The Western Province is the most densely populated province of Sri Lanka

Sri Lanka

Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka is a country off the southern coast of the Indian subcontinent. Known until 1972 as Ceylon , Sri Lanka is an island surrounded by the Indian Ocean, the Gulf of Mannar and the Palk Strait, and lies in the vicinity of India and the...

. It is home to the legislative capital Sri Jayawardenapura as well to Colombo

Colombo

Colombo is the largest city of Sri Lanka. It is located on the west coast of the island and adjacent to Sri Jayawardenapura Kotte, the capital of Sri Lanka. Colombo is often referred to as the capital of the country, since Sri Jayawardenapura Kotte is a satellite city of Colombo...

, the nation's administrative and business center.
Basnahira is divided into 3 districts:

• Colombo District
  Colombo District
  Colombo District is the smallest district in Sri Lanka with an area of 642 km². It is located in the Western Province, on the western coast of the island. Sri Lanka’s commercial capital, Colombo and the political capital, Sri Jayewardenepura Kotte are located in this district...
  
   642 km² (247.9 sq mi)
• Gampaha District
  Gampaha District
  - Local Authorities in Gampaha district:Gampaha is the District Capital of Gampaha District and is a principal town around Colombo. It is about 4 km from Miriswatte on the Colombo - Kandy Road.- Urban Councils :* Katunayake-Seeduwa * Ja-ela* Wattala...
  
   1386.6 km² (535.4 sq mi)
• Kalutara District 1606 km² (620.1 sq mi)

• Colombo
  Colombo
  Colombo is the largest city of Sri Lanka. It is located on the west coast of the island and adjacent to Sri Jayawardenapura Kotte, the capital of Sri Lanka. Colombo is often referred to as the capital of the country, since Sri Jayawardenapura Kotte is a satellite city of Colombo...
  
  
• Kalutara
  Kalutara
  Kalutara is a resort town located approximately 40 km south of Colombo in Sri Lanka.- Overview :Once an important spice-trading center, the city's name is derived from the Kalu Ganga River . In the 11th Century, the town was temporarily made a capital on the orders of a South Indian Prince...
  
  
• Gampaha
  Gampaha
  Gampaha is an urban city in Sri Lanka and is the capital of the Gampaha District in Western Province, north of Colombo. Gampaha District is separated from Colombo mainly by the Kelani River.-Namesake:...
  
  
• Dehiwala-Mount Lavinia
  Dehiwala-Mount Lavinia
  Dehiwala-Mount Lavinia Is a newly created city lying immediately south of Colombo, one of the largest cities in Sri Lanka. It is the result of certain key urban suburbs and communities combined for administrative purposes. The centres include Dehiwala and the beach resort of Mount Lavinia....
  
  
• Homagama
  Homagama
  Homagama is a town situated 24km from the city of Colombo in the Western Province of Sri Lanka. The Homagama pradeshiya sabha consists of the Homagama divisional secretariat division and 10 GN division of Padukka DS division. The total Land area is about is 137 km² of 90 GN division. The...
  
  
• Maharagama
  Maharagama
  Maharagama is a Town, Municipal Area in the Colombo District and a suburb of Colombo Sri Lanka. Situated on the High-Level Road about 15 km away from the centre of the commercial capital Colombo, Maharagama is the city with the third largest population , in Sri Lanka. It developed rapidly in...
  
  
• Moratuwa
  Moratuwa
  Moratuwa is a city on the southwestern coast of Sri Lanka, near Dehiwela-Mount Lavinia. It is situated on the Galle–Colombo main highway, 18 km south of the capital, Colombo. Moratuwa is surrounded on three sides by water, except in the north of the city, by the Indian Ocean on the west...
  
  
• Nittambuwa
  Nittambuwa
  Nittambuwa is a town situated in Gampaha District, Sri Lanka....
  
  
• Wattala
  Wattala
  Wattala is a town and Urban Council in Gampaha District in Western Sri Lanka with a distance of 8 miles to Colombo. Wattala is one of the towns situated near the road between Colombo and the airport which is situated at Katunayake. It is in the Gampaha province. Around the main town there are many...
  
  
• Negombo
  Negombo
  Negombo is a town of about 121,933, approximately 37 km north of Colombo, in Sri Lanka. It is located at the mouth of the Negombo Lagoon, about 7 km from the Bandaranaike International Airport...
  
  
• Panadura
  Panadura
  - History :The historic debate 'Panadura Vadaya' was held in this place which is a milestone of the history of Buddhism in Sri Lanka with the initiative of the ven. Migettuwaththe Gunananda Thera.- People and Culture :Panadura is home to about 100,000 citizens...
  
  
• Ja-Ela
  Ja-Ela
  Ja-Ela is a major suburb approximately 20 km north of Colombo city center Fort, Sri Lanka.-Etymology:The Term Ja-Ela means Javanese Canal and denotes historical the presence of Sri Lankan Malays in the area...
  
  
• Avissawella
  Avissawella
  Avissawella, also known as Seethawakapura or Seethawaka, is a town along the A4 route from Colombo on the Western Coast to Kalmunai in the Eastern Coast of Sri Lanka via Ratnapura, Pelmadulla, Balangoda and Wellawaya.- Overview :...
  
  

Almost all the premier educational institutions in the island are located in Basnahira.