Unadilla is a town in Otsego County, New York, United States. As of the 2010 census, the town had a population of 4,392. The name is derived from an Iroquois word for "meeting place". Unadilla is located in the southwestern corner of the county, southwest of Oneonta. The village of Unadilla is located in the southern part of the town. The mayor of Unadilla is Jason Cotten.

Otsego County is a county in the U.S. state of New York located within the Mohawk Valley Region. As of the 2020 census, the population was 58,524. The county seat is Cooperstown. The county's population center is Oneonta. The name Otsego is from a Mohawk or Oneida word meaning "place of the rock." The county is part of the Mohawk Valley region of the state.