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Commanded by Major General George Meade
| Headquarters | ||
| First Corps | Major General John Newton | |
| 1st Division | Brigadier General Lysander Cutler |
|
| 2nd Division | Brigadier General John C. Robinson | |
| 3rd Division | Brigadier General John Kenly |
|
| Second Corps | Major General Gouverneur Warren | |
| 1st Division | Brigadier General John C. Caldwell | |
| 2nd Division | Brigadier General A. S. Webb |
|
| 3rd Division | Brigadier General Alexander Hays | |
| Third Corps | Major General William H. French | |
| 1st Division | Major General David Birney | |
| 2nd Division | Brigadier General Henry Prince | |
| 3rd Division | Brigadier General W. L. Elliott | |
| Fifth Corps | Major General George Sykes (to 10/7) Brigadier General Samuel W. Crawford (to 10/15) Major General George Sykes |
|
| 1st Division | Brigadier General Charles Griffin (to 10/24) Colonel Jacob B. Sweitzer |
|
| 2nd Division | Brigadier General Romeyn B. Ayres | |
| 3rd Division | Colonel William McCandless | |
| Sixth Corps | Major General John Sedgwick |
|
| 1st Division | Brigadier General Horatio G. Wright | |
| 2nd Division | Brigadier General Albion P. Howe | |
| 3rd Division | Brigadier General Henry D. Terry | |
| Artillery Reserve | Brigadier General Robert O. Tyler | |
| 1st Regular Brigade | Captain Alanson M. Randol | |
| 1st Volunteer Brigade | Colonel Freeman McGilvery | |
| 2nd Volunteer Brigade | Captain Elijah D. Taft | |
| 3rd Volunteer Brigade | Captain James F. Huntington | |
| 4th Volunteer Brigade | Captain Robert H. Fitzhugh | dissolved |
| Cavalry Corps | Brigadier General Alfred Pleasonton |
|
| 1st Division | Brigadier General John Buford |
|
| 2nd Division | Brigadier General David McM. Gregg | |
| 3rd Division | Brigadier General Judson Kilpatrick | |