John Blythe (October 4, 1849 – ) was an Ontario farmer and political figure. He represented Grey South in the Legislative Assembly of Ontario from 1883 to 1890 as a Conservative member.
He was born in Guelph, Canada West in 1849, the son of Alexander Wright Blythe, a Scottish immigrant. In 1871, he married Jane Peteo. Blythe served as reeve for Normanby Township.