The Kadéï River is a tributary of the Sangha River that flows through Cameroon and the Central African Republic. Its total drainage basin is 24,000 km. The river rises from the eastern Adamawa Plateau, southeast of Garoua-Boulaï (5°53′50″N 14°33′30″E / 5.89722°N 14.55833°E / 5.89722; 14.55833 (Kadéï River headwaters)) in Cameroon's East Province. The Kadéï is swelled by two tributaries, the Doumé at Mindourou (4°7′45″N 14°34′22″E / 4.12917°N 14.57278°E / 4.12917; 14.57278 (Doumé River mouth)) and the Boumbé (4°6′45″N 15°7′10″E / 4.11250°N 15.11944°E / 4.11250; 15.11944 (Boumbé River mouth)), before flowing east into the Central African Republic. At Nola (3°31′10″N 16°2′35″E / 3.51944°N 16.04306°E / 3.51944; 16.04306 (Kadéï River mouth)), the Kadéï meets the Mambéré and becomes the Sangha. The Kadéï is part of the Congo River basin.

• Communes of Cameroon

• Gwanfogbe, Mathew, Ambrose Meligui, Jean Moukam, and Jeanette Nguoghia (1983). Geography of Cameroon. Hong Kong: Macmillan Education Ltd.
• Neba, Aaron (1999). Modern Geography of the Republic of Cameroon, 3rd ed. Bamenda: Neba Publishers.