| Election Name: | 1978 Wyoming gubernatorial election |
| Country: | Wyoming |
| Type: | presidential |
| Election Date: | November 7, 1978 |
| Ongoing: | no |
| Previous Election: | 1974 Wyoming gubernatorial election |
| Previous Year: | 1974 |
| Next Election: | 1982 Wyoming gubernatorial election |
| Next Year: | 1982 |
| Nominee1: | Edgar Herschler |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 69,972 |
| Percentage1: | 50.86% |
| Party2: | Republican Party (United States) |
| Nominee2: | John Ostlund |
| Popular Vote2: | 67,595 |
| Percentage2: | 49.14% |
| Map Size: | 250px |
| Governor | |
| Before Election: | Edgar Herschler |
| Before Party: | Democratic Party (United States) |
| After Election: | Edgar Herschler |
| After Party: | Democratic Party (United States) |
The 1978 Wyoming gubernatorial election took place on November 7, 1978. Incumbent Democratic Governor Edgar Herschler ran for re-election to a second term. After winning a contested Democratic primary, he advanced to the general election, where he faced former State Senator John Ostlund, the Republican nominee. Despite the strong Republican performance nationwide, Herschler's personal popularity allowed him to narrowly win re-election to Ostlund, making him the first Democratic Governor to win re-election since Lester C. Hunt in 1946.