The 1958 Idaho gubernatorial election was held on November 4. Incumbent Republican Robert E. Smylie defeated Democratic nominee Alfred M. Derr with 50.96% of the vote.
Since changing to four-year term for governor beginning with the 1946 election, this was the first time the incumbent was permitted to run for re-election, due to a change in the state's constitution, approved by voters in November 1956. The last incumbent to be re-elected was C. Ben Ross, who won a third two-year term in 1934.
Primary elections Primary elections were held on August 12, 1958.
Democratic primary Candidates Alfred M. Derr, Clark Fork state senator H. Max Hanson, Fairfield state senator John Glasby, Mountain Home, former state party chairman Omar Maine, Parma farmer
Results
Republican primary Candidate Robert E. Smylie, incumbent governor (unopposed)
Results
General election Candidates Robert E. Smylie, Republican Alfred M. Derr, Democratic
Results
References