| Rivière du Pin | |
| 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: | Les Etchemins Regional County Municipality, Bellechasse Regional County Municipality, Montmagny Regional County Municipality |
| Source1: | Mountain stream |
| Source1 Location: | Saint-Magloire |
| Mouth: | Rivière du Sud (Montmagny) |
| Mouth Location: | Armagh |
| Progression: | Rivière du Sud (Montmagny), St. Lawrence River |
| Tributaries Left: | (upstream) |
| Tributaries Right: | (upstream) Gabriel River, ruisseau de la Grande Ligne |
The rivière du Pin is a tributary of the south bank of the rivière du Sud (Montmagny) which flows north-east to the south bank of the St. Lawrence, in the administrative region of Chaudière-Appalaches, in Quebec, in Canada.
The Rivière du Pin crosses the regional county municipalities (RCM) of:
The Pin river has its source in a mountainous area in the municipality of Saint-Magloire in the Notre Dame Mountains.
From its source, the Pin river "flows in a valley encircled on according to the following segments:
The Pin river flows on the south shore of the rivière du Sud (Montmagny) at the limit of the municipalities of Armagh and Sainte-Euphémie-sur-Rivière-du-Sud.
The toponym Rivière du Pin was formalized on December 5, 1968, at the Commission de toponymie du Québec.[2]