Mystic is a village and census-designated place (CDP) in New London County, Connecticut, in the United States. The population was 4,205 at the 2010 census. Mystic has no independent government because it is not a legally recognized municipality in the state of Connecticut. Rather, Mystic is located within the towns of Groton (west of the Mystic River, and also known as West Mystic) and Stonington (east of the Mystic River).
Historically, Mystic was a leading seaport of the area, and the story of Mystic's nautical connection is told at Mystic Seaport, the nation's largest maritime museum, which has preserved a number of sailing ships (most notably the whaleship Charles W. Morgan) and seaport buildings. The village is located on the Mystic River, which flows into Long Island Sound, providing access to the sea. The Mystic River Bascule Bridge crosses the river in the center of the village. According to the Mystic River Historical Society, the name Mystic, as the modern spelling has it, is derived from the Pequot term "missi-tuk", describing a large river whose waters are driven into waves by tides or wind.