[2] He was appointed the first city clerk for Toronto on 3 April 1834, but resigned on 26 February 1835, after Reformers were defeated in that year's municipal elections.

[2] That year he purchased 210 acres (85 ha) of land north of Toronto to build a house that resembled his childhood home and called it Castlefield.

[1] When Reformers marched toward Toronto on 5 December William Botsford Jarvis asked Price to bring the Lieutenant-Governor's offer for a truce.

Price refused, stating he did not want others to think he was joining the rebels and suggested Robert Baldwin or John Rolph be sent instead.

[2] It was rumoured that Mackenzie, upon the rebellion's defeat on 7 December, hid in a large crib in Price's kitchen while the cook asked officers not to wake the babies.

[2] In 1841, he was elected to the Legislative Assembly of the Province of Canada for the 1st riding of York as a Reformer, defeating John William Gamble.

[2] He criticized Governor-General Charles Theophilus Metcalfe for ignoring the executive council's advice in making patronage appointments.

[1][7] In March he joined the Reform Association to oppose Metcalfe's appointment of a Speaker of the House in the Canadian Parliament without consulting the executive council.

[11] In the 1851 election for the 4th Parliament of the Province of Canada, Price sought to be renominated as the Reform candidate for York South, but David Gibson was selected instead.

[2] Price was introduced to the Reform movement by Jesse Ketchum, who married his wife's sister Mary Anne.

[2] William Lyon Mackenzie James Lesslie John RolphWilliam John O'GradyHenry John Boulton David WillsonSamuel HughesJohn McIntoshMarshall Spring Bidwell Robert BaldwinWilliam Warren Baldwin Francis Hincks Charles Duncombe Samuel Lount Peter Matthews Jesse Lloyd Anthony Van Egmond Thomas D. Morrison David GibsonJames Hervey PriceJoseph Shepard