French River (Massachusetts)

The French River is a river in south-central Massachusetts and northeastern Connecticut, USA.

The river rises near Leicester, Massachusetts, and flows generally southwards through Auburn, Oxford, and along the town line between Webster and Dudley; it then enters Connecticut where it joins the Quinebaug River at Thompson, just northeast of Putnam. The Quinebaug in turn flows into the Shetucket River and ultimately the Thames River to empty into the Long Island Sound.

The river's total length is 25.3 mi, of which 18.8 mi are in Massachusetts. It drains a watershed area of about 95 sqmi, containing 67 lakes and ponds, 38 of which cover at least 10 acre. Only one lake in its basin is larger than 500 acre, namely Lake Chaubunagungamaug (Webster Lake) in Webster, Massachusetts at 1195 acre.

French River was so named from a settlement of French Protestants in Oxford.