The Sanaga River (formerly German: Zannaga) is the largest river in Cameroon located in East Region, Centre Region and Littoral Region. Its length is about 603 km (375 mi) from the confluence of Djérem and Lom River. The total length of Sanaga-Djérem River system is about 1,067.5 km (663.3 mi). Djerem is the longest source of Sanaga River with a total length of 464.5 km.

The Sanaga River has its source at the Adamawa Plateau. It is formed by the confluence of the Djérem and Lom Rivers in the north of the East Region. Djérem River has a total length of 464.5 km (288.6 mi) and Lom River a total length of 424.2 km (263.6 mi). Apart from these originating rivers, the largest tributary of Sanaga is Mbam River with a total length of 548 km (341 mi).

The Sanaga River forms a boundary between two tropical moist forest ecoregions. The Cross-Sanaga-Bioko coastal forests lie to the north between the Sanaga River and the Cross River of Nigeria, and the Atlantic Equatorial coastal forests extend south of the river through southwestern Cameroon and Equatorial Guinea, Gabon, the Republic of the Congo, Cabinda and the Democratic Republic of the Congo.

The flow of the river was measured at Edéa in m³/s

Graphs are unavailable due to technical issues. Updates on reimplementing the Graph extension, which will be known as the Chart extension, can be found on Phabricator and on MediaWiki.org.

Beginning at the headwaters, there are 2 dams on the Sanaga River:

Dam	Nameplate capacity (MW)	Reservoir	Surface area (km)	Total capacity (Mio. m³)
Song Loulou	384			10
Edea	264

• The Camrail railway bridges the Sanaga River at Edea.

3°33′33.62″N 9°39′07.83″E / 3.5593389°N 9.6521750°E / 3.5593389; 9.6521750