The meridian 90° west of Greenwich

Prime Meridian

The Prime Meridian is the meridian at which the longitude is defined to be 0°.The Prime Meridian and its opposite the 180th meridian , which the International Date Line generally follows, form a great circle that divides the Earth into the Eastern and Western Hemispheres.An international...

is a line of longitude

Longitude

Longitude is a geographic coordinate that specifies the east-west position of a point on the Earth's surface. It is an angular measurement, usually expressed in degrees, minutes and seconds, and denoted by the Greek letter lambda ....

 that extends from the North Pole

North Pole

The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is, subject to the caveats explained below, defined as the point in the northern hemisphere where the Earth's axis of rotation meets its surface...

 across the Arctic Ocean

Arctic Ocean

The Arctic Ocean, located in the Northern Hemisphere and mostly in the Arctic north polar region, is the smallest and shallowest of the world's five major oceanic divisions...

, North America

North America

North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

, the Gulf of Mexico

Gulf of Mexico

The Gulf of Mexico is a partially landlocked ocean basin largely surrounded by the North American continent and the island of Cuba. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. In...

, Central America

Central America

Central America is the central geographic region of the Americas. It is the southernmost, isthmian portion of the North American continent, which connects with South America on the southeast. When considered part of the unified continental model, it is considered a subcontinent...

, the Pacific Ocean

Pacific Ocean

The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

, the Southern Ocean

Southern Ocean

The Southern Ocean comprises the southernmost waters of the World Ocean, generally taken to be south of 60°S latitude and encircling Antarctica. It is usually regarded as the fourth-largest of the five principal oceanic divisions...

, and Antarctica to the South Pole

South Pole

The South Pole, also known as the Geographic South Pole or Terrestrial South Pole, is one of the two points where the Earth's axis of rotation intersects its surface. It is the southernmost point on the surface of the Earth and lies on the opposite side of the Earth from the North Pole...

.

In Antarctica, the meridian defines the western limit of Chile

Chile

Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...

's territorial claim. The land further west is not claimed by any nation.

The 90th meridian west forms a great circle

Great circle

A great circle, also known as a Riemannian circle, of a sphere is the intersection of the sphere and a plane which passes through the center point of the sphere, as opposed to a general circle of a sphere where the plane is not required to pass through the center...

 with the 90th meridian east

90th meridian east

The meridian 90° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole.The Ninety East Ridge is named after the meridian....

.

Starting at the North Pole

North Pole

The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is, subject to the caveats explained below, defined as the point in the northern hemisphere where the Earth's axis of rotation meets its surface...

 and heading south to the South Pole

South Pole

The South Pole, also known as the Geographic South Pole or Terrestrial South Pole, is one of the two points where the Earth's axis of rotation intersects its surface. It is the southernmost point on the surface of the Earth and lies on the opposite side of the Earth from the North Pole...

, the 90th meridian west passes through:

