First Battle of Winchester order of battle: Union

The following United States Army units and commanders fought in the First Battle of Winchester (May 25, 1862) of the American Civil War. The Confederate order of battle is listed separately.

Abbreviations used

Division	Brigade	Regiment or Other
First Division BG Alpheus S. Williams	First Brigade Col Dudley Donnelly	5th Connecticut: Ltc George D. Chapman 28th New York: Ltc Edwin Franklin Brown 46th Pennsylvania: Col Joseph F. Knipe
	Third Brigade Col George Henry Gordon	27th Indiana: Col Silas Colgrove 2nd Massachusetts: Ltc George L. Andrews 29th Pennsylvania: Col John K. Murphy (c), Cpt Samuel M. Zulich 3rd Wisconsin: Col Thomas H. Ruger
	Cavalry Attachment	1st Michigan Cavalry (5 companies): Col Thornton F. Brodhead, Maj Angelo Paldi
	Artillery Attachment Cpt Robert B. Hampton	Battery M, 1st New York Light Artillery: Lt James H. Peabody Battery F, Pennsylvania Light Artillery: Lt J. Presley Fleming Battery F, 4th U.S. Light Artillery: Lt Franklin B. Crosby
Attached independent units
	Cavalry Brigade BG John P. Hatch	1st Maine Cavalry (2nd Battalion): Ltc Calvin S. Douty 1st Maryland Cavalry (5 companies): Ltc Charles Wetschky 5th New York Cavalry: Col Othneil De Forest 1st Vermont Cavalry: Col Charles H. Tompkins
	Various Units BG John W. Geary	10th Maine: Col George L. Beal 8th New York Cavalry (5 companies, dismounted): Ltc Charles R. Babbitt Pennsylvania Zouaves d'Afrique: Cpt Charles H. T. Collis Battery E, Pennsylvania Light Artillery: Lt Charles A. Atwell