6) Niger (1,267,000 square kilometers)
This landlocked country is the largest nation in West Africa. More than 80 percent of its land area is covered by the Sahara Desert. The population of Niger is approximately 15.73 million.
5) Chad (1,284,000 square kilometers)
Central African landlocked nation Chad has a population of 10.33 million. Around 1.9 percent of Chad is water. Lake Chad is the largest wetland in Chad, and the second-largest in the African continent.