Killingly [Windham County] Connecticut was settled in 1700 and incorporated in 1708. It was named from Killingly Manor near Pontefract, Yorkshire. Its Indian name is Aspinock.Area, 50.0 sq. miles. Population, est., 16,057. Voting districts, 6. Principal industries, molded rubber products, plastic products, surgical supplies, mattresses, fiber optics, cosmetics, distribution centers, windows, molded circuits, transformer board, poron, electrical insulation, computer bus bars, knives, snack foods.Killingly encompasses the villages of Attawaugan, Ballouville, Dayville, East Killingly, Rogers, South Killingly and the Borough of Danielson.