Killingworth is a town in Middlesex County, Connecticut. The town's name can easily be confused with another Connecticut town, Killingly; or a Vermont ski area, Killington. The population was 6,018 at the 2000 census.
According to the United States Census Bureau, the town has an area of 35.8 square miles (93 km2). Of this total, 35.3 square miles (91 km2) is dry land and 0.5 square miles (1.3 km2) – or 1.34% – is water-covered.
Killingworth also contains Chatfield Hollow State Park.
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