Hagersville is a town in Haldimand County, Ontario, Canada. It is about 45 kilometers southwest of Hamilton, Ontario. According to the 2011 census, the town's population is 2,579.
The town started in 1855, when a roadway (now Ontario Highway 6) was built through the area. It started growing after the Canadian Southern Railway built a line through the area in 1870. During World War II, the Royal Canadian Air Force built a training school near the town.
The Ohsweken Demons of the Canadian Lacrosse League plays its home games at Hagersville.