The Deschênes River is a tributary of the south shore of the Petit Saguenay River flowing into the unorganized territory of Sagard in the Charlevoix-Est Regional County Municipality, Quebec, Canada.

The surface of the Deschênes River is usually frozen from the beginning of December to the end of March, however, safe ice circulation is generally from mid-December to mid-March.

This appendix receives the waters of Lakes Clapin, Dédé and Gauthier.

This confluence is located at: The term "Deschênes" is a surname of French origin.

The toponym "Rivière Deschênes" was officialized on December 5, 1968, at the Bank of Place Names of the Commission de toponymie du Québec.