The Carmel River (in French: rivière Carmel) is a tributary on the northeast shore of the Nicolet Southwest River.

It crosses the municipalities of Sainte-Perpétue, Sainte-Monique and La Visitation-de-Yamaska, in the Nicolet-Yamaska Regional County Municipality (MRC), in the administrative region of Centre-du-Québec, in Quebec, in Canada.

The main neighboring hydrographic slopes of the Carmel River are: The Carmel River has its source in an agricultural zone to the northeast and to the east of the village of Sainte-Perpétue, on the northeast side of rang Saint-Charles road.

This river flows east in an agricultural zone, crossing the chemin du rang Saint-Joseph (route 259) in Sainte-Perpétue.

The toponym "Rivière Carmel" was made official on August 8, 1977, at the Commission de toponymie du Québec.