Wauregan is a village located in the northwestern corner of the town of Plainfield, Connecticut, 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.