Wauregan is a village located in the northwestern corner of the town of Plainfield, Connecticut in the United States. Originally a mill village, Wauregan was established around a cotton mill powered by the Quinebaug River. Wauregan and West Wauregan, across the Quinebaug in the town of Brooklyn, together comprise the Wauregan census-designated place, with a population of 1,205 at the 2010 census.

Plainfield is a town in Windham County, Connecticut, United States. The town is part of the Northeastern Connecticut Planning Region. The population was 14,973 at the 2020 census. The town comprises four villages: Plainfield, Moosup, Wauregan, and Central Village. Each village has their own respective United States Post Office and fire department. The entire town is serviced by the 860 area code.