| Otter River | |
|---|---|
 | |
| Physical characteristics | |
| Source | |
| • location | Saint-Fabien-de-Panet, Quebec, Les Etchemins Regional County Municipality, Chaudière-Appalaches, Quebec |
| • coordinates | 46°28′43″N 70°15′05″W / 46.47861°N 70.25139°W |
| • elevation | 400 metres (1,300 ft) |
| Mouth | |
• location | Township T11 R17 WELS, Aroostook County, Maine,  United States |
• coordinates | 46°37′07″N 69°59′59″W / 46.61861°N 69.99972°W |
• elevation | 336 metres (1,102 ft) |
| Length | 14.9 kilometres (9.3 mi) |
| Basin features | |
| Tributaries | |
| • left | Ruisseau de la Dame à Proulx |
| • right | (from the mouth) Sauvage brook, Lejeune brook, discharge of "Lac du Canard". |
The Otter River (French: Rivière à la Loutre) is a tributary of the Northwest Branch Saint John River, flowing in Quebec (Canada) and in Maine (United States). This river crosses the following administrative territories:
- Les Etchemins Regional County Municipality in the administrative region of Chaudière-Appalaches, in South of Quebec, in Canada, crossing through the municipalities of Saint-Fabien-de-Panet, Quebec, Lac-Frontière, Quebec and Saint-Just-de-Bretenières, Quebec;
- Aroostook County (Maine), in United States: Township 11 Range 17 WELS.
The "Otter River" mostly flows Southeast into forest areas, in a small valley and crosses the Canada-US border.