Sierra Leone, formally the Republic of Sierra Leone, is a country in West Africa. It is bounded by Guinea on the northerly & Liberia on the southland, with the Atlantic Ocean on the west.

The name Sierra Leone was accommodated from the Portuguese name for the nation: Serra Leoa.

Very much of Sierra Leone's coast lies in of mangrove swamps, with the exception of the peninsula on which the capital town Freetown is placed. The rest of Sierra Leone is mostly plateau (about 300 m or 1,000 ft above sea level) covered up by forests, with mountains in the north-eastern of the nation (highest point Loma Mansa, 1,948 m; 6,391 ft). The clime is tropic with a rainy season from May to Dec.

Big towns are the capital Freetown, Koidu (Sefadu), Bo, Kenema and Makeni.