families residing in the city. The population density was 60.7 people per square mile . There were 1,409 housing units at an average density of 28.5 per square mile...

    .
  • Pattaya-Chonburi Metropolitan Area
    Pattaya-Chonburi Metropolitan Area
    Pattaya-Chonburi metropolitan area is a conurbanation in Chonburi Province of Thailand. It comprises Pattaya City, eight town municipalities, and 25 township municipalities in eight districts with 1,183,604 registered inhabitants as of 2010...

     consists of the City of Pattaya
    Pattaya
    Pattaya is a city in Thailand, located on the east coast of the Gulf of Thailand, about 165 km southeast of Bangkok located within but not part of Amphoe Bang Lamung in the province of Chonburi....

    , Town of Chonburi
    Chonburi (city)
    Chonburi is the capital of Chonburi Province in Thailand. It is located about 100km east of Bangkok, on the coast to the Gulf of Thailand. The name means city of water.Chonburi has had town status since 1935.-External links:...

    , Portal town of Laem Chabang
    Laem Chabang
    Laem Chabang is a city in Chonburi Province, Thailand. It covers the tambon Bang Lamung of Bang Lamung district, and the complete tambon Bueng, Sura Sak, Thung Su Khla and parts of Nong Kham of Si Racha district...

     and Town of Sattahip on the west coast of Chonburi Province
    Chonburi Province
    Chonburi is a province of Thailand. Neighboring provinces are Chachoengsao, Chanthaburi and Rayong. To the west is the Gulf of Thailand. The eastern seaboard is heavily industrialized and underpinned by shipping, transportation, tourism, and manufacturing industries, and second to only Bangkok...

    , Thailand

Europe

  • London
    London
    London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

     grew from its cores in the City of London
    City of London
    The City of London is a small area within Greater London, England. It is the historic core of London around which the modern conurbation grew and has held city status since time immemorial. The City’s boundaries have remained almost unchanged since the Middle Ages, and it is now only a tiny part of...

     and the City of Westminster
    City of Westminster
    The City of Westminster is a London borough occupying much of the central area of London, England, including most of the West End. It is located to the west of and adjoining the ancient City of London, directly to the east of the Royal Borough of Kensington and Chelsea, and its southern boundary...

     to encompass many other towns and villages.
  • Budapest
    Budapest
    Budapest is the capital of Hungary. As the largest city of Hungary, it is the country's principal political, cultural, commercial, industrial, and transportation centre. In 2011, Budapest had 1,733,685 inhabitants, down from its 1989 peak of 2,113,645 due to suburbanization. The Budapest Commuter...

     is the amalgamation of Buda
    Buda
    For detailed information see: History of Buda CastleBuda is the western part of the Hungarian capital Budapest on the west bank of the Danube. The name Buda takes its name from the name of Bleda the Hun ruler, whose name is also Buda in Hungarian.Buda comprises about one-third of Budapest's...

    , Pest
    Pest (city)
    Pest is the eastern, mostly flat part of Budapest, Hungary, comprising about two thirds of the city's territory. It is divided from Buda, the other part of Budapest, by the Danube River. Among its most notable parts are the Inner City, including the Hungarian Parliament, Heroes' Square and...

     and Óbuda
    Óbuda
    Óbuda was a historical city in Hungary. United with Buda and Pest in 1873 it now forms part of District III-Óbuda-Békásmegyer of Budapest. The name means Old Buda in Hungarian...

    .
  • Berlin
    Berlin
    Berlin is the capital city of Germany and is one of the 16 states of Germany. With a population of 3.45 million people, Berlin is Germany's largest city. It is the second most populous city proper and the seventh most populous urban area in the European Union...

     (Berlin and Cölln
    Cölln
    In the 13th century Cölln was the sister town of Old Berlin , located on the southern Spree Island in the Margraviate of Brandenburg. Today the island is located in the historic core of the central Mitte locality of modern Berlin...

