Army of the Shenandoah (Confederate States Army)
General Joseph E. Johnston

.....1st Brigade (Brig. Gen. Thomas J. Jackson)
..........2d Virginia Infantry
..........4th Virginia Infantry
..........5th Virginia Infantry
..........27th Virginia Infantry
..........33d Virginia Infantry
..........Rockbridge Artillery (Virginia)

.....2d Brigade (Col. Francis S. Bartow)
..........7th Georgia Infantry
..........8th Georgia Infantry
..........Wise Artillery (Virginia)

.....3d Brigade (Brig. Gen. Barnard E. Bee)
..........4th Alabama Infantry
..........2d Mississippi Infantry
..........11th Mississippi Infantry

..........6th North Carolina Infantry
..........Staunton Artillery (Virginia)

.....4th Brigade (Col. Arnold Elzey)
..........1st Maryland Infantry
..........3d Tennessee Infantry
..........10th Virginia Infantry
..........Culpeper Artillery (Virginia)

.....5th Brigade (Brig. Gen. E. Kirby Smith)
..........(Although General Smith arrived at Manassas Junction on 21 July near the end of the battle, the infantry regiments in his brigade did not arrive until 22 July. Stanard’s Battery, however, arrived at the junction late on the evening of 20 July and during the battle was under the command of General Jackson on Henry Hill.)
..........19th Mississippi Infantry
..........8th Alabama Infantry
..........9th Alabama Infantry
..........10th Alabama Infantry
..........11th Alabama Infantry
..........Stanard’s Battery (Virginia)

.....Unattached
..........1st Virginia Cavalry (Col. J. E. B. Stuart)

Army of the Potomac (Confederate States Army)
Brig. Gen. Pierre G. T. Beauregard

.....1st Brigade (Brig. Gen. Milledge L. Bonham)
..........8th Louisiana Infantry
..........11th North Carolina Infantry
..........2d South Carolina Infantry
..........3d South Carolina Infantry
..........7th South Carolina Infantry
..........8th South Carolina Infantry
..........30th Virginia Cavalry (2 companies)
..........Alexandria Light Artillery (Virginia)
..........1st Company, Richmond Howitzers (Virginia)

.....2d Brigade (Brig. Gen. Richard S. Ewell)
..........5th Alabama Infantry

..........6th Alabama Infantry
..........6th Louisiana Infantry
..........Jenifer’s Virginia Cavalry
..........Washington Artillery (4 guns) (Louisiana)

.....3d Brigade (Brig. Gen. David R. Jones)
..........17th Mississippi Infantry
..........18th Mississippi Infantry
..........5th South Carolina Infantry
..........30th Virginia Cavalry (1 company)
..........Washington Artillery (2 guns) (Louisiana)

.....4th Brigade (Brig. Gen. James Longstreet)
..........5th North Carolina Infantry
..........1st Virginia Infantry
..........11th Virginia Infantry
..........17th Virginia Infantry
..........24th Virginia Infantry
..........30th Virginia Cavalry (1 company)
..........Washington Artillery (2 guns) (Louisiana)

.....5th Brigade (Col. Philip St. George Cocke)
..........8th Virginia Infantry
..........18th Virginia Infantry
..........19th Virginia Infantry
..........28th Virginia Infantry
..........49th Virginia Infantry
..........Loudoun Artillery (Virginia)
..........Lynchburg Artillery (2 guns) (Virginia)

.....6th Brigade (Col. Jubal A. Early)
..........7th Louisiana Infantry
..........13th Mississippi Infantry
..........7th Virginia Infantry
..........Washington Artillery (5 guns) (Louisiana)

.....7th Brigade (Col. Nathan G. Evans)
..........1st Special Louisiana Infantry Battalion
..........4th South Carolina Infantry
..........30th Virginia Cavalry (2 companies)
..........Lynchburg Artillery (2 guns) (Virginia)

.....Unattached (Brig. Gen. Theophilus H. Holmes)
..........1st Arkansas Infantry
..........2d Tennessee Infantry
..........Purcell Artillery (Virginia)

.....Unattached (Col. Wade Hampton)
..........Hampton (South Carolina) Legion (6 companies)

Source: United States Army Center of Military History