The
Farmington River is a river located in northwest
Connecticut, with major tributaries extending into southwest
Massachusetts. Via its longest branch (the West Branch), the Farmington's length increases to , making it the
Connecticut River's longest tributary by a mere over the major river directly to its north, the
Westfield River. The Farmington River's
watershed covers . The river historically played an important role in small-scale manufacturing in towns alongside it, but it is now mainly used for recreation and drinking water. The Farmington River Watershed Association is a non-profit organization for conservation and preservation of this river.