| Rivière des Poitras | |
| Pushpin Map: | Quebec |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Quebec |
| Subdivision Type3: | Region |
| Subdivision Name3: | Chaudière-Appalaches |
| Subdivision Type4: | MRC |
| Subdivision Name4: | Montmagny Regional County Municipality |
| Source1: | Forest streams |
| Source1 Location: | Saint-Pierre-de-la-Rivière-du-Sud |
| Mouth: | Morigeau River |
| Mouth Location: | Saint-François-de-la-Rivière-du-Sud |
| Progression: | Morigeau River, rivière du Sud (Montmagny), St. Lawrence River |
| Tributaries Left: | (upstream) |
| Tributaries Right: | (upstream) |
The rivière des Poitras is a tributary of the south bank of the Morigeau River which flows on the south-eastern bank of the rivière du Sud (Montmagny); the latter flows north-east to the south shore of the St. Lawrence River.
The Poitras river flows in the municipalities of Saint-Pierre-de-la-Rivière-du-Sud and Saint-François-de-la-Rivière-du-Sud, in the Montmagny Regional County Municipality, in the administrative region of Chaudière-Appalaches, in Quebec, in Canada.
The main neighboring watersheds of the Poitras river are:
The Poitras river has its source near a country road, in the western part of the municipality of Saint-Pierre-de-la-Rivière-du-Sud, at south of the village of Montmagny and east of the hamlet of Morigeau.
From its source, the Poitras river flows in parallel, on the south side of the Morigeau River. The course of the river descends on, divided into the following segments:
The Poitras river flows on the south-eastern shore of the Morigeau River. This confluence is located at north-east of the Martineau hamlet.[1]
The toponym Rivière des Poitras was formalized on December 5, 1968, at the Commission de toponymie du Québec.[2]