This is a list of provincial highways in Ontario, Canada. Many of the highways were sold by the Tories, to the counties and municipalities through which the highways pass. Ontario provincial highways are also known as "King's Highways", a name opposed by some people.
Ontario provincial highway 3 - Windsor at the Ambassador Bridge over the Detroit River at the USA-Canada border to Junction Ontario Provincial Highway 77 and Essex County Highway 33 north of Leamington; and Junction Ontario Provincial Highway 4 and Elgin County Highway 4, and Elgin County Highway 3 at Talbotville Royal northwest of St. Thomas to Junction Cement Rd. and Niagara Regional Highway 3 west of Port Colborne; and Junction Ontario Provincial Highway 140 and Niagara Regional Highway 3 at Port Colborne to Junction Rose Hill Rd. and Niagara Regional Highway 3 west of Fort Erie
Ontario provincial highway 4 - St. Thomas to Clinton
Ontario provincial highway 5 - Peters Corners to Clappison's Corners
The King's Highway 3 Port Colborne and probably west of ON-40
The King's Highway 3A (Niagara), Highway 3 junction at Chambers Corners to Highway 58 junction in Welland. Existed from 1927 to 1970
The King's Highway 3A (Windsor), Windsor-Detroit Tunnel to Highway 3 junction at Oliver. Existed from 1929 to 1935
The King's Highway 3B (Maidstone), Highway 3 junction in Maidstone to Highway 2A junction in Maidstone. Existed from 1931to 1938
The King's Highway 3B (Windsor), Windsor-Detroit Tunnel to Highway 401 junction at Windsor. Existed from 1935 to 1998
The King's Highway 3B (Tilsonburg), Highway 3 junction west of Tillsonburg to Highway 3 junction in Tillsonburg. Existed from 1973 to 1977
The King's Highway 3C, Ridgeway/Crystal Beach to Highway 3 junction in Fort Erie. Existed from 1934 to 1970
The King's Highway 5, now Dundas Street, Bloor Street and Danforth Avenue.
The King's Highway 11A, Gardiner Expressway/Lakeshore Boulevard to Macdonald-Cartier Freeway (ON-401) now, York Street then University Avenue, then Avenue Road, and Oriole Parkway
The King's Highway 11B (Cobalt-New Liskeard)
The King's Highway 20 QEW E of Hamilton to QEW/ON-420 interchange, now Confederation Parkway, some prefer Rymal Road, and Lundy's Lane.
The King's Highway 22
The King's Highway 24. 2 km south of Cambridge and northward
The King's Highway 25, (Oakville (Bronte, suburban Toronto) to north of Grand Valley) now Bronte Road (south of Steeles).