Co-ordinates	Country, territory or sea	Notes
90°0′N 90°0′W	Arctic Ocean Arctic Ocean The Arctic Ocean, located in the Northern Hemisphere and mostly in the Arctic north polar region, is the smallest and shallowest of the world's five major oceanic divisions...
81°54′N 90°0′W		Nunavut Nunavut Nunavut is the largest and newest federal territory of Canada; it was separated officially from the Northwest Territories on April 1, 1999, via the Nunavut Act and the Nunavut Land Claims Agreement Act, though the actual boundaries had been established in 1993...  - Ellesmere Island Ellesmere Island Ellesmere Island is part of the Qikiqtaaluk Region of the Canadian territory of Nunavut. Lying within the Canadian Arctic Archipelago, it is considered part of the Queen Elizabeth Islands, with Cape Columbia being the most northerly point of land in Canada...
81°1′N 90°0′W	Nansen Sound Nansen Sound Nansen Sound is an uninhabited strait in Qikiqtaaluk, Nunavut, Canada. It lies between western Grant Land on Ellesmere Island and Axel Heiberg Island. To the east it enters Greely Fiord.-References:...
80°31′N 90°0′W		Nunavut Nunavut Nunavut is the largest and newest federal territory of Canada; it was separated officially from the Northwest Territories on April 1, 1999, via the Nunavut Act and the Nunavut Land Claims Agreement Act, though the actual boundaries had been established in 1993...  - Axel Heiberg Island Axel Heiberg Island Axel Heiberg Island is an island in the Qikiqtaaluk Region, Nunavut, Canada. Located in the Arctic Ocean, it is the 31st largest island in the world and Canada's seventh largest island. According to Statistics Canada, it has an area of ....
78°17′N 90°0′W	Norwegian Bay Norwegian Bay Norwegian Bay is an Arctic ocean waterway in Qikiqtaaluk Region. Nunavut, Canada. Amund Ringnes Island is to the northwest , and Axel Heiberg Island to the north , Ellesmere Island is to the east, and Devon Island is to the south...
77°22′N 90°0′W		Nunavut Nunavut Nunavut is the largest and newest federal territory of Canada; it was separated officially from the Northwest Territories on April 1, 1999, via the Nunavut Act and the Nunavut Land Claims Agreement Act, though the actual boundaries had been established in 1993...  - Graham Island
77°13′N 90°0′W	Norwegian Bay Norwegian Bay Norwegian Bay is an Arctic ocean waterway in Qikiqtaaluk Region. Nunavut, Canada. Amund Ringnes Island is to the northwest , and Axel Heiberg Island to the north , Ellesmere Island is to the east, and Devon Island is to the south...
76°50′N 90°0′W		Nunavut Nunavut Nunavut is the largest and newest federal territory of Canada; it was separated officially from the Northwest Territories on April 1, 1999, via the Nunavut Act and the Nunavut Land Claims Agreement Act, though the actual boundaries had been established in 1993...  - North Kent Island North Kent Island North Kent Island is one of the uninhabited Canadian arctic islands in the Qikiqtaaluk Region of Nunavut, Canada. It is located in the Cardigan Strait between Devon Island's Colin Archer Peninsula and Ellesmere Island's Simmons Peninsula.-Geography:...  and Devon Island Devon Island Devon Island , claimed to be the largest uninhabited island on Earth, is located in Baffin Bay, Qikiqtaaluk Region, Nunavut, Canada. It is one of the larger members of the Canadian Arctic Archipelago, the second-largest of the Queen Elizabeth Islands, Canada's sixth largest island, and the 27th...
74°34′N 90°0′W	Barrow Strait Barrow Strait Barrow Strait is a shipping waterway in Northern Canada's territory of Nunavut. Forming part of the Parry Channel, the strait separates several large islands including Cornwallis Island and Devon Island to the north, from Prince of Wales Island, Somerset Island, and Prince Leopold Island to the...
74°4′N 90°0′W		Nunavut Nunavut Nunavut is the largest and newest federal territory of Canada; it was separated officially from the Northwest Territories on April 1, 1999, via the Nunavut Act and the Nunavut Land Claims Agreement Act, though the actual boundaries had been established in 1993...  - Prince Leopold Island
73°59′N 90°0′W	Prince Regent Inlet Prince Regent Inlet Prince Regent Inlet is a body of water between Somerset Island and the Brodeur Peninsula in Nunavut, Canada. To the south, the inlet leads to the Gulf of Boothia; to the north, it leads to Lancaster Sound. The Arctic inlet's northern portion is approximately wide; the southern portion is...
72°4′N 90°0′W		Nunavut Nunavut Nunavut is the largest and newest federal territory of Canada; it was separated officially from the Northwest Territories on April 1, 1999, via the Nunavut Act and the Nunavut Land Claims Agreement Act, though the actual boundaries had been established in 1993...  - Baffin Island Baffin Island Baffin Island in the Canadian territory of Nunavut is the largest island in the Canadian Arctic Archipelago, the largest island in Canada and the fifth largest island in the world. Its area is and its population is about 11,000...
71°31′N 90°0′W	Gulf of Boothia Gulf of Boothia The Gulf of Boothia is a body of water in Nunavut, Canada, the western side being within Kitikmeot Region while the eastern side is in Qikiqtaaluk Region. It is situated between Baffin Island and the Boothia Peninsula...
69°7′N 90°0′W		Nunavut Nunavut Nunavut is the largest and newest federal territory of Canada; it was separated officially from the Northwest Territories on April 1, 1999, via the Nunavut Act and the Nunavut Land Claims Agreement Act, though the actual boundaries had been established in 1993...  - Several islands including Helen Island Helen Island Helen Island is an uninhabited island in Nunavut, Canada. It is located in the Kitikmeot Region's side of the Gulf of Boothia. It is situated west of the mainland's Simpson Peninsula, between Pelly Bay and Login Bay.... , and the mainland
