The following Union Army units and commanders fought in the Battle of Chaffin's Farm of the American Civil War. The Confederate order of battle is shown separately.
| Division | Brigade | Regiments and Others |
|---|---|---|
First Division | 1st Brigade Col Francis B. Pond (w) |
|
| 2nd Brigade Col Joseph C. Abbott | ||
| 3rd Brigade | ||
Second Division | 1st Brigade Col Rufus Daggett (w) |
|
| 2nd Brigade |
| |
| 3rd Brigade Col Louis Bell | ||
Third Division | 1st Brigade |
|
Artillery | Artillery Brigade |
|
MG Edward O. C. Ord (w) September 29
BG Charles A. Heckman
Brevet MG Godfrey Weitzel [2]
| Division | Brigade | Regiments and Others |
|---|---|---|
First Division | 1st Brigade Col Aaron Fletcher Stevens (w) |
|
| 2nd Brigade BG Hiram Burnham (k) |
| |
| 3rd Brigade Col Samuel H. Roberts (w) |
| |
Second Division | 1st Brigade Col James Jourdan |
|
| 2nd Brigade Col Edward H. Ripley | ||
| 3rd Brigade |
| |
Third Division [6] | 1st Brigade Col John Henry Holman | |
| 2nd Brigade Col Alonzo G. Draper | ||
| 3rd Brigade Col Samuel A. Duncan (w) | ||
| Unattached |
| |
Artillery | Artillery Brigade Maj George B. Cook |
|
Bermuda Hundred | Provisional Brigade Col Joseph H. Potter |
|
| Division | Brigade | Regiments and Others |
|---|---|---|
Cavalry Division | 1st Brigade Col Robert M. West | |
| 2nd Brigade Col Samuel P. Spear | ||
| Artillery | ||