Ontario Highway 15

Ontario Highway 15

King's Highway 15, commonly referred to as Highway 15, is a provincially maintained highway in the Canadian province of Ontario. It currently travels north from an interchange with Highway 401 in Kingston to Highway 7 in Carleton Place, but once continued east from there into Ottawa until that section became part of Highway 7. The length of Highway 15 is 113.4 kilometres (70.5 mi).

Highway 15 was one of the original highways created by the province in 1920 to establish a highway network and qualify for funding under the Canada Highways Act. The southern terminus, originally in Seeley's Bay, was moved to Highway 2 in Kingston the following year. The routing of the highway has changed several times over the years, but it continues to serve the same region of Eastern Ontario as it has since 1920.