Windham is a town in Windham County, Connecticut, United States. It contains the former city of Willimantic as well as the boroughs of Windham Center, North Windham, and South Windham. Willimantic, an incorporated city since 1893, was consolidated with the town in 1983. The population was 24,428 at the 2020 census. History Prior to the arrival of Europeans, the region was occupied by Algonquian peoples, including the Pequot, Mohegan, Narragansett, and Nipmuck. After the conclusion of the Pequot War in 1638, the Pequots ceased to exist as a tribe; after King Philip's War ended in 1678, the Narragansett and Nipmuck did as well, leaving the Mohegans the only native power in the region. The settlement of Windham was left to settlers by Joshua Uncas, son of Uncas, in a will dated 1675. Settlers moved in, and held their first town meeting on May 18, 1691. The tract was named the town of Windham in May 1692, and was incorporated into Hartford County in fall of 1693. Starting in the early nineteenth century, the town's center of activity moved from Windham to Willimantic, as the water power available there led to the establishment of factories. First established as a borough in 1833, it was incorporated as a separate city in 1893, then reincorporated into the town of Windham in 1983 as its industry declined. Sites listed on the National Register of Historic Places Dr. Chester Hunt Office – Windham Center Road (added November 6, 1970) Forty-Seventh Camp of Rochambeau's Army (added February 23, 2003) Fourth Camp of Rochambeau's Army (added February 8, 2003) Main Street Historic District (Windham, Connecticut) – 32, 50 and 54 North St. (added August 29, 1992) March Route of Rochambeau's Army: Scotland Road – Scotland Road, from intersection with Back Rd. to 80 Scotland Rd. (added July 6, 2003) Willimantic Armory – Pleasant Street (added October 12, 1985) Windham Center Historic District – state Routes 14 and 203 (added July 4, 1979) Geography According to the United States Census Bureau, the town has a total area of 27.9 square miles (72.3 km), of which, 27.1 square miles (70.1 km) of it is land and 0.9 square miles (2.2 km) of it (3.04%) is water. Climate Demographics As of the census of 2000, there were 22,857 people, 8,342 households, and 5,088 families residing in the town. The population density was . There were 8,926 housing units at an