The Rivière Rouge (in English: Red River) is a tributary of the west shore of Beaurivage River which is a tributary of the west bank of the Chaudière River (slope of the south bank of the St. Lawrence River). It flows in the municipalities of Saint-Agapit and Saint-Apollinaire in the Lotbinière Regional County Municipality, in the administrative region of Chaudière-Appalaches, in Quebec, in Canada.

The main neighboring watersheds of the Red River are:

• north side: Aulneuse River, Beaurivage River, St. Lawrence River;
• east side: Beaurivage River, Chaudière River;
• south side: Noire River, rivière aux Pins, Henri River, Beaurivage River;
• west side: Henri River, Bourret brook, rivière aux Cèdres, Noire River.

The Red River has its source in the municipality of Saint-Agapit, on the boundary with the municipality of Saint-Apollinaire. This head area is located south of highway 20, southeast of the village center of Saint-Apollinaire and north-west of the village of Saint-Agapit.

From its source, the Red River flows over 10.3 kilometres (6.4 mi) divided into the following segments:

• 1.5 kilometres (0.93 mi) eastward, to route 273;
• 3.8 kilometres (2.4 mi) easterly, along the municipal boundary, to the municipal boundary of Saint-Apollinaire;
• 3.0 kilometres (1.9 mi) towards the northeast, in Saint-Apollinaire, up to the limit of Lévis (sector "Saint-Étienne-de-Lauzon");
• 2.0 kilometres (1.2 mi) northeasterly, up to its confluence.

The Red River empties on the west bank of the Beaurivage River north of the hamlet "Pointe-Saint-Gilles", in Lévis.

The toponym "rivière Rouge" was made official on October 6, 1983, at the Commission de toponymie du Québec.

* List of rivers of Quebec