| Election Name: | 1966 Wyoming gubernatorial election |
| Country: | Wyoming |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1962 Wyoming gubernatorial election |
| Previous Year: | 1962 |
| Next Election: | 1970 Wyoming gubernatorial election |
| Next Year: | 1970 |
| Nominee1: | Stanley Hathaway |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 65,624 |
| Percentage1: | 54.29% |
| Party2: | Democratic Party (United States) |
| Nominee2: | Ernest Wilkerson |
| Popular Vote2: | 55,249 |
| Percentage2: | 45.71% |
| Map Size: | 250px |
| Governor | |
| Before Election: | Clifford Hansen |
| Before Party: | Republican Party (United States) |
| After Election: | Stanley Hathaway |
| After Party: | Republican Party (United States) |
The 1966 Wyoming gubernatorial election took place on November 8, 1966. Incumbent Republican Governor Clifford Hansen declined to seek a second term, instead opting to run for the U.S. Senate. Stanley Hathaway, the former Goshen County Prosecuting Attorney, won the Republican primary, and faced attorney Ernest Wilkerson, the Democratic nominee, in the general election. Despite the unfavorable national environment for Democratic candidates, Wilkerson was able to improve on Democrats' performance from the 1962 election, but not enough to defeat Hathaway, who won the election by a decisive margin.