John Flaws Reid (June 30, 1860 – July 10, 1943) was a Scottish-born farmer and political figure in Saskatchewan, Canada. He represented Mackenzie in the Canadian House of Commons and was first elected in the Conscription Crisis election of 1917 as a Liberal-Unionist supporting the Union Government of Sir Robert Borden. He did not run for re-election in 1921.He was born in Eday, Orkney Islands, the son of Robert Reid and Charlotte Stevenson.