12th meridian west

The meridian 12° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Greenland, the Atlantic Ocean, Africa, the Southern Ocean, and Antarctica to the South Pole.

12th meridian west

The 12th meridian west forms a great circle with the 168th meridian east.

Part of the border between Western Sahara and Mauritania is defined by the meridian.[1]

From Pole to Pole

Starting at the North Pole and heading south to the South Pole, the 12th meridian west passes through:

Co-ordinates Country, territory or sea Notes
90°0′N 12°0′W Arctic Ocean
81°37′N 12°0′W  Greenland
81°18′N 12°0′W Atlantic Ocean
28°7′N 12°0′W  Morocco
27°40′N 12°0′W Western Sahara Claimed by  Morocco and the Sahrawi Arab Democratic Republic
26°0′N 12°0′W Western Sahara /  Mauritania border
23°27′N 12°0′W  Mauritania
14°46′N 12°0′W  Mali
14°12′N 12°0′W  Senegal For about 13 km
14°4′N 12°0′W  Mali For about 11 km
13°58′N 12°0′W  Senegal
13°46′N 12°0′W  Mali
13°34′N 12°0′W  Senegal
12°24′N 12°0′W  Guinea
9°54′N 12°0′W  Sierra Leone
7°12′N 12°0′W Atlantic Ocean Passing just east of the island of Tristan da Cunha,  Saint Helena, Ascension and Tristan da Cunha (at 37°7′S 12°13′W)
60°0′S 12°0′W Southern Ocean
71°18′S 12°0′W Antarctica Queen Maud Land, claimed by  Norway


  1. Brownlie, Ian (1979). African Boundaries: A Legal and Diplomatic Encyclopedia. Institute for International Affairs, Hurst and Co. pp. 437–44.

See also

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