City (pop., 1999: urban agglomeration, 12,763,000) and chief port, Nigeria.
It is Nigeria's largest city, built on four main islands
Lagos, Iddo, Ikoyi, and Victoria
that are connected to each other and to the mainland by bridges. Its population is centered on Lagos Island, on the Bight of Benin. Part of the slave trade , Lagos came into increasingly greater contact with the British. It was ceded to Britain in 1861, became a crown colony, and was governed from Sierra Leone (1866–74) and as part of the Gold Coast colony (1874–86). Joined with the protectorate of Southern Nigeria in 1906, it was made the capital of the colony of Nigeria in 1914. It was the capital (1960–91) of independent Nigeria until Abuja became the new capital. It is a major trade and industrial centre.