| Unit Name: | 1st Missouri State Cavalry Battalion (Militia) |
| Dates: | March 26 – November 11, 1862 |
| Country: |  United States |
| Allegiance: | Union |
| Branch: | Cavalry |
| Type: | Militia |
| Size: | Battalion |
| Battles: | American Civil War |
| Disbanded: | November 11, 1862 |
The battalion was recruited at St. Charles, Missouri on March 26, 1862. Once officially recognized by the United States Military, it was attached to the District of Central Missouri, Department of Missouri. On September 4, the battalion sent scouts to Callaway County and Prairie Station.[1] The battalion saw duty at St. Charles, Missouri, while operating against guerrillas in that area until the first few days of November 1862. During its service, the battalion incurred one enlisted soldier fatality (killed), and twelve men died of disease.[1]