The Federal Republic of Nigeria, commonly known as Nigeria, is a West African country located at the apex of the west coast of the Gulf of Guinea in Africa. The neighboring countries include the west Benin, Niger to the north, Chad to the northeast, and Cameroon to the east. Nigeria is the most populous country in Africa, and the seventh most populous country in the world. Among the countries dominated by blacks in the world The most populous country. It is listed as one of the next 11 countries and a member of the Commonwealth.