Southport is a town in Chemung County, New York, United States. The population was 9,684 according to the 2020 census. The town is located in the southwestern corner of Chemung County and is southwest of the city of Elmira. It is part of the Elmira Metropolitan Statistical Area.

Chemung County is a county in the U.S. state of New York. The population was 84,148 as of the 2020 census. Its county seat is Elmira. Its name is derived from a Delaware Indian village whose name meant "big horn". The county is part of the Southern Tier region of the state.