John Young McDonald (8 August 1837 – 7 September 1917) was a Scottish-born Australian politician.
He migrated to Melbourne around 1855 and tried his luck on the Ballarat goldfields without success.
He worked as a plumber based in Ballarat, and after thirty years retired to become a sharebroker.
In 1898 he was elected to the Victorian Legislative Council to represent Wellington Province.
McDonald resigned in 1917 and died at Ballarat later that year; he had never married.