Block Island Sound is a strait in the open

Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ...

, approximately wide, separating Block Island from the coast of mainland

Rhode Island Rhode Island (, like ''road'') is a state in the New England region of the Northeastern United States. It is the smallest U.S. state by area and the seventh-least populous, with slightly fewer than 1.1 million residents as of 2020, but it ...

. On the west, it extends to

Montauk Point Montauk ( ) is a hamlet and census-designated place (CDP) in the Town of East Hampton in Suffolk County, New York, on the eastern end of the South Shore of Long Island. As of the 2020 United States census, the CDP's population was 4,318. The ...

on the eastern tip of Long Island, as well as Plum Island,

Gardiners Island Gardiner's Island is a small island in the Town of East Hampton, New York, in Eastern Suffolk County. It is located in Gardiner's Bay between the two peninsulas at the east end of Long Island. It is long, wide and has of coastline. The isl ...

, and

Fishers Island Fishers Island (Pequot: ''Munnawtawkit'') is an island that is part of Southold, New York, United States at the eastern end of Long Island Sound, off the southeastern coast of Connecticut across Fishers Island Sound. About long and wide, it ...

, all in the state of New York. Geographically, Block Island Sound extends west to Long Island Sound and east to

Rhode Island Sound Rhode Island Sound is a strait of water off the coast of the U.S. state of Rhode Island at the mouth of Narragansett Bay. It forms the eastern extension of Block Island Sound and opens out the Atlantic Ocean between Block Island and Martha's V ...

. Three

United States Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...

warships have been named after the sound. See USS '' Block Island.''

References

Straits of New York (state) Straits of Rhode Island Intracoastal Waterway New Shoreham, Rhode Island Bodies of water of Washington County, Rhode Island {{RhodeIsland-stub