Niger River Niger River The Niger River (; , ) is the principal river of West Africa, extending about . Its drainage basin is in area. Its source is in the Guinea Highlands in southeastern Guinea. It runs in a crescent through Mali, Niger, on the border with Benin and then through Nigeria, discharging through a massive delta, known as the Niger Delta or the Oil Rivers, into the Gulf of Guinea in the Atlantic Ocean. The Niger is the third-longest river in Africa, exceeded only by the Nile and the Congo River (also known as the Zaïre River). Its main tributary
Greater Upper Nile along with its fellow Southern Sudanese regions of Bahr el Ghazal and Equatoria. The three regions now constitute the Republic of South Sudan. Greater Upper Nile The Greater Upper Nile is a region of northeastern South Sudan. It is named for the White Nile, a tributary of the Nile River in North and East Africa. The region consisted of the erstwhile states of Jonglei, Unity, and Upper Nile. It borders Ethiopia to the east and the Republic of the Sudan to the north. The South Sudanese region of Bahr el Ghazal lies to the west and the region of Equatoria