| Otter River | |
| Source1 Location: | Saint-Fabien-de-Panet, Quebec, Les Etchemins Regional County Municipality, Chaudière-Appalaches, Quebec |
| Source1 Coordinates: | 46.4786°N -70.2514°W |
| Mouth Location: | Township T11 R17 WELS, Aroostook County, Maine, |
| Mouth Coordinates: | 46.6186°N -69.9997°W |
| Tributaries Left: | Ruisseau de la Dame à Proulx |
| Tributaries Right: | (from the mouth) Sauvage brook, Lejeune brook, discharge of "Lac du Canard". |
The Otter River (fr|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:
The "Otter River" mostly flows Southeast into forest areas, in a small valley and crosses the Canada-US border.
The "Otter Otter" rises between two mountains. This source is located at Northeast from the village of Saint-Fabien-de-Panet, Quebec.
The "Otter River" flows over on as is:
The "River Otter" pours on the West bank of the Northwest Branch Saint John River. This confluence is located at:
From the confluence of "Otter River", the Northwest Branch Saint John River flows Southeast up to Saint John River (Bay of Fundy). It flows to the East and the Northeast, crossing the Maine, then East and Southeast through the New Brunswick. Finally, the current flows on the North bank of the Bay of Fundy which opens to the southwest on the Atlantic Ocean.
The place name "Otter River" was formalized December 5, 1968, at the Commission de toponymie du Québec (Quebec Places Names Board).[2]