Martha's Vineyard is an island (including the smaller Chappaquiddick Island) off the south of Cape Cod in New England, known for being an affluent summer colony. The islands both form a part of the Outer Lands region. The estimated year-round population is 15,000 residents, however the summer population can swell to over 75,000 people. About 56% of the Vineyard’s 14,621 homes are seasonally occupied. The island is primarily known as a summer colony, and is accessible only by boat and by air. Nevertheless, its year-round population has grown considerably since the 1960s.