Martha's Vineyard is an island in Massachusetts, located just south of Cape Cod. It is renowned as a luxurious and affluent summer resort with white sandy beaches, a lighthouse, and a rich maritime history. Martha's Vineyard occupies a significant portion of Dukes County, Massachusetts, which includes the Chappaquiddick Peninsula, the Elizabeth Islands, and Normans Land.
Dukes County is a county in the state of Massachusetts. According to the 2020 census, the county had a population of 20,600. The county comprises 32 named islands, the largest of which is Martha's Vineyard. The county seat is Edgartown. The largest town is Oak Bluffs.