Army of the Potomac

Major General Joseph Hooker (until 6/28)
Major General George Meade (after 6/28)

Headquarters

First Corps

Brigadier General John F. Reynolds

Bde. Gen. James S. Wadsworth

Brigadier General J.C. Robinson

Bde. Gen. Abner Doubleday (until 6/30)

Bde. Gen. Thomas A. Rowley (after 6/30)

Second Corps

Maj. Gen. Winfield S. Hancock

Bde. Gen. J. C. Caldwell

Bde. Gen. John Gibbon

Major General W. H. French (until 6/28)

Bde. Gen. Alexander Hays (after 6/28)

Third Corps

Major General David B. Birney (until 6/3)

Major General Daniel Sickles (after 6/3)

Bde. Gen. J. H. H. Ward (until 6/3)

Maj. Gen. David Birney (after 6/3)

Maj. Gen. A. A. Humphreys

Bde. Gen. C. K. Graham

Fifth Army Corps

Major General George Meade (until 6/28)

Major Genral George Sykes (after 6/28)

Bde. Gen. Charles Griffn (until 5/5)

Bde. Gen. James Barnes (after 5/5)

Bde. Gen. George Sykes (until 6/28)

Bde. Gen. Romeyn B. Ayres (after 6/28)

Brigadier General Samuel W. Crawford

reorganized 6/28

Sixth Army Corps

Major General John Sedgwick

Bde. Gen. Horatio G. Wright

Brigadier General A. P. Howe

Bde. Gen. John Newton

Eleventh Army Corps

Major General Oliver O. Howard

Bde. Gen. Francis C. Barlow

Bde. Gen. A. Von Steinwehr

Bde. Gen. Carl Schurz

Twelfth Army Corps

Major General Henry W. Slocum

Bde. Gen. Alpheus Williams

Bde. Gen. John W. Geary

Cavalry Corps

Brigadier General Alfred Pleasonton

Colonel Benjamin F. Davis (until 6/6)

Colonel Thomas C. Devin (6/6 - 6/9)

Brigadier General John Buford (after 6/9)

Colonel A. N. Duffie (until 6/11)

Bde. Gen. David McM. Gregg (after 6/11)

Bde. Gen. David McM. Gregg (until 6/11)

Bde. Gen. Jusdson Kilpatrick (after 6/28)