Ninigret is a coastal lagoon in Charlestown, Rhode Island, in the United States, located at 41°22′45″N 71°38′43″W / 41.3792677°N 71.6453401°W / 41.3792677; -71.6453401.

Averaging 4.3 ft (1.3 m) deep, Ninigret Pond has a salinity level of 24 parts per thousand.

[9] As a result of heavy development along the eastern shore, there are indications that water quality is degrading; however, restoration efforts are in place.

The Coastal Resources Management Council and the Army Corps of Engineers spent in excess of $4.1 million to remove harmful sand accumulations.

[11] During the 1960s, Ninigret Pond was included as part of one of the first "integrated multidisciplinary studies of a coastal marine ecosystem".