| Election Name: | 1878 Oregon gubernatorial election |
| Country: | Oregon |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1874 Oregon gubernatorial election |
| Previous Year: | 1874 |
| Next Election: | 1882 Oregon gubernatorial election |
| Next Year: | 1882 |
| Election Date: | June 3, 1878 |
| Nominee1: | William Wallace Thayer |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 15,689 |
| Percentage1: | 47.93% |
| Nominee2: | Cornelius C. Beekman |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 15,610 |
| Percentage2: | 47.69% |
| Map Size: | 200px |
| Governor | |
| Before Election: | Stephen F. Chadwick |
| Before Party: | Democratic Party (United States) |
| After Election: | W. W. Thayer |
| After Party: | Democratic Party (United States) |
The 1878 Oregon gubernatorial election took place on June 3, 1878 to elect the governor of the U.S. state of Oregon. The election matched Republican Cornelius C. Beekman against Democrat William Wallace Thayer, with Thayer defeating Beekman by a very small margin.[1]