    ), in Germany
  • Duisburg
    Duisburg
    - History :A legend recorded by Johannes Aventinus holds that Duisburg, was built by the eponymous Tuisto, mythical progenitor of Germans, ca. 2395 BC...

     (Duisburg and Hamborn, 1929–1935 called Duisburg-Hamborn), in North Rhine-Westphalia, Germany
  • Wuppertal
    Wuppertal
    Wuppertal is a city in North Rhine-Westphalia, Germany. It is located in and around the Wupper river valley, and is situated east of the city of Düsseldorf and south of the Ruhr area. With a population of approximately 350,000, it is the largest city in the Bergisches Land...

     (Barmen
    Barmen
    Barmen is a former industrial metropolis of the region of Bergisches Land, Germany, which in 1929 with four other towns was merged with the city of Wuppertal, North Rhine-Westphalia. Barmen was the birth-place of Friedrich Engels and together with the neighbouring town of Elberfeld founded the...

     and Elberfeld
    Elberfeld
    Elberfeld is a municipal subdivision of the German city of Wuppertal; it was an independent town until 1929.-History:The first official mentioning of the geographic area on the banks of today's Wupper River as "elverfelde" was in a document of 1161...

    ), in North Rhine-Westphalia, Germany
  • Zagreb
    Zagreb
    Zagreb is the capital and the largest city of the Republic of Croatia. It is in the northwest of the country, along the Sava river, at the southern slopes of the Medvednica mountain. Zagreb lies at an elevation of approximately above sea level. According to the last official census, Zagreb's city...

     grew from the twin towns of Gradec
    Gradec
    Gradec or Gradets – South Slavic for "small town" – may refer to:* In Croatia:** Gradec, Zagreb, a neighborhood** Gradec, Zagreb County, a village and a municipality* In Slovenia:** Dobrova-Polhov Gradec...

     and Kaptol
    Kaptol
    Kaptol can refer to:* Kaptol, Zagreb, a district of Zagreb, Croatia* Kaptol , a settlement in Požega-Slavonia County, Croatia* Kaptol, Slovenia, a settlement in the Kostel municipality in Slovenia...

    .
  • Belgrade
    Belgrade
    Belgrade is the capital and largest city of Serbia. It is located at the confluence of the Sava and Danube rivers, where the Pannonian Plain meets the Balkans. According to official results of Census 2011, the city has a population of 1,639,121. It is one of the 15 largest cities in Europe...

     now includes the formerly separate city of Zemun
    Zemun
    Zemun is a historical town and one of the 17 municipalities which constitute the City of Belgrade, the capital of Serbia...

    .

North America

  • Richmond
    Richmond, Virginia
    Richmond is the capital of the Commonwealth of Virginia, in the United States. It is an independent city and not part of any county. Richmond is the center of the Richmond Metropolitan Statistical Area and the Greater Richmond area...

     (Richmond and Manchester
    Manchester, Virginia
    Manchester, Virginia is a former independent city in Virginia in the United States. Prior to receiving independent status, it served as the county seat of Chesterfield County, between 1870 and 1876...

    ) in central Virginia
  • Cleveland (Cleveland and Ohio City) in Ohio
    Ohio
    Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...

  • Minneapolis. St. Anthony (not to be confused with St. Anthony Village, a modern city which is a suburb
    Suburb
    The word suburb mostly refers to a residential area, either existing as part of a city or as a separate residential community within commuting distance of a city . Some suburbs have a degree of administrative autonomy, and most have lower population density than inner city neighborhoods...

     of Saint Paul) was a twin city to Minneapolis in the two cities' youth. Minneapolis annexed St. Anthony in the late 1800s.
  • New York City
    New York City
    New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...

