Lagos is a city in the Nigerian state of Lagos. The city, with its adjoining conurbation, is the largest in Nigeria, as well as on the African continent. It is one of the fastest growing cities in the world and also one of the most populous urban agglomerations in the world. Lagos is a major financial centre in Africa; the mega city has the highest GDP, and also houses one of the largest and busiest ports on the continent.

Lagos which was the capital of Nigeria since its amalgamation in 1914, went on to become the capital of Lagos State, after its creation. However, the state capital was later moved to Ikeja in 1976, while the federal capital also moved to Abuja in 1991. Even though Lagos is still widely referred to as a city, the present day Lagos, also known as "Metropolitan Lagos", and officially as "Lagos Metropolitan Area", is an urban agglomeration or conurbation, consisting of 16 LGAs, including Ikeja, the state capital of Lagos State.