Stonington is a town located on Long Island Sound in New London County, Connecticut. The municipal limits of the town include the borough of Stonington, the villages of Pawcatuck, Lords Point, and Wequetequock, and the eastern halves of the villages of Mystic and Old Mystic. Stonington is part of the Southeastern Connecticut Planning Region. The population of the town was 18,335 at the 2020 census. The town is home to many restored homes and preserves its long nautical history.