Great River is a suburban hamlet and CDP within the Town of Islip in Suffolk County, New York. Great River is located on the south shore of Long Island, adjoining the Great South Bay, protected from the Atlantic Ocean by Fire Island. Great River’s name derives from Connetquot, an Algonquian word for “Great River.” Prior to the 1900s Great River was primarily home to wealthy families on mansion estates. As of the 2010 census, the population of Great River was 1,489. Great River is home to the Bayard Cutting Arboretum, a popular spot to pay visit to by locals and tourists, year round.
Population: 1,489
Zip Code: 11739
Area Code: 631
Elevation: 13′
