Ontario Highway 43
|Maintained by the Ministry of Transportation|
|Length||154.2 km (95.8 mi)|
|Existed||1938–January 1, 1998|
|West end||Highway 7 – Perth|
| Highway 15 – Smiths Falls|
Highway 416 – Kemptville
Highway 31 – Winchester
|East end||Highway 34 – Alexandria|
|Major cities||Perth, Smiths Falls|
|Towns||Merrickville, Kemptville, Winchester, Chesterville, Finch, Alexandria|
King's Highway 43, also known as Highway 43, was a provincially maintained highway in the Canadian province of Ontario. On January 1, 1998, the entire route was transferred to the county that each section resided in, resulting in the current designations of Lanark County Road 43, Leeds and Grenville Road 43 and Stormont, Dundas and Glengarry Road 43. Highway 43 ran somewhat parallel to and between Highway 401 and Highway 417 from Highway 7 in Perth to Highway 34 in Alexandria, passing through several small towns along the way. At 154.2 km (95.8 mi), it is the longest highway in Ontario to be decommissioned entirely during the mass transfer of Highways in 1997 and 1998.
Highway 43 began in the west at Highway 7 on the edge of Perth. It travelled eastward north of the Tay Canal and Lower Rideau Lake into Smiths Falls. After a brief concurrency with Highway 15 southwards, the route continued east nearby the Rideau Canal through Merrickville and Kemptville, meeting what was then a soon-to-open interchange with Highway 416 east of the latter. The highway continued east, bypassing the communities of Winchester and Chesterville, jogging southwards several times. After bisecting Finch and skirting south of Avonmore, the route encountered Ontario Highway 138 before entering Monkland. After passing north of Loch Garry, Highway 43 entered Alexandria, ending at an intersection with Highway 34 (Main Street) in the centre of the town.
Highway 43 was established in 1934, travelling between Highway 31 near Winchester to Highway 34 in Alexandria. In 1961, the Department of Highways extended Highway 43 westward 39 mi (63 km) to Highway 7 in Perth. East of Smiths Falls, the new highway was created using existing county roads. To the west, it assumed the previous route of Highway 15 to Perth. The route remained unchanged for the next 36 years until it was decommissioned entirely on January 1, 1998 as part of a series of budget cuts initiated by premier Mike Harris under his Common Sense Revolution platform. It was the longest King's Highway to be removed entirely from the system during these cuts, known as downloading (although Highway 2 lost significantly more of its length). Jurisdiction over the roadway was transferred to the counties and city that Highway 43 crossed: Lanark County, Smiths Falls, the United Counties of Leeds and Grenville and the United Counties of Stormont, Dundas and Glengarry.
|Port Elmsley||12.9||8.0||County Road 18 (Port Elmsley)|
|Smiths Falls||21.6||13.4||Highway 15 north|
|22.0||13.7||Highway 15 south|
|Montague||30.4||18.9||County Road 23 (Rosedale Road)|
|Leeds and Grenville||Merrickville-Wolford||40.4||25.1||County Road 15 (St. Lawrence Street)|
|42.4||26.3||County Road 23||Western junction with County Road 23|
|North Grenville||48.2||30.0||County Road 23||Eastern junction with County Road 23|
|53.6||33.3||County Road 25|
|Kemptville||59.7||37.1||County Road 44 (Prescott Highway)|
|North Grenville||61.4||38.2||County Road 19 (Rideau River Road)|
|62.3||38.7||Highway 416 (Veterans Memorial Highway) – Ottawa, Brockville||Exit 34|
|62.9||39.1||County Road 24|
|65.3||40.6||County Road 22 (South Gower Drive)|
|Stormont, Dundas and Glengarry||North Dundas||72.0||44.7||County Road 1 north (Reids Mills Road)|
|74.3||46.2||County Road 1 south (Mountain Road)|
|81.6||50.7||County Road 3 (Inkerman Road)|
|85.4||53.1||County Road 31 north – Ottawa||Formerly Highway 31; beginning of concurrency with County Road 31|
|89.0||55.3||County Road 38 (St. Lawrence Street)|
|89.5||55.6||County Road 31||End of concurrency with County Road 31|
|96.6||60.0||County Road 9 (Loucks Road)|
|Chesterville||98.4||61.1||County Road 37 (Queen Street)|
|100.4||62.4||County Road 7|
|North Dundas – North Stormont boundary||104.6||65.0||County Road 11 (Boundary Road)|
|Finch||112.5||69.9||County Road 12 north (Crysler Road) – Crysler|
|112.6||70.0||County Road 12 south (Victoria Street)|
|North Stormont||119.9||74.5||County Road 14 (Finch – Roxborough Boundary Road)|
|Avonmore||122.9||76.4||County Road 15|
|Monkland||130.2||80.9||Highway 138 – Cornwall|
|North Glengarry||137.6||85.5||County Road 20 north (Highland Road) – Maxville|
|139.4||86.6||County Road 20 south (Apple Hill Road) – Apple Hill|
|144.2||89.6||County Road 30 (Greenfield Road)|
|151.7||94.3||County Road 45 (Kenyon Dam Road)|
|Alexandria||154.2||95.8||County Road 34||Former Highway 34|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
- Ministry of Transportation of Ontario (April 1, 1989). Provincial Highways Distance Table. Government of Ontario. pp. 62–63. ISSN 0825-5350.
- Highway Transfers List - "Who Does What" (Report). Ministry of Transportation of Ontario. June 20, 2001. pp. 8, 9, 14, 17.
- Official Road Map (Map). Cartography by Cartography Section. Ministry of Transportation. 1990–91. § D16–F19.
- Ministry of Transportation of Ontario (June 26, 1998). "New Section of Veterans Memorial Highway Opened Today" (Press release). Government of Ontario. Archived from the original on March 5, 2000. Retrieved October 26, 2011.
- Ontario Department of Highways (March 31, 1961). Annual Report for the Fiscal Year (Report). p. 117.
Highway 43 was extended from Winchester to Smiths Falls, a distance of 39 miles, by assumption of the county road