The most populous country in Africa is Nigeria. With an estimated population exceeding 200 million people, Nigeria stands out as not only the most populous in Africa but also one of the most diverse countries globally, with over 250 ethnic groups and more than 500 languages spoken. Major ethnic groups include the Hausa, Igbo, and Yoruba. Nigeria's population growth has significant implications for its economy, culture, and politics. The country is rich in natural resources, notably oil, and plays a crucial role in regional dynamics and global markets.