Lagdo Reservoir is a reservoir located in the Northern Province of Cameroon, on the Benue River, in the Niger basin. The lake covers an area of 586 km2.

The North Region makes up 66,090 km2 of the northern half of The Republic of Cameroon. Neighbouring territories include the Far North Region to the north, the Adamawa Region to the south, Nigeria to the west, Chad to the east, and Central African Republic to the southeast. The city of Garoua is both the political and industrial capital. Garoua is Cameroon's third largest port, despite the fact that the Bénoué River upon which it relies is only navigable for short periods of the year.