Situated in West Africa, Mauritania has an area of 1,030,700 sq km (397,955 sq mi). Mauritania extends 1,515 km (941 mi) NE – SW and 1,314 km (816 mi) SE – NW . Comparatively, the area occupied by Mauritania is slightly larger than three times the size of the state of New Mexico. It is bordered on the NE by Algeria, on the E and S by Mali, on the SW by Senegal, on the W by the Atlantic Ocean, and on the NW and N by the Western Sahara, with a total estimated boundary length of 5,828 km (3,621 mi), of which 754 km (469 mi) is coastline.
Mauritania's capital city, Nouakchott, is located on the Atlantic Coast.