Willimantic, Connecticut
Census-designated place
Science Building Eastern Connecticut State University
Nickname(s):  Thread City, Frog City
Windham County and Connecticut  Southeastern Connecticut Planning Region and Connecticut
Coordinates: 41°43′N 72°13′W / 41.717°N 72.217°W / 41.717; -72.217
Country	United States
U.S. state	Connecticut
County	Windham
Region	Southeastern CT
Named for	Willimantic River
Area [1]
• Total	5.554 sq mi (14.38 km2)
• Land	5.421 sq mi (14.04 km2)
• Water	0.133 sq mi (0.34 km2)
Population  (2020)[2]
• Total	18,149
• Density	3,348/sq mi (1,293/km2)
Time zone	UTC-5 (Eastern)
• Summer (DST)	UTC-4 (Eastern)
ZIP Code	06226[3]
Area code(s)	860/959
Airport	Windham Airport
Major highways
Website	Official website

Willimantic, Connecticut is a census-designated place and former city. It is in the town of Windham, Windham County. About 18,149 people lived there at the 2020 census.^[2] Eastern Connecticut State University and the Windham Textile and History Museum are in Willimantic.

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