Long Island Sound

Long Island Sound is shown highlighted in pink between Connecticut (to the north) and Long Island (to the south)

The Long Island Sound is an estuary of the Atlantic Ocean. It is in the United States. The US states of Connecticut (to the north) and Long Island, New York (to the south) share it. The Connecticut River at Old Saybrook, Connecticut connects to the sound. To the west, The Bronx and Westchester County, New York connect to the East River. To the east, the Block Island Sound connects to the sound.

Long Island Sound Media

Long Island Sound at night as seen from space
Manhasset Bay, as seen on a map from 1917
An aerial photo of the North Shore of Nassau County on Long Island, looking west. The Cow Neck Peninsula is visible in the center, with Manhasset Bay immediately above it and Hempstead Harbor immediately below it.
James Goodwyn Clonney, Fishing Party on Long Island Sound off New Rochelle, 1847
Diamondback terrapins (Malaclemys terrapin) are the only aquatic turtles to reside in brackish water, which makes the Long Island Sound estuary a special habitat for the Northern subspecies.
Osprey (Pandion haliaetus), a fish-eating raptor, sitting on a tree swallow's nest box in the marsh at Hammonasset Beach State Park, Madison, CT. Ospreys are frequent summer residents of areas like Long Island Sound and other coastal areas in North America.
Archibald Cary Smith, Long Island Sound, 1911
Planting oyster shells in Long Island Sound in order to catch the species reproductive set, 1919