Sierra Leone is located on the west coast of Africa, north of the equator. With a land area of 71,740 square kilometers (27,699 square miles). Sierra Leone is bordered by Guinea to the north and northeast, Liberia to the south and southeast, and the Atlantic Ocean to the west.

There are a wide variety of ecological and agricultural zones to which people have adapted. Starting in the west, Sierra Leone has some 400 kilometres (250 miles) of coastline, giving it both bountiful marine resources and attractive tourist potential. This is followed by low-lying mangrove swamps, rain-forested plains and farmland, and finally a mountainous plateau in the east, where Mount Bintumani rises to 1,948 meters (6,390 ft). The climate is tropical, with two seasons determining the agricultural cycle: the rainy season from May to November, followed by the dry season from December to May, which includes harmattan, when cool, dry winds blow in off the Sahara Desert. The national capital Freetown sits on a coastal peninsula, situated next to the Sierra Leone Harbor, the world's third largest natural harbour. This prime location historically made Sierra Leone the centre of trade and colonial administration in the region.