Mill Springs Union order of battle

The following Union Army units and commanders fought in the Battle of Mill Springs of the American Civil War on January 19, 1862, near present-day Nancy, Kentucky. The Confederate order of battle is listed separately.

Military rank

 * BG = Brigadier General
 * Col = Colonel
 * Ltc = Lieutenant Colonel
 * Maj = Major
 * Cpt = Captain

Other

 * w = wounded

First Division, Army of the Ohio
BG George Henry Thomas

Nearby troops not engaged

 * 10th Kentucky Infantry: Col John Marshall Harlan
 * 2nd Minnesota Infantry, Company A: Cpt Judson Bishop (on picket duty; engaged in pursuit to Beech Grove)
 * 17th Ohio Infantry: Col John M. Connell
 * 35th Ohio Infantry: Col Ferdinand Van Derveer
 * 38th Ohio Infantry, Company A: Cpt Charles Greenwood (camp guard; engaged in pursuit to Beech Grove)
 * 1st Michigan Engineers & Mechanics, Companies D, F, G: Ltc K. A. Hunton (camp guard)