Pea Ridge Union order of battle
The following Union Army units and commanders fought in the Battle of Pea Ridge. The Pea Ridge Confederate order of battle is shown separately.
Abbreviations used
Military rank
- BG = Brigadier General
- Col = Colonel
- Ltc = Lieutenant Colonel
- Maj = Major
- Cpt = Captain
- Lt = 1st Lieutenant
Other
- k = killed
- w = wounded
- c = captured
[Army of the Southwest]
Army Headquarters
BG Samuel R. Curtis| Division | Brigade | Unit | Commander | Killed | Wounded | Missing | Casualties |
| Headquarters | Not Brigaded | 24th Missouri Volunteer Infantry Companies A, B, F, H, I | Maj Eli W. Weston | 3 | 16 | 7 | 26 |
| Headquarters | Not Brigaded | 3rd Regiment Iowa Volunteer Cavalry Companies A, B, C, D, M | Col Cyrus Bussey | 24 | 17 | 9 | 50 |
| Headquarters | Not Brigaded | Bowen’s Missouri Cavalry Battalion, 4 companies 4 12-pounder mountain howitzers | Maj William D. Bowen | 1 | 3 | 2 | 6 |
First and Second Divisions
BG Franz Sigel| Division | Brigade | Unit | Commander | Killed | Wounded | Missing | Casualties |
First Division Col Peter J. Osterhaus | First Brigade Col Peter J. Osterhaus | 25th Illinois Volunteer Infantry Regiment | Col William N. Coler | 3 | 18 | 3 | 24 |
First Division Col Peter J. Osterhaus | First Brigade Col Peter J. Osterhaus | 44th Illinois Volunteer Infantry Regiment | Col Charles Knobelsdorff | 1 | 2 | 0 | 3 |
First Division Col Peter J. Osterhaus | First Brigade Col Peter J. Osterhaus | 17th Missouri Volunteer Infantry, Company A detached | Maj August H. Poten | 0 | 2 | 8 | 10 |
First Division Col Peter J. Osterhaus | Second Brigade Col Nicholas Greusel | 36th Illinois Volunteer Infantry Regiment Company F detached | Col Nicholas Greusel | 4 | 37 | 34 | 75 |
First Division Col Peter J. Osterhaus | Second Brigade Col Nicholas Greusel | 12th Missouri Volunteer Infantry, Company E detached | Maj Hugo Wangelin | 3 | 29 | 2 | 34 |
First Division Col Peter J. Osterhaus | Artillery | 4th Independent Battery, Ohio Light Artillery 4 rifled 6-pounder guns & 2 12-pounder howitzers | Cpt Louis Hoffman | 1 | 4 | 0 | 5 |
First Division Col Peter J. Osterhaus | Artillery | Welfley’s Independent Battery, Missouri Light Artillery 3 12-pounder howitzers & 2 12-pounder Napoleons | Cpt Martin Welfley | 0 | 5 | 0 | 5 |
Second Division BG Alexander Asboth | First Brigade Col Frederick Schaefer | 2nd Missouri Volunteer Infantry | Ltc Bernard Laiboldt | 8 | 34 | 12 | 54 |
Second Division BG Alexander Asboth | First Brigade Col Frederick Schaefer | 15th Missouri Volunteer Infantry, Company B detached | Col Francis J. Joliat | 0 | 0 | 11 | 11 |
Second Division BG Alexander Asboth | Not Brigaded | 3rd Missouri Volunteer Infantry, Companies B, C, E | Maj Joseph Conrad | 0 | 0 | 0 | 0 |
Second Division BG Alexander Asboth | Not Brigaded | 4th Missouri Volunteer Cavalry Companies A, C, D, E, F, I | Maj Emeric Meszaros | 5 | 8 | 3 | 16 |
Second Division BG Alexander Asboth | Not Brigaded | 5th Missouri Volunteer Cavalry | Col Joseph Nemett | 3 | 11 | 3 | 17 |
