| Election Name: | 1858 Oregon gubernatorial election |
| Country: | Oregon |
| Type: | presidential |
| Ongoing: | no |
| Next Election: | 1862 Oregon gubernatorial election |
| Next Year: | 1862 |
| Election Date: | June 7, 1858 |
| Image1: | File:Gov John Whiteaker.jpg |
| Nominee1: | John Whiteaker |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 5,134 |
| Percentage1: | 54.93% |
| Nominee2: | E. M. Barnum |
| Alliance2: | Republican Party (United States) |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 4,213 |
| Percentage2: | 45.07% |
| Governor | |
| Before Election: | George Law Curry |
| Before Party: | Democratic Party (United States) |
| After Election: | John Whiteaker |
| After Party: | Democratic Party (United States) |
The 1858 Oregon gubernatorial election took place on June 7, 1858, to elect the first governor in anticipation of Oregon statehood. With the state Democratic Party split into factions driven by personal rivalry and state government influence, the election matched insurgent E. M. Barnum against establishment candidate John Whiteaker, who won. The Republican Party first nominated John Denny, but he later withdrew in favor of the insurgent Democrat, whom the party hoped to win over to the Republicans.[1]