Martha's Vineyard (including the smaller Chappaquiddick Island) is an island off the south of Cape Cod in New England. The islands both forming a part of the Outer Lands region. Often called just "the Vineyard," the island has a land area of 87.48 square miles (231.75 km²) and is the 57th largest island in the United States, and the third largest on the East Coast of the United States.
It is located in the state of Massachusetts, in Dukes County, which also includes Cuttyhunk and the other Elizabeth Islands, as well as the island of Nomans Land). It was home to one of the earliest known deaf communities in the United States; consequently, a special dialect of sign language, Martha's Vineyard Sign Language (MVSL), developed on the island.