Killingly is a town in Windham County, Connecticut, United States. Killingly is the largest town by population in the Northeastern Connecticut Planning Region. The population was 17,752 at the 2020 census. It consists of the borough of Danielson and the villages of Attawaugan, Ballouville, Dayville, East Killingly, Rogers, and South Killingly.
20 States, 20K Miles, 11 National Parks – and Counting!
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