Block Island Sound

General data
- Name: Block Island Sound
- Basin: Atlantic Ocean
- Water type: Bay
- Progression: Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
Description
Block Island Sound is a marine sound in the open Atlantic Ocean, approximately 16 km wide, separating Block Island from the coast of mainland Rhode Island. On the west, it extends to Montauk Point on the eastern tip of Long Island, as well as Plum Island, Gardiners Island, and Fishers Island, all in the state of New York. Geographically, Block Island Sound extends west to Long Island Sound and east to Rhode Island Sound.