Dukes County is a county located in the state of Massachusetts, primarily known for its islands, including Martha's Vineyard and Nantucket. It was established in 1683 and is part of the Barnstable metropolitan area. The county seat is Edgartown, which is one of the most popular towns on Martha's Vineyard. The county covers a total area of approximately 105 square miles, with a significant portion being water. Dukes County is known for its scenic landscapes, beaches, and vibrant tourism industry, attracting visitors during the summer months for recreational activities and cultural events.