Nantucket Sound
General data
- Name: Nantucket Sound
- Water system: Atlantic Ocean
- Water type: Bay
- Progression: Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
Nantucket Sound is a roughly triangular area of the Atlantic Ocean offshore from the U.S. state of Massachusetts. It is 48 km long and 40 km wide, and is enclosed by Cape Cod on the north, Nantucket on the south, and Marthas Vineyard on the west. Between Cape Cod and Marthas Vineyard it is connected to the Vineyard Sound. Ports on Nantucket Sound include Nantucket and Hyannis, Massachusetts.