- Niamey is the capital and largest city of Niger, a country located in West Africa. It is situated on the banks of the Niger River, and serves as the administrative, cultural, and economic center of the country. With a population of over 1 million people, Niamey is a vibrant and bustling city with a diverse range of ethnic groups and cultures. It is known for its colorful markets, lively music scene, and historical landmarks such as the Grand Mosque and the National Museum of Niger. The city also hosts various festivals and events throughout the year, including the Festival International de la Mode Africaine and the Festival of the Sahara.