High Quality Content by WIKIPEDIA articles! Cherry Grove (often referred to locally as The Grove) is an unincorporated hamlet in the Town of Brookhaven, Suffolk County, New York, United States. It is located on Fire Island, a barrier island separated from the southern side of Long Island by the Great South Bay. The hamlet has approximately 300 houses on 41 acres (170,000 m2), a summer seasonal population of 2,000 and a year-round population of 15.