The Farmington River is a 46.7 mi river located in northwest Connecticut, with major tributaries extending into southwest Massachusetts.> The Farmington River's watershed covers 609 square miles. Historically, the river played an important role in small-scale manufacturing in towns along its course, but it is now mainly used for recreation and drinking water.
Country: United States
State: Massachusetts and Connecticut
Source: Outlet of Hayden Pond (West Branch of the Farmington River)
2nd source: Barkhamsted Reservoir (East Branch of the Farmington River)
Source confluence: confluence of the East Branch and West Branch
Mouth: confluence with Connecticut River
Length: 80.4 mi (129.4 km), from source of West Branch