| Election Name: | 1864 Maryland gubernatorial election |
| Country: | Maryland |
| Flag Year: | 1863 |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1861 Maryland gubernatorial election |
| Previous Year: | 1861 |
| Next Election: | 1867 Maryland gubernatorial election |
| Next Year: | 1867 |
| Election Date: | November 8, 1864 |
| Nominee1: | Thomas Swann |
| Party1: | Unionist Party (United States) |
| Popular Vote1: | 40,579 |
| Percentage1: | 55.86% |
| Nominee2: | Ezekiel F. Chambers |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 32,068 |
| Percentage2: | 44.14% |
| Map Size: | 300px |
| Governor | |
| Before Election: | Augustus Bradford |
| Before Party: | Unionist Party (United States) |
| After Election: | Thomas Swann |
| After Party: | Unionist Party (United States) |
The 1864 Maryland gubernatorial election took place on November 8, 1864. Incumbent Union Party Governor Augustus Bradford did not run for re-election. Union Party candidate Thomas Swann defeated Democratic candidate Ezekiel F. Chambers.
The Union Party was a faction of the Maryland Democratic Party which supported the Lincoln administration.[1] The party supported the re-election of Abraham Lincoln under the banner of the National Union Party.[2]
Swann took his oath of office on January 11, 1865, but by a provision of the 1864 State Constitution, he did not actually become Governor until January 10, 1866.