John Skinner Stewart (23 April 1902 – 5 February 1973) was a New Zealand politician of the Labour Party.
Stewart contested the Kaipara electorate in the 1943 election, but lost to Clifton Webb. He represented the Arch Hill electorate from 1951 to 1954. The electorate was then absorbed into neighbouring electorates, and he was defeated in 1954, standing for Eden.