     (five boroughs, historically especially between Manhattan and Brooklyn)
  • Fremont, California
    Fremont, California
    Fremont is a city in Alameda County, California. It was incorporated on January 23, 1956, from the merger of five smaller communities: Centerville, Niles, Irvington, Mission San Jose, and Warm Springs...

     was formed in 1956 by the combination of the five towns of Centerville, Irvington, Niles, Mission San Jose, and Warm Springs, California
    California
    California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

    . The town of Newark
    Newark, California
    Newark is a city in Alameda County, California, United States. It was incorporated as a city in September 1955. Newark is an enclave, completely surrounded by the city of Fremont. Its population was 42,573 at the 2010 census.-Geography:...

     has always refused to merge into Fremont, and Newark is completely surrounded by Fremont.
  • Birmingham, Alabama
    Birmingham, Alabama
    Birmingham is the largest city in Alabama. The city is the county seat of Jefferson County. According to the 2010 United States Census, Birmingham had a population of 212,237. The Birmingham-Hoover Metropolitan Area, in estimate by the U.S...

    , was formed in 1871 by the merger of three neighboring towns. Over its first century, Birmingham repeatedly absorbed neighboring towns and villages, including places like North Birmingham.
  • What is now the city of Winston-Salem, North Carolina
    Winston-Salem, North Carolina
    Winston-Salem is a city in the U.S. state of North Carolina, with a 2010 population of 229,617. Winston-Salem is the county seat and largest city of Forsyth County and the fourth-largest city in the state. Winston-Salem is the second largest municipality in the Piedmont Triad region and is home to...

     was once two separate towns called Winston and Salem that were combined into one.
  • Ottawa
    Ottawa
    Ottawa is the capital of Canada, the second largest city in the Province of Ontario, and the fourth largest city in the country. The city is located on the south bank of the Ottawa River in the eastern portion of Southern Ontario...

    , Ontario
    Ontario
    Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

    , was given its large area by the amalgamation in 2001 of the old City of Ottawa
    Ottawa
    Ottawa is the capital of Canada, the second largest city in the Province of Ontario, and the fourth largest city in the country. The city is located on the south bank of the Ottawa River in the eastern portion of Southern Ontario...

    , the suburb
    Suburb
    The word suburb mostly refers to a residential area, either existing as part of a city or as a separate residential community within commuting distance of a city . Some suburbs have a degree of administrative autonomy, and most have lower population density than inner city neighborhoods...

    s of Nepean
    Nepean, Ontario
    - Recent quantity of snow :- History :Nepean Township, originally known as Township D, was established in 1792 and originally included what is now the central area of Ottawa west of the Rideau River. Jehiel Collins, from Vermont, is believed to have been the first person to settle in Nepean...

    , Kanata
    Kanata, Ontario
    Situated in the Ottawa Valley, Kanata is located about west-southwest of Downtown Ottawa along Highway 417 at a latitude of 45°18' North and a longitude of 75°55' West, with an area of . Its northern end is just to the west of the Ottawa River....

    , Gloucester
    Gloucester, Ontario
    Gloucester is a suburb of and within the City of Ottawa. Gloucester Township was established in 1792 and originally included lands east of the Rideau River from the Ottawa River south to Manotick. It was incorporated as a township in 1850 and became a city in 1981...

    , Rockcliffe Park
    Rockcliffe Park, Ontario
    Rockcliffe Park is one of the wealthiest neighbourhoods in Ottawa, Ontario, and is one of the most prosperous enclaves in Canada. From 1926 until 2001 it was an independent village, but was amalgamated with the rest of the city January 1, 2001...

    , Vanier
    Vanier, Ontario
    -External links:**...

     and Cumberland, Orleans
    Orléans, Ontario
    Orleans , also written Orléans, is a suburban area within the city of Ottawa, Ontario, Canada. It is located in the eastern part of the city along the Ottawa River, about from downtown Ottawa. The Canada 2006 Census gave Orleans a population of 95,491. It became a ward of the City of Ottawa in 2001...

    , and the rural townships of West Carleton
    West Carleton Township, Ontario
    West Carleton is a historic township in Eastern Ontario, Canada. It is located in the rural parts of the new City of Ottawa, west of Kanata. Its northern boundary is the Ottawa River....

