Nigerian Metropolis is a term used to describe two major cities in Nigeria: Lagos and Ibadan. Lagos is the most populous city in Nigeria, with an estimated population of over 21 million people. It is located on the western coast of Nigeria and is the economic and financial hub of the country. Ibadan is the second largest city in Nigeria, with an estimated population of over 3 million people. It is located in the south-western part of the country and is known for its cultural heritage and educational institutions.