Tioga County is a county in the U.S. state of New York. As of the 2020 census, the population was 48,455. Its county seat is Owego. Tioga County is part of the Binghamton metropolitan area. The county is part of the Southern Tier region of the state.

Owego is a village in and the county seat of Tioga County, New York, United States. The population was 3,896 at the 2010 census. It is part of the Binghamton Metropolitan Statistical Area. The name is derived from the Iroquois word Ahwaga, meaning where the valley widens.