The Lachance river (in French: rivière Lachance) is a watercourse whose mouth flows into the Gosselin River, a tributary of the Nicolet River in the city of Victoriaville, in the Arthabaska Regional County Municipality (MRC), in the administrative region of Centre-du-Québec, in Quebec, in Canada.

The Lachance River sometimes flows in agricultural and urban areas.

The neighboring watersheds of the Lachance River are: The Lachance river has its source west of the Demers road, north of the hamlet of Saint-Norbert.

The Lachance River flows on the east bank of the Gosselin River, in an area northeast of the city of Victoriaville, in the small valley dominated by Mont Saint-Michel.

[1] The toponym Rivière Lachance was made official on August 7, 1978, at the Place Names Bank of the Commission de toponymie du Québec.