Cayuga is an unincorporated community and county seat of Haldimand County, Ontario, Canada located at the intersection of Highway 3 and Munsee Street and along the Grand River. Cayuga is about a 20-minute drive from Lake Erie and 30 minutes south of Hamilton and 115 minutes south of Toronto and consequently it has some cottages and recreational properties in the area. In the past there was some light industry. It has the local district detachment for the Ontario Provincial Police.