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Commanded by Major General Joseph Hooker
| Headquarters | ||
| First Corps | Major General John F. Reynolds | |
| 1st Division | Brigadier General John S. Wadsworth | |
| 2nd Division | Brigadier General John C. Robinson | |
| 3rd Division | Major General Abner Doubleday | |
| Second Corps | Major General Darius N. Couch (to 5/22) Major General Winfield S. Hancock |
|
| 1st Division | Major General Winfield S. Hancock (to 5/22) Brigadier General John C. Caldwell |
|
| 2nd Division | Brigadier General John Gibbon | |
| 3rd Division | Major General William H. French | |
| Third Corps | Major General Daniel Sickles (to 5/29) Major General David B. Birney |
|
| 1st Division | Brigadier General David Birney (to 5/29) Brigadier General J. H. H. Ward |
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| 2nd Division | Brigadier General Hiram Berry (k 5/3) Brigadier General Joseph B. Carr (to 5/23) Major General Andrew A. Humphreys |
|
| 3rd Division | Brigadier General Amiel W. Whipple (mw 5/3) Brigadier General Charles K. Graham |
|
| Fifth Corps | Major General George Meade | |
| 1st Division | Brigadier General Charles Griffin (to 5/5) Brigadier General James Barnes |
|
| 2nd Division | Major General George Sykes | |
| 3rd Division | Brigadier General Andrew A. Humphreys | dissolved 5/24 |
| Sixth Corps | Major General John Sedgwick |
|
| 1st Division | Brigadier General W. T. H. Brooks (to 5/23) Brigadier General Horatio G. Wright |
|
| 2nd Division | Brigadier General Albion P. Howe | |
| 3rd Division | Brigadier General John Newton | |
| Eleventh Corps | Major General Oliver O. Howard |
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| 1st Division | Brigadier General Charles Devens (to 5/2) Brigadier General Nathaniel C. McLean (to 5/24) Brigadier General Francis C. Barlow |
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| 2nd Division | Brigadier General Adolph Von Steinwehr | |
| 3rd Division | Brigadier General Carl Schurz | |
| Twelfth Corps |
Major General Henry W. Slocum |
|
| 1st Division | Brigadier General Alpheus Williams | |
| 2nd Division | Brigadier General John W. Geary | |
| Artillery Reserve | Captain William M. Graham (to 5/2) Brigadier General Robert O. Tyler |
reorganized 5/2 |
| 1st Regular Brigade | Captain Dunbar R. Ransom | |
| 2nd Regular Brigade | Captain John C. Tidball | |
| 1st Volunteer Brigade | Lieutenant Colonel Freeman McGilvery | |
| 2nd Volunteer Brigade | Captain Elijah D. Taft | |
| 3rd Volunteer Brigade | Captain James F. Huntington | |
| 4th Volunteer Brigade | Captain Robert H. Fitzhugh | |
| Cavalry Corps | Major General George Stoneman (to 5/22) Brigadier General Alfred Pleasonton |
|
| 1st Division | Brigadier General Alfred Pleasonton (to 5/22) Brigadier General John Buford (to 5/27) Colonel Benjamin F. Davis |
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| 2nd Division | Brigadier General W. W. Averill (to 5/16) Colonel A. N. Duffie |
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| 3rd Division | Brigadier General David McM. Gregg | |