The following Union Army units and commanders fought in the Battle of Belmont of the American Civil War. The Confederate order of battle is listed separately.
| width=25% | Brigade | Regiments and Other |
|---|---|---|
| McClernand's Brigade BG John A. McClernand | ||
| Dougherty's Brigade Col Henry Dougherty |
| |
| Cavalry |
| |
| Artillery |
| |
| Gunboats |
| |
| Steamers |
| |
| width=25% | Brigade | Regiments and Other |
|---|---|---|
| from Bird's Point toward Bloomfield |
| |
| Oglesby's Brigade Col Richard James Oglesby |
| |
| Cavalry |
| |
| Artillery |
| |
| Plummer's Brigade Col Joseph B. Plummer [from Cape Girardeau to Bloomfield] |
| |
| from Cape Girardeau to Charleston | ||
| Cook's Brigade Col John Cook [from Fort Holt, Kentucky to Columbus] |
| |
| width=25% | Brigade | Regiments and Others |
|---|---|---|
| 1st Brigade BG Eleazer A. Paine |
| |
| 2nd Brigade |
| |
Cooperating unit not subject to Grant's command, from Ironton to St. Francis River