Mason's Island

Mason's Island (Algonquin: Chippachaug); an inhabited island at the mouth of the Mystic River, in Stonington, Connecticut; part of the region of Mystic, Connecticut. The island was named after Major John Mason who was granted the island in recognition of his leadership of English troops and neighboring tribal nations in the brutal defeat of the Pequod nation at Mystic.

Unlike Fishers Island, Mason's Island did not become part of New York. It remains under the political jurisdiction of the State of Connecticut. There is currently a petition to make Fishers Island part of Connecticut .

Mason's Island is connected to the mainland by a causeway. Fishing is permitted from the causeway connecting Mason's Island to Mystic. Some of the island is owned by the Mason's Island Company and is regulated by property deeds. A quarry supplying rough granite for breakwaters (e.g. at Newport, Rhode Island) was located on the western side of the island. The Mason's Island Marina and the Mystic River Marina are located on the north end of the island.