The three biggest cities in Nigeria are Lagos, Abuja, and Kano. All three of these cities have a population of over 1 million people. Lagos is the most populous city in Nigeria with a population of over 21 million people. Abuja is the capital city of Nigeria and has a population of over 1.8 million people. Kano is the second largest city in Nigeria with a population of over 9 million people.
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