From the beginning, Lagos has expanded on the mainland west of the lagoon and the conurbation, including Ikeja (which is the capital of Lagos State) and Agege, now reaches more than 40 kilometres (25 miles) north-west of Lagos Island. Some suburbs include Ikorodu, Epe and Badagry, and more local councils have recently been created, bringing the total number of local governments in Lagos to 57 (This includes Local Council Development Areas or LCDAs).

Most of the population lives on the mainland, and most industries are located there too. Lagos is known for its music and night life, which used to be located in areas around Yaba and Surulere. In recent years more night clubs have sprung up on the island, making the island, particularly Victoria Island, the main nightlife attraction. Lagos Mainland districts include Ebute-Meta, Surulere, Yaba (location of the University of Lagos) and Ikeja, site of Murtala Muhammed International Airport and capital of Lagos State.

Greater Lagos includes Mushin, Maryland, Somolu, Oshodi, Oworonsoki, Isolo, Ikotun, Agege, Iju Ishaga, Egbeda, Ketu, Bariga, Ipaja, Ajah and Ejigbo.