< to May • June 1863 • to July >
Commanded by:
Major General Joseph Hooker (to June 28)
Major General George Meade
Headquarters | 
||
| Headquarters Staff | ||
| Chief of Staff | Major General Daniel Butterfield | |
| Chief of Artillery | Brigadier General Henry J. Hunt | |
| Chief Engineer | Brigadier General Gouverneur K. Warren | |
| Assistant Adjutant General | Brigadier General Seth Williams | |
| Inspector General | Colonel Delos B. Sacket | |
| Chief Quartermaster | Lieutenant Colonel Rufus Ingalls | |
| Medical Director | Surgeon Jonathan Letterman | |
| Bureau of Information | Colonel George H. Sharpe | |
| Chief Signals Officer | Captain Samuel T. Cushing | |
| Guards and Orderlies | ||
| Oneida (New York) Cavalry Company | Captain Daniel P. Mann | |
| 6th Pennsylvania Cavalry Regiment, Companies E and I  | 
Captain Emlen N. Carpenter (Co. E) Captain James Starr (Co. I)  | 
|
| Provost Guard | Major William H. Wood | |
| 93rd New York Infantry, Cos. AFH&K | Colonel John S. Crocker | |
| 94th New York Infantry Regiment | Colonel Adrian Rowe Root | |
| 2nd Pennsylvania Cavalry Regiment | Colonel Richard Butler Price | from 22 Corps, Stahel’s Div. 2 Brig. | 
| 8th United States Infantry, Cos. ABDF&G | Captain Edwin W. H. Read | |
| Provost Guard-Patrick’s Brigade | Colonel William F. Rogers | |
| 35th New York Infantry Regiment | Colonel John G. Todd | mustered out 6/5 | 
| 80th New York Infantry Regiment | Colonel Theodore B. Gates | to 1st Corps, 3 Div., 1 Brig. | 
| Engineer Brigade | Brigadier General Daniel Woodbury | |
| 15th New York Engineer Regiment | Colonel John M. Murphy | |
| 50th New York Engineer Regiment | Lieutenant Colonel William H. Pettes | |
| Regular Engineer Battalion | Captain James C. Duane | |
First Corps | 
Major General John F. Reynolds (to wing commander 6/30) Major General Abner Doubleday  | 
|
| 1st Division | Brigadier General John S. Wadsworth | |
| 2nd Division | Brigadier General John C. Robinson | |
| 3rd Division | Major General Abner Doubleday (^ 6/30) Brigadier General Thomas A. Rowley  | 
|
Second Corps | 
Major General Winfield S. Hancock | 
|
| 1st Division | Brigadier General John C. Caldwell | |
| 2nd Division | Brigadier General John Gibbon | |
| 3rd Division | Major General William H. French (to 6/28) Brigadier General Alexander Hays  | 
|
Third Corps | 
Major General David B. Birney (to 6/3) Major General Daniel Sickles  | 
|
| 1st Division | Brigadier General J. H. H. Ward (to 6/3) Major General David Birney  | 
|
| 2nd Division | Major General Andrew A. Humphreys | |
| 3rd Division | Brigadier General Charles K. Graham | discontinued 6/20 | 
Fifth Corps | 
Major General George Meade (^ 6/28) Major General George Sykes  | 
|
| 1st Division | Brigadier General Charles Griffin (to 5/5) Brigadier General James Barnes  | 
|
| 2nd Division | Major General George Sykes (^ 6/28) Brigadier General Romeyn B. Ayres  | 
|
| 3rd Division | Brigadier General Samuel W. Crawford | from Washington | 
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 | 
|
| 1st Division | Brigadier General Francis C. Barlow | 
|
| 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 | 
Brigadier General Robert O. Tyler | |
| 1st Regular Brigade | Captain Dunbar R. Ransom | |
| 1st United States Artillery, Battery H | ||
| 3rd United States Artillery, Batteries F&K | ||
| 4th United States Artillery, Battery C | ||
| 4th United States Artillery, Battery G | to 11th Corps Artillery | |
| 5th United States Artillery, Battery C | ||
| 2nd Regular Brigade | Captain John C. Tidball | to Cavalry Corps, 2nd Brig. Horse Artillery | 
| 1st United States Artillery, Batteries E&G | ||
| 1st United States Artillery, Battery K | ||
| 2nd United States Artillery, Battery A | ||
| 3rd United States Artillery, Battery C | ||
| 1st Volunteer Brigade | Lieutenant Colonel Freeman McGilvery | |
| 6th Maine Battery | to 4th Volunteer Brig. (below) | |
| 1st New York Artillery, Battery B | ||
| 1st New York Artillery, Battery G | to 4th Volunteer Brig. (below) | |
| 5th Massachusetts Battery/ 10th New York Independent Battery  | 
Captain Charles A. Philips | temporarily combined due to casualties from Chancellorsville | 
| 15th New York Independent Battery | ||
| 1st Ohio Artillery, Battery H | to 3 Volunteer Brig. (below) | |
| Pennsylvania Independent Battery C | Captain James Thompson | combined with Pennsylvania Independent Battery F 6/3 | 
| 2nd Volunteer Brigade | Captain Elijah D. Taft | |
| 1st Connecticut Heavy Artillery, Company B | Lieutenant Albert F. Brooker | |
| 1st Connecticut Heavy Artillery, Company B | Captain Franklin A. Pratt | |
| 5th New York Independent Battery | Captain Elijah D. Taft | |
| 29th New York Independent Battery | Captain Otto Diederichs | |
| 30th New York Independent Battery | Captain Adolph Voegelee | |
| 31st New York Independent Battery | Lieutenant Bernhard Wever | |
| 32nd New York Independent Battery | Captain Charles Kusserow | |
| 3rd Volunteer Brigade | Captain James F. Huntington | |
| 1st New Hampshire Battery | ||
| 1st Ohio Artillery, Battery H | from 1 Volunteer Brig. (above) | |
| 1st Pennsylvania Artillery, Battery F | ||
| 1st Pennsylvania Artillery, Battery G | ||
| 1st Rhode Island Artillery, Battery C | to 6th Corps Artillery Brig | |
| 1st West Virginia Artillery, Battery C | ||
| 4th Volunteer Brigade | Captain Robert H. Fitzhugh | |
| 6th Maine Battery | from 1st Volunteer Bde. (above) | |
| 1st Maryland Artillery, Battery A | ||
| 1st New Jersey Artillery, Battery A | from 6th Corps Artillery Bde. | |
| 1st New York Artillery, Battery G | from 1st Volunteer Bde. (above) | |
| 1st New York Artillery, Battery K | ||
| 11th New York Independent Battery | ||
| 1st Rhode Island Artillery, Battery G | ||
| Unattached | ||
| 32nd Massachusetts Infantry, Co. C | ||
| 1st Maryland Artillery, Battery B | Captain Alonzo Snow | to 22nd Corps, Camp Berry | 
| 12th Ohio Independent Battery | Captain Aaron C. Johnson | to 22nd Corps, Camp Berry | 
Cavalry Corps | 
Brigadier General Alfred Pleasonton (to Major General 6/22) | 
|
| 1st Division | Brigadier General John Buford | 
|
| 2nd Division | Colonel Alfred N. Duffie | |
| 3rd Division | Brigadier General David McM. Gregg | |
