Coleytown is a census-designated place (CDP) in the town of Westport, Fairfield County, Connecticut, United States. It occupies the northeastern corner of the town and is bordered to the north by the town of Weston and to the east by the town of Fairfield. As of the 2020 census, Coleytown had a population of 3,522.
Coleytown was first listed as a CDP prior to the 2020 census.