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

Brigade	Regiments and Other
Second Brigade Col Mahlon Dickerson Manson	10th Indiana: Ltc William C. Kise 4th Kentucky Infantry: Col Speed Smith Fry (w) 14th Ohio Infantry, Company C: Cpt J. W. Brown
Third Brigade Col Robert Latimer McCook (w)	2nd Minnesota Infantry (9 companies): Col Horatio Phillips Van Cleve 9th Ohio Infantry: Maj Gustave Kammerling
Twelfth Brigade Col Samuel Perry Carter	12th Kentucky Infantry: Col William A. Hoskins 1st Tennessee Infantry: Col Robert K. Byrd 2nd Tennessee Infantry: Col James P. T. Carter 1st Kentucky Cavalry (4 companies): Col Frank Lane Wolford
Artillery	Battery B, 1st Ohio Artillery: Cpt William E. Standart Battery C, 1st Ohio Artillery: Cpt Dennis Kenny, Jr. 9th Ohio Battery: Cpt Henry Shepard Wetmore

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)

Battle, J. H., et al. Kentucky: A History of the State (Louisville, KY: F. A. Battey, 1885).
The Official Records of the War of the Rebellion, Ser. I, Vol. 7, pp. 79–116; 824.
Ohio Roster Commission. Official Roster of the Soldiers of the State of Ohio in the War on the Rebellion, 1861–1865, Compiled Under the Direction of the Roster Commission 12 vol. (Akron, OH: Werner Co.), 1886–1895.
Reid, Whitelaw. Ohio in the War: Her Statesmen, Her Generals, and Soldiers. (Cincinnati, OH: Moore, Wilstach, & Baldwin), 1868.