West Africa West Africa West Africa is the westernmost region of Africa. West Africa has been defined as including 17 countries: Benin, Burkina Faso, the island nation of Cape Verde, Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Mali, Mauritania, Niger, Nigeria, the islands of Saint Helena, Ascension and Tristan da Cunha, Senegal, Sierra Leone and Togo. The population of West Africa is estimated at about /1e6 round 0 million people as of . Studies of human mitochondrial DNA suggest that all humans share common ancestors from Africa, originated in the southwestern regions near the coastal border of Namibia and Angola at the
British West Africa British West Africa British West Africa was the collective name for British colonies in West Africa during the colonial period, either in the general geographical sense or the formal colonial administrative entity. The United Kingdom held varying parts of these territories or the whole throughout the 19th century. From west to east, the colonies became the independent countries of The Gambia, Sierra Leone, Ghana and Nigeria. Until independence, Ghana was referred to as Gold Coast. British West Africa, or the British West African Settlements, constituted during two periods (17 October 1821, until its first dissolution on 13 January 1850, and