| Election Name: | 1958 Idaho gubernatorial election |
| Country: | Idaho |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1954 Idaho gubernatorial election |
| Previous Year: | 1954 |
| Next Election: | 1962 Idaho gubernatorial election |
| Next Year: | 1962 |
| Election Date: | November 4, 1958 |
| Image1: | File:Robert E. Smylie.jpg |
| Nominee1: | Robert E. Smylie |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 121,810 |
| Percentage1: | 50.96% |
| Nominee2: | Alfred M. Derr |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 117,236 |
| Percentage2: | 49.04% |
| Map Size: | 230px |
| Governor | |
| Before Election: | Robert E. Smylie |
| Before Party: | Republican Party (United States) |
| After Election: | Robert E. Smylie |
| After Party: | Republican Party (United States) |
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.[1] [2] The last incumbent to be re-elected was C. Ben Ross, who won a third two-year term in 1934.
Primary elections were held on August 12, 1958.[3] [4] [5] [6] [7]