    , Osgoode
    Osgoode Township, Ontario
    Osgoode Township is a former township that is now a part of the city of Ottawa, Ontario, Canada. It encompassed the same area that is currently Osgoode Ward. The township along the Rideau River was established in 1798 and incorporated in 1850. It was an independent township in Carleton County until...

    , Rideau
    Rideau Township, Ontario
    Rideau is an historic township in eastern Ontario, Canada. It is located in the rural parts of the City of Ottawa, in the extreme south. Its eastern boundary is the Rideau River, its namesake....

    , and Goulbourn
    Goulbourn Township, Ontario
    Goulbourn Township, Ontario was formed in 1818, roughly 20 km southwest of downtown Ottawa, with the first major settlement occurring in Richmond. Other communities in the township include Stittsville, Munster, and Ashton. Stittsville is the largest community in the township, owing in part to its...

  • Gatineau
    Gatineau
    Gatineau is a city in western Quebec, Canada. It is the fourth largest city in the province. It is located on the northern banks of the Ottawa River, immediately across from Ottawa, Ontario, and together they form Canada's National Capital Region. Ottawa and Gatineau comprise a single Census...

    , Quebec
    Quebec
    Quebec or is a province in east-central Canada. It is the only Canadian province with a predominantly French-speaking population and the only one whose sole official language is French at the provincial level....

    , formed by the amalgamation of the old City of Gatineau
    Gatineau
    Gatineau is a city in western Quebec, Canada. It is the fourth largest city in the province. It is located on the northern banks of the Ottawa River, immediately across from Ottawa, Ontario, and together they form Canada's National Capital Region. Ottawa and Gatineau comprise a single Census...

    , City of Hull
    Hull, Quebec
    Hull is the central and oldest part of the city of Gatineau, Quebec, Canada. It is located on the west bank of the Gatineau River and the north shore of the Ottawa River, directly opposite Ottawa. As part of the Canadian National Capital Region, it contains offices for twenty thousand...

    , City of Aylmer
    Aylmer, Quebec
    Aylmer is a former city in Quebec, Canada. It became a sector of the City of Gatineau on January 1, 2002. Located on the Ottawa River and Route 148 it is a part of the National Capital Region. The population in 2006 was 41 882 — approx. 16% of Gatineau...

    , City of Buckingham
    Buckingham, Quebec
    Buckingham was a city located in the Outaouais region of the province of Quebec. Since January 1, 2002, it has been part of the amalgamated city of Gatineau which merged five former municipalities, including Masson-Angers, Buckingham, Hull, Aylmer and Gatineau, into a single entity...

     and the Municipality of Masson-Angers all facing the City of Ottawa
    Ottawa
    Ottawa is the capital of Canada, the second largest city in the Province of Ontario, and the fourth largest city in the country. The city is located on the south bank of the Ottawa River in the eastern portion of Southern Ontario...

    , Ontario
    Ontario
    Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

     from the north shore of the Ottawa River
    Ottawa River
    The Ottawa River is a river in the Canadian provinces of Ontario and Quebec. For most of its length, it now defines the border between these two provinces.-Geography:...

    .
  • Toronto
    Toronto
    Toronto is the provincial capital of Ontario and the largest city in Canada. It is located in Southern Ontario on the northwestern shore of Lake Ontario. A relatively modern city, Toronto's history dates back to the late-18th century, when its land was first purchased by the British monarchy from...

     formed by an amalgamation
    Amalgamation of Toronto
    The amalgamation of Toronto was the creation of the current political borders of Toronto, Ontario, Canada after amalgamating, annexing, and merging with surrounding municipalities since the 18th century...

     of the Old Toronto with East York
    East York
    East York can refer to:*East York, Pennsylvania, United States*East York, Ontario, Canada...

