Southampton, officially the Town of Southampton, is a town in southeastern Suffolk County, New York, partly on the South Fork of Long Island. As of the 2020 U.S. census, the town had a population of 69,036. Southampton is included in the stretch of shoreline prominently known as the Hamptons.

Suffolk County is the easternmost county in the U.S. state of New York. It is bordered to its west by Nassau County, to its east by Gardiners Bay and the Atlantic Ocean, to its north by Long Island Sound, and to its south by Great South Bay. The county is part of the Long Island region of the state, of which it comprises the eastern two-thirds.