The meridian 102° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.
The 102nd meridian west forms a great circle with the 78th meridian east.
In Canada, part of the border between the Northwest Territories and Nunavut is defined by the meridian, and part of the border between Saskatchewan and Manitoba runs about 400m west of the meridian. At the 60th parallel north, these borders form a near-quadripoint known as Canada's Four Corners. 102°W is the Second Meridian of Canada's Dominion Land Survey.
In the United States, the meridian formed the eastern border of the historic and extralegal Territory of Jefferson. The eastern border of Colorado with Nebraska and Kansas lies on the 25th meridian west from Washington, which lies a couple of miles west of the 102nd meridian west.
Starting at the North Pole and heading south to the South Pole, the 102nd meridian west passes through:
| Co-ordinates | Country, territory or sea | Notes |
|---|---|---|
| Arctic Ocean | ||
| Peary Channel | ||
| Canada | Nunavut - Ellef Ringnes Island | |
| Danish Strait | ||
| Canada | Nunavut - King Christian Island | |
| Unnamed waterbody | Passing just west of Helena Island, Nunavut, Canada | |
| Canada | Nunavut - Bathurst Island | |
| Erskine Inlet | ||
| Canada | Nunavut - Alexander Island and Bathurst Island | |
| Parry Channel | Viscount Melville Sound | |
| Canada | Nunavut - Prince of Wales Island | |
| M'Clintock Channel | ||
| Canada | Nunavut - Victoria Island | |
| Albert Edward Bay | ||
| Canada | Nunavut - Victoria Island | |
| Queen Maud Gulf | ||
| Canada | Nunavut - Jenny Lind Island | |
| Queen Maud Gulf | ||
| Canada | Nunavut Northwest Territories / Nunavut border Manitoba - running about 400m east of, and parallel to, the border with Saskatchewan Saskatchewan |
|
| United States | North Dakota South Dakota Nebraska Kansas Oklahoma Texas |
|
| Mexico | Coahuila Zacatecas San Luis Potosí Zacatecas Aguascalientes Jalisco Guanajuato Jalisco Guanajuato Michoacán Guerrero |
|
| Pacific Ocean | ||
| Southern Ocean | ||
| Antarctica | Unclaimed territory |
|
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