| Portage 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: | Arthabaska Regional County Municipality |
| Subdivision Type5: | Municipalities |
| Subdivision Name5: | Saint-Valère, Daveluyville |
| Length: | 12.5km (07.8miles) |
| Source1: | Agricultural and forest streams |
| Source1 Location: | Saint-Rosaire |
| Source1 Coordinates: | 46.18°N -72.1061°W |
| Source1 Elevation: | 106m (348feet) |
| Mouth: | Bécancour River |
| Mouth Location: | Daveluyville |
| Mouth Coordinates: | 46.1967°N -72.1842°W |
| Mouth Elevation: | 39m (128feet) |
| Progression: | Bécancour River, St. Lawrence River |
| Tributaries Left: | (upstream) ruisseau Morissette, ruisseau Soucy, ruisseau David-Bourque |
| Tributaries Right: | (upstream) ruisseau Beauchesne, ruisseau Blaise, ruisseau "Le Petit Portage" |
| Country: |  Canada |
The rivière du Portage (in English: Portage Rivere) is a tributary of the Bécancour River which flows on the south shore of the St. Lawrence River. The "rivière du Portage" flows in the municipalities of Saint-Valère and Daveluyville, in the Arthabaska Regional County Municipality (MRC), in the administrative region from Centre-du-Québec, to Quebec, to Canada.
The main hydrographic slopes of the "Portage river" are:
The "Portage River" has its source in an agricultural area of the municipality of Saint-Valère, south of the Defoy hamlet (of Daveluyville), on the east side of route 261 and north of the Bulstrode River.
From its source, the Portage River flows over, especially in agricultural (or forest, in places) territory according to the following segments:
The Portage River flows onto the south shore of the Bécancour River, just downstream from Portage Island and downstream from the village of Daveluyville.
The toponym "rivière du Portage" was made official on December 5, 1968, at Commission de toponymie du Québec.[2]