Cassville is a hamlet in Oneida County, New York, United States. Cassville is situated on and adjacent to New York State Route 8 in the town of Paris.
- Brad Roberts, an ice hockey player for the Youngstown SteelHounds, is a Cassville native.
- William R. Williams (1884–1972), a Republican member of the United States House of Representatives from New York, lived and died in Cassville.
Coordinates: 42°56′45″N 75°15′16″W / 42.94583°N 75.25444°W