63°46′N 90°0′W	Hudson Bay Hudson Bay Hudson Bay , sometimes called Hudson's Bay, is a large body of saltwater in northeastern Canada. It drains a very large area, about , that includes parts of Ontario, Quebec, Saskatchewan, Alberta, most of Manitoba, southeastern Nunavut, as well as parts of North Dakota, South Dakota, Minnesota,...
57°1′N 90°0′W		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... > 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....
48°3′N 90°0′W		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...
47°49′N 90°0′W	Lake Superior Lake Superior Lake Superior is the largest of the five traditionally-demarcated Great Lakes of North America. It is bounded to the north by the Canadian province of Ontario and the U.S. state of Minnesota, and to the south by the U.S. states of Wisconsin and Michigan. It is the largest freshwater lake in the...
46°41′N 90°0′W		Michigan Michigan Michigan is a U.S. state located in the Great Lakes Region of the United States of America. The name Michigan is the French form of the Ojibwa word mishigamaa, meaning "large water" or "large lake".... > Wisconsin Wisconsin Wisconsin is a U.S. state located in the north-central United States and is part of the Midwest. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michigan to the northeast, and Lake Superior to the north. Wisconsin's capital is... > 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,... > Missouri Missouri Missouri is a US state located in the Midwestern United States, bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska. With a 2010 population of 5,988,927, Missouri is the 18th most populous state in the nation and the fifth most populous in the Midwest. It... > Arkansas Arkansas Arkansas is a state located in the southern region of the United States. Its name is an Algonquian name of the Quapaw Indians. Arkansas shares borders with six states , and its eastern border is largely defined by the Mississippi River... > 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...  - Passing through Memphis Memphis, Tennessee Memphis is a city in the southwestern corner of the U.S. state of Tennessee, and the county seat of Shelby County. The city is located on the 4th Chickasaw Bluff, south of the confluence of the Wolf and Mississippi rivers.... > Mississippi Mississippi Mississippi is a U.S. state located in the Southern United States. Jackson is the state capital and largest city. The name of the state derives from the Mississippi River, which flows along its western boundary, whose name comes from the Ojibwe word misi-ziibi... > Louisiana Louisiana Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...  - Passing through New Orleans
29°13′N 90°0′W	Gulf of Mexico Gulf of Mexico The Gulf of Mexico is a partially landlocked ocean basin largely surrounded by the North American continent and the island of Cuba. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. In...
21°10′N 90°0′W		Yucatán Yucatán Yucatán officially Estado Libre y Soberano de Yucatán is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 106 municipalities and its capital city is Mérida.... > Campeche Campeche Campeche is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. Located in Southeast Mexico, it is bordered by the states of Yucatán to the north east, Quintana Roo to the east, and Tabasco to the south west...
17°49′N 90°0′W
13°57′N 90°0′W
13°41′N 90°0′W	Pacific Ocean Pacific Ocean The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...	Passing just west of Genovesa Island Genovesa Island Genovesa Island is a shield volcano in the Galápagos Islands in the eastern Pacific Ocean. The island occupies about , and its maximum elevation is . The horse-shoe shaped island has a volcanic caldera whose wall has collapsed, forming the Great Darwin Bay, surrounded by cliffs...  and just east of Santa Fe Island Santa Fe Island Santa Fe Island , also called Barrington Island after admiral Samuel Barrington, is a small island of 24 km² which lies in the centre of the Galapagos archipelago, to the south east of Santa Cruz Island. Geologically it is one of the oldest, since volcanic rocks of about 4 million years old... , Galápagos Galápagos Islands The Galápagos Islands are an archipelago of volcanic islands distributed around the equator in the Pacific Ocean, west of continental Ecuador, of which they are a part.The Galápagos Islands and its surrounding waters form an Ecuadorian province, a national park, and a... ,
60°0′S 90°0′W	Southern Ocean Southern Ocean The Southern Ocean comprises the southernmost waters of the World Ocean, generally taken to be south of 60°S latitude and encircling Antarctica. It is usually regarded as the fourth-largest of the five principal oceanic divisions...
72°28′S 90°0′W	Antarctica	Border between unclaimed territory (to the west) and Antártica Chilena Province Antártica Chilena Province Antártica Chilena Province is the southernmost and one of four provinces in Chile's southernmost region, Magallanes and Antártica Chilena Region . The capital is Puerto Williams...  (to the east), claimed by

See also

• 89th meridian west
  89th meridian west
  The Meridian 89° West of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Gulf of Mexico, Central America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole....
  
  
• 91st meridian west
  91st meridian west
  The meridian 91° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Gulf of Mexico, Central America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole....
  
  
• 45X90 points
  45X90 points
  The 45X90 points are the four points on earth which are halfway between the geographical poles, the equator, the Prime Meridian, and the 180th meridian. They are some of the earth's significant coordinate intersections....