Willoughby River
General data
- Name: Willoughby River
- Water system: St. Lawrence River
- Water type: River
- Progression: Barton River -> Lake Memphremagog -> Magog River -> Saint-Francois River -> Lake Saint Pierre -> St. Lawrence River -> Gulf of St. Lawrence -> Atlantic Ocean -> Planet Earth
- Climates: Continental
- Continents: North America
- Countries: United States of America
The Willoughby River is a tributary of the Barton River, flowing on 18.6 km (11.6 mi), in the Orleans County, Vermont, United States.
This river flows to northwest, southwest and northwest, crossing the municipalities of Westmore, Vermont, Orleans and Brownington. Its course runs through forested areas, agricultural and urban.