Second Division BG Alexander Asboth | Artillery | 1st Missouri Flying Artillery Battery 4 rifled 6-pounder guns & 2 12-pounder howitzers | Cpt Gustavus M. Elbert | 3 | 8 | 8 | 19 |
Second Division BG Alexander Asboth | Artillery | 2nd Independent Battery, Ohio Light Artillery 4 6-pounder guns & 2 12-pounder howitzers | Lt William B. Chapman | 1 | 2 | 0 | 3 |
Third and Fourth Divisions
| Division | Brigade | Unit | Commander | Killed | Wounded | Missing | Casualties |
| Third Division Col Jefferson C. Davis | First Brigade Col Thomas Pattison | 8th Indiana Infantry Regiment | Col William P. Benton | 5 | 27 | 0 | 32 |
| Third Division Col Jefferson C. Davis | First Brigade Col Thomas Pattison | 18th Regiment Indiana Infantry | Ltc Henry D. Washburn | 3 | 23 | 0 | 26 |
| Third Division Col Jefferson C. Davis | First Brigade Col Thomas Pattison | 22nd Regiment Indiana Infantry Company B detached | Ltc John A. Hendricks Maj David W. Daily, Jr. | 9 | 33 | 0 | 42 |
| Third Division Col Jefferson C. Davis | First Brigade Col Thomas Pattison | 1st Battery Indiana Light Artillery 4 rifled 6-pounder guns & 2 6-pounder guns | Cpt Martin Klauss | 0 | 5 | 6 | 11 |
| Third Division Col Jefferson C. Davis | Second Brigade Col Julius White | 37th Illinois Volunteer Infantry Regiment | Ltc Myron Barnes | 20 | 121 | 3 | 144 |
| Third Division Col Jefferson C. Davis | Second Brigade Col Julius White | 59th Illinois Volunteer Infantry Regiment | Ltc Calvin H. Frederick | 9 | 57 | 0 | 66 |
| Third Division Col Jefferson C. Davis | Second Brigade Col Julius White | Battery A, 2nd Illinois Light Artillery 2 rifled 6-pounder guns & 2 6-pounder guns & 2 12-pounder howitzers | Cpt Peter Davidson | 0 | 17 | 0 | 17 |
| Third Division Col Jefferson C. Davis | Not Brigaded | 1st Missouri Volunteer Cavalry Regiment Companies B, F, G, H, I, K, L, M | Col Calvin A. Ellis | 2 | 2 | 2 | 6 |
| Fourth Division Col Eugene A. Carr | First Brigade Col Grenville M. Dodge | 4th Iowa Volunteer Infantry Regiment | Ltc John Galligan | 18 | 139 | 3 | 160 |
| Fourth Division Col Eugene A. Carr | First Brigade Col Grenville M. Dodge | 35th Illinois Volunteer Infantry Regiment | Col Gustavus A. Smith Ltc William P. Chandler | 14 | 47 | 52 | 113 |
| Fourth Division Col Eugene A. Carr | First Brigade Col Grenville M. Dodge | 3rd Regiment Illinois Volunteer Cavalry | Maj John McConnell | 9 | 36 | 13 | 58 |
| Fourth Division Col Eugene A. Carr | First Brigade Col Grenville M. Dodge | 1st Independent Battery, Iowa Light Artillery 4 6-pounder guns & 2 12-pounder howitzers | Cpt Junius A. Jones Lt Virgil A. David | 3 | 14 | 0 | 17 |
| Fourth Division Col Eugene A. Carr | Second Brigade Col William Vandever | 9th Iowa Volunteer Infantry Regiment | Ltc Francis J. Herron Maj William H. Coyl | 38 | 176 | 4 | 218 |
| Fourth Division Col Eugene A. Carr | Second Brigade Col William Vandever | 25th Missouri Volunteer Infantry | Col John S. Phelps | 12 | 71 | 11 | 94 |
| Fourth Division Col Eugene A. Carr | Second Brigade Col William Vandever | 3rd Independent Battery, Iowa Light Artillery 4 6-pounder guns & 2 12-pounder howitzers | Cpt Mortimer M. Hayden | 2 | 17 | 3 | 22 |