Battle of Mill Springs order of battle: Union
The following Union Army units and commanders fought in the Battle of Mill Springs during the American Civil War on January 19, 1862, near present-day Nancy, Kentucky. The Confederate order of battle is listed separately.
Abbreviations used
Military rank
BG = Brigadier GeneralCol = ColonelLtc = Lieutenant ColonelMaj = MajorCpt = CaptainOther
w = woundedFirst Division, Army of the Ohio
BG George Henry Thomas| Brigade | Regiments and Other |
| Second Brigade Col Mahlon Dickerson Manson |
|
| Third Brigade Col Robert Latimer McCook |
|
| Twelfth Brigade Col Samuel Perry Carter |
|
| Artillery |
Nearby troops not engaged
- 10th Kentucky Infantry: Col John Marshall Harlan
- 2nd Minnesota Infantry, Company A: Cpt Judson Bishop
- 17th Ohio Infantry: Col John M. Connell
- 35th Ohio Infantry: Col Ferdinand Van Derveer
- 38th Ohio Infantry, Company A: Cpt Charles Greenwood
- 1st Michigan Engineers & Mechanics, Companies D, F, G: Ltc K. A. Hunton