Manchester is a town in Ontario County, New York, United States. The population was 9,406 at the 2020 census. The town was named after one of its villages, which in turn was named after the original Manchester in England. It was formed in 1822 from the town of Farmington.

Ontario County is a county in the U.S. State of New York. As of the 2020 census, the population was 112,458. The county seat is Canandaigua. The county is part of the Finger Lakes region of the state.