Gideon Tabor Stewart (August 7, 1824 – 1909) was an American lawyer as well as a newspaper owner and editor. He was very active in promoting the temperance movement. He was elected three timess as grand worthy chief templar of the Good Templars of Ohio. Throughout the 1850s he attempted to organize a permanent prohibition party.
In 1869, Stewart was one of the delegates to the convention that established the national Prohibition Party. Afterward, he served as the party candidate three times for governor of Ohio, seven times for judge on that state's Supreme Court, once for circuit court judge, once for Congress, and once (1876) for vice-president of the United States.
Stewart wrote widely on prohibition and related matters.
Originally he was a Whig, and joined the Republicans during the Civil War, before joining the Prohibitionist at the end of the war.