-------------is the longest river in West Africa

The longest river in West Africa is the river Niger. It is approximately 4,180 km (2,600 mi) long and runs through five West African countries: Guinea, Mali, Niger, Benin, and Nigeria. The river Niger is an important source of water, transportation, and irrigation for millions of people living in these countries. It also supports a diverse range of flora and fauna and is an important natural resource for the region. The river Benue is a major tributary of the river Niger and is the second-longest river in West Africa. The river Volta and Senegal are not as long as the river Niger and are located in different regions of West Africa.