Ontario Highway 519

Secondary Highway 519, commonly referred to as Highway 519, is a provincially maintained highway in the Canadian province of Ontario. The highway is 30.5 km (19.0 mi) in length, connecting Highway 17 near Obatanga Provincial Park with Dubreuilville. A private logging road continues east from that point.

Initially constructed in 1962 as the Dubreuilville Industrial Road, Highway 519 was assumed by the province in 1985-1986. The route is paved throughout its length and encounters no communities of any size along its length, aside from Dubreuilville. A previous iteration of Highway 519 existed in Haliburton County between 1956 and 1984, travelling from north of Kinmount to north of Haliburton Village.