There were 566 households out of which 32.2% had children under the age of 18 living with them, 65.2% were married couples living together, 5.1% had a female householder with no husband present, and 25.8% were non-families. 19.6% of all households were made up of individuals and 7.1% had someone living alone who was 65 years of age or older. The average household size was 2.60 and the average family size was 3.01. Colebrook is a town in Litchfield County, Connecticut, United States. The population was 1,471 at the 2000 census. Colebrook was named after Colebrooke, in the English county of Devon.