Mystic is a village and census-designated place (CDP) in Groton and Stonington, Connecticut, United States.

Historically, Mystic was a significant Connecticut seaport with more than 600 ships built over 135 years starting in 1784. Mystic Seaport, one of the largest maritime museums in the United States, has preserved a number of sailing ships, such as the whaling ship Charles W. Morgan. The village is located upon the Mystic River, which flows into Fishers Island Sound and by extension Long Island Sound and the Atlantic Ocean. The Mystic River Bascule Bridge crosses the river in the middle of the village. The name “Mystic” is derived from the Pequot term “missi-tuk” describing a large river whose waters are driven into waves by tides or wind. The population was 4,205 at the 2010 census.

Before the 17th century, the Pequot people lived in this share of southeastern Connecticut. They were in manage of a considerable amount of territory, extending toward the Pawcatuck River to the east and the Connecticut River to the west.

To the northwest, the Five Nations of the Iroquois dominated the home linked by the Great Lakes and the Hudson River, allowing trading to occur amongst the Iroquois and the Dutch. The Pequots were decided just distant enough to be secure from any hard times that the Iroquois posed. The Pequot War profoundly affected the Mystic area between 1636 and 1638. In May 1637, captains John Underhill and John Mason led a mission through Narragansett land, along subsequently their allies the Narragansetts and Mohegans, and struck the Pequot Indian unity in Mystic in the event which came to be known as the Mystic massacre. On September 21, 1638, the colonists signed the Treaty of Hartford, officially ending the Pequot War.