King's Highway 19, commonly referred to as Highway 19, is a provincially maintained highway in the Canadian province of Ontario, connecting Highway 3 in Tillsonburg with Highway 401 southeast of Ingersoll. The highway began as the Plank and Gravel Road, a toll road formed by the Ingersoll and Port Burwell Road Company. It was first assigned in 1930. Several extensions in the early 1930s took the route north to Highway 86 at Tralee. However, a significant amount of Highway 19 was decommissioned and turned over to local and county governments in 1997 and 1998.