Lagos, or Lagos City, is a large metropolitan city in southwestern Nigeria. With an upper population estimated above 21 million dwellers, it is the largest city in Nigeria, the most populous urban area on the African continent, and one of the fastest-growing megacities in the world. Lagos was the national capital of Nigeria until the government's December 1991 decision to move their capital to Abuja, in the centre of the country. Lagos is a major African financial centre and is the economic hub of Lagos State and Nigeria at large. The city has a significant influence on commerce, entertainment, technology, education, politics, tourism, art, and fashion in Africa. Lagos is also among the top ten of the world's fastest-growing cities and urban areas. In 2024, Time Out magazine ranked Lagos as the 19th best city to visit in the world. A megacity, it has the second-highest GDP in Africa, and houses one of the largest and busiest seaports on the continent. Due to the large urban population and port traffic volumes, Lagos is classified as a Medium-Port Megacity.