The Blanche river (in French: rivière Blanche) is a tributary of the Nicolet River which flows on the south shore of the St. Lawrence river.

The Blanche river flows entirely in the municipality of Chesterville, in the Arthabaska Regional County Municipality (MRC), in the Centre-du-Québec region, in the province of Quebec, in Canada.

The neighboring hydrographic slopes of the Blanche River are: The "Blanche River" has its source in the mountainous area at 5.2 kilometres (3.2 mi) northeast of the village of Chesterville in the municipality of Chesterville and at 1.3 kilometres (0.81 mi) to the southwest of the limit of the Municipality of Sainte-Hélène-de-Chester.

It flows over 10.5 kilometres (6.5 mi) according to the following segmentsː The Blanche river flows on the east bank of the Nicolet River in the hamlet "Domaine-de-la-Halte", at 4.0 kilometres (2.5 mi) (in direct line) to the south-east of center of the village of Chesterville, at 1.9 kilometres (1.2 mi) downstream of the municipal limit of Saint-Rémi-de-Tingwick and at 4.8 kilometres (3.0 mi) at north-west of the village of Ham-Nord.

The toponym "rivière Blanche" was made official on September 5, 1985, at the Commission de toponymie du Québec.