The Trout River is a tributary of the Missisquoi River, flowing successively in municipalities of Montgomery, in Enosburg and in East Berkshire, in Franklin County, in northern Vermont in the United States.

The surface of the Trout River is generally frozen from mid-December to mid-March, with the exception of the rapids; however, safe circulation on the ice generally takes place from late December to early March.

The Trout River rises at the confluence of Jay Brook (coming from East) and Wade Brook (coming from South-East) in Franklin County, Vermont, East of Montgomery, Vermont, at an altitude of .

From there, the current goes generally westward on 66.3 km (41.2 mi) up to eastern shore of Lake Champlain.

[1] The toponym "Trout River" was registered on October 29, 1980, in the USGS (US Geological Survey).