| Landroche River | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Quebec |
| Subdivision Type3: | Region |
| Subdivision Name3: | Centre-du-Québec |
| Subdivision Type4: | MRC |
| Subdivision Name4: | Nicolet-Yamaska Regional County Municipality |
| Subdivision Type5: | Municipality |
| Subdivision Name5: | Saint-Elphège and Baie-du-Febvre |
| Length: | 10km (10miles) |
| Source1: | Agricultural streams |
| Source1 Location: | Baie-du-Febvre |
| Source1 Coordinates: | 46.1064°N -72.7035°W |
| Source1 Elevation: | 30m (100feet) |
| Mouth: | Lake Saint-Pierre, St. Lawrence River |
| Mouth Location: | Baie-du-Febvre |
| Mouth Coordinates: | 46.1531°N -72.7689°W |
| Mouth Elevation: | 6m (20feet) |
| Tributaries Left: | (upstream) cours d'eau des Trente, ruisseau Roland-Lemire, cours d'eau Dionne |
| Tributaries Right: | (upstream) ruisseau Bourgoin, cours d'eau Geoffroy |
| Country: |  Canada |
The Landroche River is a tributary on the south shore of Lake Saint-Pierre which is crossed to the northeast by the St. Lawrence River. The Landroche river flows in the municipality of Baie-du-Febvre, in the Nicolet-Yamaska Regional County Municipality (MRC), in the administrative region of Centre-du-Quebec, in Quebec, in Canada.
The main neighboring hydrographic slopes of the Landroche river are:
The Landroche river draws its source from agricultural streams located in the territory of the municipality of Baie-du-Febvre, almost at the limit of Saint-Elphège. The Landroche river begins at the confluence of the Roland-Lemire stream and the Geoffroy stream. This confluence is located on the municipal boundary of Saint-Elphège and Baie-du-Febvre.
From its source, the course of the Landroche river flows on towards the north-west, generally in an agricultural zone, with a drop of . The course of the river intersects Chemin du Pays-Brûlé, route 132 and Chemin des Huit.[1]
The Landroche River flows northwest in an agricultural zone, crossing route 132. The river empties on the flats of Pierre à Chaux on the south shore of Lake Saint-Pierre, near Pointe Gabriel, north-east of the village of Baie-du-Febvre.
The toponym "rivière Landroche" was made official on August 8, 1980, at the Commission de toponymie du Québec.[2]