Amherst is a town in Erie County, New York, United States. It is a suburb of Buffalo. As of 2020, the town had a total population of 129,595. This represents an increase from 122,366 as reported in the 2010 census. It is the 14th most populated municipality in New York. The second-largest in area and the most populous suburb of Buffalo, the town of Amherst encompasses the village of Williamsville as well as the hamlets of Eggertsville, Getzville, Snyder, Swormville, and East Amherst.