Wilton is a town in Fairfield County, Connecticut, United States. As of the 2020 census, the town population was 18,503. The town is part of the Western Connecticut Planning Region. Officially recognized as a parish in 1726, Wilton today is a residential community with open lands, historic architecture such as the Round House, and many colonial homes. Many residents commute to nearby cities such as Stamford or New York City.