Africa’s surging megacity built between lagoon and sea
Lagos, southwestern Nigeria’s port metropolis, was estimated in November 2025 at roughly 17 to 21 million people—the country’s largest city, Africa’s most populous urban area, and among the world’s fastest-growing megacities. Barrier islands and sand spits shield a lagoon mouth, while Portuguese sailors left the “lakes” name beside Yoruba Èkó.
Fifteenth-century Awori Yoruba farmsteads around today’s Lagos Island, Eti-Osa, Amuwo-Odofin, and Apapa grew into Ereko—“farmstead”—hence Eko. Portuguese naming likely echoed Lagos in Portugal, then a launch pad for African coastal voyages. Barrier islands and sand spits such as Bar Beach can stretch about one hundred kilometres east and west of the lagoon mouth. The settlement later split conceptually into Island and Mainland as urbanisation raced west across the lagoon. It served as Nigeria’s capital until the federal seat moved to Abuja on 12 December 1991, a shift planned since a 1976 act, though courts and commerce stayed put on the coast.
No single municipality governs the whole; sixteen of Lagos State’s twenty local government areas form the metro under state oversight after the old Lagos City Council vanished in 1976. Oil-boom migration in the 1970s fused outlying towns such as Mushin, Ikeja, and Agege into one continuous metropolitan fabric. By 2006 the built-up zone spilled beyond state lines into what officials call Greater Metropolitan Lagos, adding roughly 1,535 square kilometres of continuous urban land. Federal 2006 census figures near nine million clashed with a state estimate near sixteen million; daily inflows of about three thousand people keep the totals contested. Three ports—Apapa, Tin Can Island, and Lekki—plus an international airport, expressways toward Badagry, Abeokuta, Ibadan, and Calabar, and standard-gauge rail toward Abeokuta and Ibadan help the city handle about 88 percent of Nigeria’s exports.
Finance brands the skyline: Access Bank, First Bank, Zenith, and the Nigerian Exchange Group headline a West and Central African money hub, joined by breweries, shipyards, airlines, and pharmaceutical plants. Four public universities—LASU, UNILAG, LASUSTECH, and LASUED—plus six private ones, oceanographic and medical institutes, the National Arts Theatre in Surulere, and Yoruba cultural centres feed a dense creative scene. The conurbation now sits inside the emerging Abidjan–Lagos Corridor spanning five West African states, while urban rail ranks among Africa’s most modern systems—infrastructure racing to match demographic heat on the barrier-island shore.
Source: Lagos
