Colebrook is a town in Litchfield County, Connecticut, United States. The population was 1,485 at the 2010 census. Colebrook was named after Colebrooke in the English county of Devon; the reason is now unknown.
As of the census of 2000, there were 1,471 people, 566 households, and 419 families residing in the town. The population density was 46.7 people per square mile (18.0/km2). There were 656 housing units at an average density of 20.8 per square mile (8.0/km2). The racial makeup of the town was 97.01% White, 0.68% African American, 0.61% Asian, 0.88% from other races, and 0.82% from two or more races. Hispanic or Latino of any race were 2.45% of the population.
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.
In the town, the population was spread out, with 24.5% under the age of 18, 4.2% from 18 to 24, 29.6% from 25 to 44, 27.5% from 45 to 64, and 14.1% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 102.1 males. For every 100 females age 18 and over, there were 101.5 males.
The median income for a household in the town was $58,684, and the median income for a family was $64,286. Males had a median income of $42,647 versus $35,987 for females. The per capita income for the town was $29,789. About 1.4% of families and 2.6% of the population were below the poverty line, including none of those under age 18 and 9.0% of those age 65 or over.