| Election Name: | 1864 Missouri gubernatorial election |
| Country: | Missouri |
| Flag Image: | Flag of the Missouri State Guard.svg |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1860 Missouri gubernatorial election |
| Previous Year: | 1860 |
| Next Election: | 1868 Missouri gubernatorial election |
| Next Year: | 1868 |
| Election Date: | November 8, 1864 |
| Nominee1: | Thomas Clement Fletcher |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 73,600 |
| Percentage1: | 70.32% |
| Nominee2: | Thomas Lawson Price |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 31,064 |
| Percentage2: | 29.68% |
| Map Size: | 270px |
| Governor | |
| Before Election: | Willard Preble Hall |
| Before Party: | Republican Party (United States) |
| After Election: | Thomas Clement Fletcher |
| After Party: | Republican Party (United States) |
The 1864 Missouri gubernatorial election was held on November 8, 1864, and resulted in a victory for the Union Republican nominee, Thomas Clement Fletcher, over Democratic nominee former Congressman (and former Lt. Gov.) Thomas Lawson Price.