It flows in the municipalities of Laurierville, Plessisville and Notre-Dame-de-Lourdes, in the L'Érable Regional County Municipality (MRC), in the administrative region of Centre-du-Québec, in Quebec, in Canada.

The main neighboring hydrographic slopes of the Perdrix river are: The Perdrix river has its source at the limit in the municipality of Laurierville.

This zone is located 3.2 kilometres (2.0 mi) south of the Bécancour River, 3.6 kilometres (2.2 mi) west of the center of the village of Laurierville.

The partridge (in French: Perdrix) is a very common wild bird species in Canada.

The toponym "rivière Perdrix" was made official on December 5, 1968, at the Commission de toponymie du Québec.