    , Etobicoke, North York, Scarborough
    Scarborough, Ontario
    Scarborough is a dissolved municipality within the city of Toronto, Ontario, Canada. Geographically, it comprises the eastern part of Toronto. It is bordered on the south by Lake Ontario, on the west by Victoria Park Avenue, on the north by Steeles Avenue East, and on the east by the Rouge River...

     and York
    York, Ontario
    York is a dissolved municipality in Toronto, Ontario, Canada. Geographically, it is located northwest of Old Toronto, southwest of North York and east of Etobicoke, where it is bounded by the Humber River. Formerly a separate city, it was one of six municipalities that amalgamated in 1998 to form...

    , which were themselves products of earlier amalgamations.
  • Thunder Bay
    Thunder Bay
    -In Canada:Thunder Bay is the name of three places in the province of Ontario, Canada along Lake Superior:*Thunder Bay District, Ontario, a district in Northwestern Ontario*Thunder Bay, a city in Thunder Bay District*Thunder Bay, Unorganized, Ontario...

    , Ontario
    Ontario
    Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

     (Fort William
    Fort William, Ontario
    Fort William was a city in Northern Ontario, located on the Kaministiquia River, at its entrance to Lake Superior. It amalgamated with Port Arthur and the townships of Neebing and McIntyre to form the city of Thunder Bay in January 1970. Ever since then it has been the largest city in Northwestern...

     and Port Arthur
    Port Arthur, Ontario
    Port Arthur was a city in Northern Ontario which amalgamated with Fort William and the townships of Neebing and McIntyre to form the city of Thunder Bay in January 1970. Port Arthur was the district seat of Thunder Bay District.- History :...

    ).
  • Lloydminster
    Lloydminster
    Lloydminster is a Canadian city which has the unusual geographic distinction of straddling the provincial border between Alberta and Saskatchewan...

    , Canada, on the Saskatchewan
    Saskatchewan
    Saskatchewan is a prairie province in Canada, which has an area of . Saskatchewan is bordered on the west by Alberta, on the north by the Northwest Territories, on the east by Manitoba, and on the south by the U.S. states of Montana and North Dakota....

    -Alberta
    Alberta
    Alberta is a province of Canada. It had an estimated population of 3.7 million in 2010 making it the most populous of Canada's three prairie provinces...

     border, was formed as a single entity in 1903, when both future provinces were part of the Northwest Territories
    Northwest Territories
    The Northwest Territories is a federal territory of Canada.Located in northern Canada, the territory borders Canada's two other territories, Yukon to the west and Nunavut to the east, and three provinces: British Columbia to the southwest, and Alberta and Saskatchewan to the south...

    , but was divided into two separate entities in 1905 because the border between the newly created provinces bisected the community. In 1930, the two towns were reunited as a single town under the shared jurisdiction of both provinces, and Lloydminster was reincorporated as a single city in 1958.
  • Halifax
    City of Halifax
    Halifax is a city in Canada, which was the capital of the province of Nova Scotia and shire town of Halifax County. It was the largest city in Atlantic Canada until it was amalgamated into Halifax Regional Municipality in 1996...

     and Dartmouth
    Dartmouth, Nova Scotia
    Dartmouth founded in 1750, is a community and planning area of the Halifax Regional Municipality, Nova Scotia. Located on the eastern shore of Halifax Harbour, Dartmouth has been nicknamed the City of Lakes after the large number of lakes located in the city.On April 1, 1996, the provincial...

     (Canada) were forcibly merged in 1996 along with Bedford
    Bedford, Nova Scotia
    Bedford is a community in the Halifax Regional Municipality, Nova Scotia, Canada. It was an independent town from 1980-1996. Bedford lies on the northwestern end of Bedford Basin, an extension of the Halifax Harbour...

     and Halifax County
    Halifax County, Nova Scotia
    Halifax County is a county in the Canadian province of Nova Scotia.The Municipality of the County of Halifax was the municipal government of Halifax County, apart from the separately incorporated towns and cities therein...

     to create the Halifax Regional Municipality.
  • Saguenay, Quebec
    Saguenay, Quebec
    Saguenay is a city in the Saguenay-Lac-Saint-Jean region of Quebec, Canada, on the Saguenay River, about north of Quebec City....

