Port Republic Union order of battle

The following United States Army units and commanders fought in the Battle of Port Republic of the American Civil War. The Confederate order of battle is listed separately.

Military rank

 * MG = Major General
 * BG = Brigadier General
 * Col = Colonel
 * Ltc = Lieutenant Colonel
 * Maj = Major
 * Cpt = Captain

Department of the Rappahannock
MG Irvin McDowell (not present)

Forces at Port Republic
BG Erastus B. Tyler