| Weller River (Stream) | |
| Pushpin Map: | Quebec |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Quebec |
| Subdivision Type3: | Region |
| Subdivision Name3: | Capitale-Nationale, Mauricie |
| Subdivision Type4: | Regional County Municipality |
| Subdivision Name4: | Portneuf Regional County Municipality |
| Subdivision Type5: | Municipalities |
| Subdivision Name5: | Saint-Ubalde |
| Length: | 16.7km (10.4miles) |
| Discharge1 Location: | Saint-Ubalde |
| Source1: | Lac Carillon |
| Source1 Location: | Saint-Ubalde, MRC Portneuf Regional County Municipality |
| Source1 Coordinates: | 46.836°N -72.196°W |
| Source1 Elevation: | 219m (719feet) |
| Mouth: | Blanche River |
| Mouth Location: | Saint-Ubalde |
| Mouth Coordinates: | 46.756°N -72.2181°W |
| Mouth Elevation: | 146m (479feet) |
| Tributaries Left: | (Upward from the mouth) Décharge des lacs aux Guêpes, à l'Anguille et en Coeur, décharge d'un ensemble de petits lacs. |
| Tributaries Right: | (Upward from the mouth) Décharge du Grand lac à Désalliers, décharge de deux lacs non identifiés. |
The Weller River (Stream) is a tributary left bank of the Blanche River (St-Casimir) whose confluence is found east of the municipality of Saint-Ubalde, in the Portneuf Regional County Municipality, in the administrative region of Capitale-Nationale, in the province of Quebec in Canada.
Forestry is the main economic activity in the upper part of this hydrographic slope; agriculture, in the lower part.[1]
The Weller River rises at Lac Carillon (length: ; altitude:) which straddles the boundary of the municipalities of Saint-Ubalde (Quebec) and Notre-Dame-de-Montauban. The resort developed in certain segments of the northwest and southwest shores of the lake because of Enchanted Street (north shore) and Chemin des Ballades (southwest shore). The mouth of the lake is located at the bottom of a small bay southwest of the lake.
The term "Weller" is a surname of German origin.
The toponym "Rivière Weller" was registered with the Place names bank of the Commission de toponymie du Québec on May 5, 1981.[2]