     (Chicoutimi, Jonquière, et al.)
  • Seattle annexed the neighboring towns of West Seattle
    West Seattle, Seattle, Washington
    West Seattle comprises two of Seattle, Washington's thirteen districts, Delridge and Southwest and encompasses all of Seattle west of the Duwamish River. It was incorporated as an independent town in 1902 and was annexed by Seattle in 1907. Among the area's attractions are its saltwater beach parks...

     and Ballard
    Ballard, Seattle, Washington
    Ballard is a neighborhood located in the northwestern part of Seattle, Washington. To the north it is bounded by Crown Hill, ; to the east by Greenwood, Phinney Ridge and Fremont ; to the south by the Lake Washington Ship Canal; and to the west by Puget Sound’s Shilshole Bay. The neighborhood’s...

    .
  • Lincoln City, Oregon
    Lincoln City, Oregon
    Lincoln City is a city in Lincoln County, Oregon, United States. It is named after the county. The population was 7,930 at the 2010 census.- History :...

     was formed in 1965 by merging the extant seaside towns of Oceanlake, Delake, and Taft, with the adjoining unincorporated areas of Nelscott and Cutler City.
  • Pittsburgh annexed Allegheny City
    Allegheny, Pennsylvania
    Allegheny City was a Pennsylvania municipality located on the north side of the junction of the Allegheny and Ohio rivers, across from downtown Pittsburgh. It was annexed by Pittsburgh in 1907...

    , which is now the quarter of the city that lies north of the Allegheny and Ohio rivers. Also annexed was Birmingham, now referred to as the "South Side".
  • Ciudad Guayana
    Ciudad Guayana
    Ciudad Guayana is a city in Bolívar State, Venezuela. It lies south of the Orinoco, where the river is joined by the Caroní River. The city, officially founded in 1961, is actually composed of the old town of San Félix at the east and the new town of Puerto Ordaz at the west, which lie either...

    , Venezuela, officially founded in 1961 is actually composed of the old town of San Félix at the east and the new modern planned town of Puerto Ordaz at the west of Caroní river in Bolívar state.
  • Bethlehem, Pennsylvania
    Bethlehem, Pennsylvania
    Bethlehem is a city in Lehigh and Northampton Counties in the Lehigh Valley region of eastern Pennsylvania, in the United States. As of the 2010 census, the city had a total population of 74,982, making it the seventh largest city in Pennsylvania, after Philadelphia, Pittsburgh, Allentown, Erie,...

    , which absorbed the cities of South Bethlehem, and West Bethlehem. The former Bethlehem and South Bethlehem are situated in Northampton County, Pennsylvania
    Northampton County, Pennsylvania
    As of the 2010 census, the county was 86.3% White, 5.0% Black or African American, 0.2% Native American or Alaskan Native, 2.4% Asian, 0.0% Native Hawaiian, 2.2% were two or more races, and 3.8% were some other race. 10.5% of the population were of Hispanic or Latino ancestry.As of the census of...

    , and West Bethlehem is in Lehigh County. As a result, present-day Bethlehem straddles the county line.
  • Montreal
    Montreal
    Montreal is a city in Canada. It is the largest city in the province of Quebec, the second-largest city in Canada and the seventh largest in North America...

    , Quebec, was merged with the other 27 communities on the Island of Montreal by an act in the Quebec Parliament in 2002. Several communities later voted via referendum to de-merge and there are now a total of 15, leaving Montreal merged with the other 12.
  • Kingston, Ontario
    Kingston, Ontario
    Kingston, Ontario is a Canadian city located in Eastern Ontario where the St. Lawrence River flows out of Lake Ontario. Originally a First Nations settlement called "Katarowki," , growing European exploration in the 17th Century made it an important trading post...

     was amalgamated in 1998 with the neighboring Kingston and Pittsburgh Townships.
  • Winnipeg
    Winnipeg
    Winnipeg is the capital and largest city of Manitoba, Canada, and is the primary municipality of the Winnipeg Capital Region, with more than half of Manitoba's population. It is located near the longitudinal centre of North America, at the confluence of the Red and Assiniboine Rivers .The name...

