The Blanche river (French: rivière Blanche, pronounced [ʁivjɛʁ blɑ̃ʃ], lit.

'White River') is a tributary of the Felton River which flows into the Baie Sauvage to the south of Grand lac Saint François which constitutes the head lake of the Saint-François River.

The course of the "Blanche River" crosses the territories of the municipalities of Milan, Nantes, Stornoway and Saint-Romain, in the Le Granit Regional County Municipality (MRC), in the administrative region of Estrie, on the Rive-South of the St. Lawrence River, in the province of Quebec, Canada.

The main hydrographic slopes close to the "Blanche river" are: The Blanche River originates north of the village of Milan, on the north side of route 214.

The toponym "rivière Blanche" was officially registered on December 18, 1979, at the Commission de toponymie du Québec.