Oak Beach is a small community and census-designated place located near the eastern end of Jones Beach Island, a barrier island between the Atlantic Ocean and the Great South Bay of Long Island. The community is part of the village of Babylon in Suffolk County, New York, United States. The eastern part, the Oak Island Beach Association, is gated, whereas the western part is not. The Oak Beach CDP was first listed prior to the 2020 census. Prior to that the community was part of the Oak Beach-Captree census-designated place.