The Mama (Russian: Мама) is a river in Irkutsk Oblast and Buryatia, Russia.

[1] The Mamsko-Chuysky District of Irkutsk Oblast is named after rivers Mama and Chuya.

After the confluence the Mama flows roughly northeastwards across a fragmented floodplain slightly meandering among rocky banks.

Finally the Mama meets the lower course of the Vitim 171 km (106 mi) from its mouth in the Lena.

Most of the territory adjacent to the river is covered by larch taiga and Siberian pine in the upper reaches, crowned by golets bare summits.