| Rivière du Petit Sault | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Quebec |
| Subdivision Type3: | Region |
| Subdivision Name3: | Bas-Saint-Laurent |
| Subdivision Type4: | MRC |
| Subdivision Name4: | Rivière-du-Loup |
| Length: | 12.2km (07.6miles) |
| Source1: | Agricultural streams |
| Source1 Location: | Saint-Éloi |
| Source1 Coordinates: | 48.0531°N -69.1911°W |
| Source1 Elevation: | 147m (482feet) |
| Mouth: | Gulf of Saint Lawrence |
| Mouth Location: | L'Isle-Verte |
| Mouth Coordinates: | 48.0581°N -69.2906°W |
| Mouth Elevation: | 0m (00feet) |
The rivière du Petit Sault (English: Small Sault river) flows through the municipalities of Saint-Éloi (MRC Les Basques Regional County Municipality) and L'Isle-Verte (MRC of Rivière-du-Loup Regional County Municipality), in the administrative region of Bas-Saint-Laurent, in Quebec, in Canada.
The Petit Sault River is a tributary of the southeastern coast of the St. Lawrence River at the L'Isle-Verte.
The Petit Sault river takes its source from agricultural streams located in the municipality of Saint-Éloi. This source is located at to the southeast of the southeast coast of the estuary of Saint Lawrence, at to the southwest from a bend in the Trois Pistoles River and at northeast of the center of the village of Saint-Éloi .
From its source, the Petits Saults river flows in an agricultural zone over according to the following segments:
The Petit Sault river flows into Anse Verte, on the Loups Marins flats, of the St. Lawrence River, in the village of the municipality of L'Isle-Verte, facing the Île aux Pommes, located from the shore. This confluence is located northeast of the center of the village of L'Isle-Verte.
The toponym "rivière du Petit Sault" was made official on December 4, 1980, at the Commission de toponymie du Québec.[1]