John McIntosh (March 4, 1796 – July 3, 1853) was a Scottish-Canadian businessman, ship's captain and political figure in Upper Canada. He was a leading figure of the Upper Canadian reform movement, and was described by his contemporaries as a moderate reformer. He was elected to the province's legislature in 1834, but was unable to be elected to the parliament of the Province of Canada in 1841. He continued supporting reformers, allowing William Lyon Mackenzie to stay in his home upon Mackenzie's return to Canada in 1849.