All but one was the original route of Highway 7 (or what became Highway 7) through the town or city that it served, and was subsequently given the 7B designation when a newer bypass route was constructed to reduce traffic pressure on the urban street network.

With urban sections already under the jurisdiction of the City of Kitchener, the province transferred the route to the Regional Municipality of Waterloo in 1975.

[3][4] The entire route was located in Victoria County (present-day Kawartha Lakes).

[citation needed] The following table lists the major junctions along Highway 7B.

The province transferred the route to the Township of Madoc in 1969 and is currently known as Hastings County Road 23.

Highway 7B was a 3.21-kilometre (1.99 mi) bypass along the northern edge of Carleton Place that existed between 1961 and 1998.

[7][8] Construction of the Carleton Place Bypass began in the spring of 1958, with the aim of rerouting Highway 15 traffic out of the downtown area.

[citation needed] The following table lists the major junctions along Highway 7B.