| Election Name: | 1866 West Virginia gubernatorial election |
| Type: | presidential |
| Previous Election: | 1864 West Virginia gubernatorial election |
| Previous Year: | 1864 |
| Next Election: | 1868 West Virginia gubernatorial election |
| Next Year: | 1868 |
| Ongoing: | no |
| Election Date: | October 25, 1866 |
| Nominee1: | Arthur I. Boreman |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 23,802 |
| Percentage1: | 58.11% |
| Nominee2: | Benjamin H. Smith |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 17,158 |
| Percentage2: | 41.89% |
| Governor | |
| Before Election: | Arthur I. Boreman |
| Before Party: | Republican Party (United States) |
| After Election: | Arthur I. Boreman |
| After Party: | Republican Party (United States) |
The 1866 West Virginia gubernatorial election took place on October 25, 1866, to elect the governor of West Virginia.