The Chensagi River is a tributary of Maicasagi Lake, in Regional County Municipality (RCM) of Eeyou Istchee James Bay (municipality), in the administrative region from Nord-du-Québec, in the Canadian province of Quebec, in Canada.

The surface of the river is usually frozen from early November to mid-May, however, safe ice circulation is generally from mid-November to mid-April.

The mouth of this head lake is located at: North of the mouth of the Matagami Lake; From its source, the "Chensagi River" flows on 99.1 kilometres (61.6 mi) according to the following segments: Upper course of Chensagi river (segment of 30.7 kilometres (19.1 mi)).

The latter flows southwesterly through the Max Passage into Goéland Lake which is crossed to the northwest by the Waswanipi River.

The mouth of the Chensagi River is located at: The toponym "Chensagi River" was formalized on December 5, 1968, at the Commission de toponymie du Québec, i.e. at the creation of this commission[3] Download coordinates as: