Wellsburg is a village in Chemung County, New York, United States. The population was 580 at the 2010 census. The village is named after the pioneer family of Abner Wells (1737–1797) who came from Southold on Long Island.

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.