East Setauket is a hamlet and census-designated place (CDP) on Long Island, in the town of Brookhaven, Suffolk County, New York, United States. It was first listed as a CDP prior to the 2020 census. Before that it was part of the Setauket-East Setauket CDP. The community is in northwestern Suffolk County, in the northwest part of the town of Brookhaven. The East Setauket is bordered by Setauket to the northwest, Poquott to the north, Port Jefferson to the northeast, Port Jefferson Station to the east, Terryville to the southeast, South Setauket to the south, Stony Brook to the southwest, and Stony Brook University to the west.

Notable residents