| Rivière du Moulin | |
| Pushpin Map: | Quebec |
| 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: | Arthabaska Regional County Municipality |
| Length: | 5.9km (03.7miles) |
| Source1: | Streams |
| Source1 Location: | Saint-Louis-de-Blandford |
| Source1 Coordinates: | 46.3085°N -71.9459°W |
| Source1 Elevation: | 110m (360feet) |
| Mouth: | Bécancour River |
| Mouth Location: | Saint-Louis-de-Blandford |
| Mouth Coordinates: | 46.2506°N -72.0225°W |
| Mouth Elevation: | 90m (300feet) |
| Progression: | Bécancour River, St. Lawrence River |
| Tributaries Left: | (upstream) |
| Tributaries Right: | (upstream) |
| Country: |  Canada |
The rivière du Moulin (in English: Mill River) is a tributary of the Bécancour River which flows on the south shore of the St. Lawrence River into the Estuary of Saint Lawrence.
The Rivière du Moulin flows entirely in the municipality of Saint-Louis-de-Blandford, located in the Arthabaska Regional County Municipality, in the administrative region of Centre-du-Québec, in Québec, in Canada.
The main hydrographic slopes near the "rivière du Moulin" are:
The Moulin river takes its source in the locality "La Petite Belgique", in the area south of highway 20, in the municipality of Saint-Louis-de-Blandford. This area is located north of the Bécancour River and northeast of the village center of Saint-Louis-de-Blandford.
From its head area, the Moulin river flows over divided into the following segments:
The Moulin River flows on the north bank of the Bécancour River. Its confluence is located upstream from the highway 20 bridge and downstream from the route 162 bridge, which passes through the village of Saint-Louis-de-Blandford.
The toponym "rivière du Moulin" was made official on November 17, 1979, at the Commission de toponymie du Québec.[2]