    , Manitoba
    Manitoba
    Manitoba is a Canadian prairie province with an area of . The province has over 110,000 lakes and has a largely continental climate because of its flat topography. Agriculture, mostly concentrated in the fertile southern and western parts of the province, is vital to the province's economy; other...

    , in 1971 was the first major North American city to be amalgamated in what was known as Unicity
    Unicity
    The term Unicity refers to reforms in the structure of the metropolitan government of Winnipeg in 1972. Unicity, an ambitious experiment in local government reform, established the City of Winnipeg as one unified city; until that point, the greater Winnipeg area had been composed of several...

    . The centralized city of Winnipeg was merged with all of its suburbs (12 other communities and municipalities), more than doubling its population. See also Subdivisions of Winnipeg#Unicity
  • Helena-West Helena, Arkansas
    Helena-West Helena, Arkansas
    Helena-West Helena is the county seat of and the largest city within Phillips County, Arkansas, United States. The current city represents a consolidation, effective on January 1, 2006, of the two Arkansas cities of Helena and West Helena. West Helena is located on the western side of Crowley's...

     was formed in 2006 by the merger of the previous cities of Helena
    Helena, Arkansas
    Helena is the eastern portion of Helena-West Helena, Arkansas, a city in Phillips County, Arkansas. As of the 2000 census, this portion of the city population was 6,323. Helena was the county seat of Phillips County until January 1, 2006, when it merged its government and city limits with...

     and West Helena
    West Helena, Arkansas
    West Helena is the western portion of Helena-West Helena, Arkansas, a city in Phillips County, Arkansas, United States. As of the 2000 census, this portion of the city population was 8,689....

    .

Asia & Australia

  • Wuhan
    Wuhan
    Wuhan is the capital of Hubei province, People's Republic of China, and is the most populous city in Central China. It lies at the east of the Jianghan Plain, and the intersection of the middle reaches of the Yangtze and Han rivers...

     in China consists of the towns of Wuchang, Hankou, and Hanyang in Hubei Province

See also

  • Divided cities
    Divided cities
    A divided city is one which, as a consequence of political changes or border shifts, presently constitutes two separate entities. Listed are the localities and the state they belonged to at the time of division...

  • United cities
    United cities
    A united city is one which, as a consequence of political changes or border shifts, once constituted two separate entities that were later merged...

  • Cross-border town naming
    Cross-border town naming
    Cross-border town naming occurs where towns or villages with the same or equivalent names are divided between two different countries. This does not necessarily imply that those towns or villages are located in geographic proximity, or that they are located near a current border...

  • Megacity
    Megacity
    A megacity is usually defined as a metropolitan area with a total population in excess of 10 million people. Some definitions also set a minimum level for population density . A megacity can be a single metropolitan area or two or more metropolitan areas that converge. The terms conurbation,...

  • Sister cities
  • List of metropolitan areas that overlap multiple countries
  • List of twin towns and sister cities
  • Global city
    Global city
    A global city is a city that is deemed to be an important node in the global economic system...

  • Ecumenopolis
    Ecumenopolis
    Ecumenopolis is a word invented in 1967 by the Greek city planner Constantinos Doxiadis to represent the idea that in the future urban areas and megalopolises would eventually fuse and there would be a single continuous worldwide city as a...

  • Metropolis
    Metropolis
    A metropolis is a very large city or urban area which is a significant economic, political and cultural center for a country or region, and an important hub for regional or international connections and communications...

  • Megalopolis
    Megalopolis (city type)
    A megalopolis is typically defined as a chain of roughly adjacent metropolitan areas. The term was used by Oswald Spengler in his 1918 book, The Decline of the West, and Lewis Mumford in his 1938 book, The Culture of Cities, which described it as the first stage in urban overdevelopment and...

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