Southampton is an incorporated village in the Town of Southampton in Suffolk County, on the South Fork of Long Island, in New York, United States. The population was 4,550 at the 2020 census, an increase of 46.3% from the 2010 census a decade earlier. The Incorporated Village of Southampton serves as the Town Seat of the Town of Southampton, and is the oldest and largest of communities in the summer colony known as The Hamptons.