Ontario Highway 73
| Route information | |||||||
|---|---|---|---|---|---|---|---|
| Maintained by the Ministry of Transportation of Ontario | |||||||
| Length | 38.9 km (24.2 mi) | ||||||
| Existed | August 25, 1937–January 1, 1998 | ||||||
| Major junctions | |||||||
| South end | Colin Street, Port Bruce | ||||||
| Highway 3 – Aylmer Highway 401 | |||||||
| North end | County Road 29 (Hamilton Road) – Dorchester, Ingersoll | ||||||
| Location | |||||||
| Country | Canada | ||||||
| Province | Ontario | ||||||
| Highway system | |||||||
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King's Highway 73, commonly referred to as Highway 73, was a provincially maintained highway in the Canadian province of Ontario. The route began in Port Bruce and progressed north through Aylmer, encountering Highway 401 immediately before terminating east of Dorchester. The route was established in mid-1937, remaining unchanged for nearly six decades before being transferred to Elgin County and Middlesex County in 1997 and 1998. Today the route is known as Elgin County Road 73 and Middlesex County Road 73.