The 1956 Ohio gubernatorial election was held on November 6, 1956. Republican nominee C. William O'Neill defeated Democratic nominee Michael DiSalle with 56.04% of the vote. Primary elections Primary elections were held on May 8, 1956. Democratic primary Candidates Michael DiSalle, former Mayor of Toledo John E. Sweeney, former Ohio Secretary of State Robert W. Reider Frank X. Kryzan, Mayor of Youngstown Oscar L. Fleckner Results Republican primary Candidates C. William O'Neill, Ohio Attorney General John William Brown, incumbent Lieutenant Governor Results General election Candidates C. William O'Neill, Republican Michael DiSalle, Democratic Results References 1956 Ohio Gubernatorial