1956 United States gubernatorial elections
United States gubernatorial elections were held in 1956, in 30 states, concurrent with the House, Senate elections and the presidential election, on November 6, 1956 (September 10 in Maine). The special election in Oregon was due to the death of incumbent governor Paul L. Patterson on January 31.
Source: Wikipedia — 1956 United States gubernatorial elections (CC BY-SA 4.0)