Colebrook is a town in Coos County, New Hampshire, United States. The population was 2,301 at the 2010 census. Situated in the Great North Woods Region, it is bounded on the west by the Connecticut River and home to Beaver Brook Falls Natural Area.The main village of the town, where 1,394 people resided at the 2010 census, is defined as the Colebrook census-designated place, and is located at the junction of U.S. Route 3 with New Hampshire Route 26. The town also includes the villages of Kidderville, Upper Kidderville, and Factory Village.Colebrook is part of the Berlin, NH−VT Micropolitan Statistical Area.