The Vallée River (in French: rivière Vallée) is a tributary of the west bank of the Chaudière River which flows northward to empty onto the south bank of the St. Lawrence River. It flows in the municipalities of Saint-Elzéar and Siante-Marie-de-Beauce, in the La Nouvelle-Beauce Regional County Municipality, in the administrative region of Chaudière-Appalaches, in Quebec, in Canada.

The main neighboring watersheds of the Vallée river are:

• north side: rivière des Îles Brûlées, Chaudière River;
• east side: Chaudière River, Saint-Elzéar stream;
• south side: Aulnaies stream, Savoie River;
• west side: Beaurivage River.

The Vallée river has its source in a mountainous area, in the municipality of Saint-Elzéar. This head area is located 2.5 kilometres (1.6 mi) west of the center of the village of Saint-Elzéar, at 6.0 kilometres (3.7 mi) west of Chaudière River and 8.0 kilometres (5.0 mi) northeast of Mont-Sainte-Marguerite.

From its source, the Vallée River flows over 9.8 kilometres (6.1 mi) in agricultural and forest areas, divided into the following segments:

• 1.5 kilometres (0.93 mi) north, in Saint-Elzéar, to a country road;
• 3.8 kilometres (2.4 mi) north, up to the route du rang du Bas Saint-Jacques;
• 2.1 kilometres (1.3 mi) northeasterly, up to the municipal limit of Sainte-Marie-de-Beauce;
• 2.4 kilometres (1.5 mi) north-east, crossing route 171, up to its confluence.

The Vallée river empties on the west bank of the Chaudière River, in Sainte-Marie-de-Beauce. This confluence is located 0.6 kilometres (0.37 mi) upstream from Île Perreault, 4.2 kilometres (2.6 mi) downstream from the bridge in the village of Sainte-Marie-de-Beauce and 4.0 kilometres (2.5 mi) upstream of the Scott bridge.

The toponym Rivière Vallée was formalized on August 8, 1977, at the Commission de toponymie du Québec.

• List of rivers of Quebec