64th Ohio Infantry

64th Regiment, Ohio Volunteer Infantry
Flag of the 64th Regiment, Ohio Volunteer Infantry
Active	November 9, 1861 – December 3, 1865
Country	United States of America
Allegiance	Union
Type	Regiment
Role	Infantry
Engagements	Battle of Shiloh Siege of Corinth Battle of Perryville Battle of Stones River Tullahoma Campaign Battle of Chickamauga Siege of Chattanooga Battle of Missionary Ridge Atlanta Campaign Battle of Rocky Face Ridge Battle of Resaca Battle of Kennesaw Mountain Siege of Atlanta Battle of Jonesboro Battle of Spring Hill Second Battle of Franklin Battle of Nashville

The 64th Ohio Volunteer Infantry (or 64th OVI) was an infantry regiment in the Union Army during the American Civil War.

The 64th Ohio Infantry was organized at Camp Buckingham in Mansfield, Ohio and mustered in for three years service on November 9, 1861 under the command of Colonel James William Forsyth. The regiment was recruited in Ashland, Clark, Crawford, Marion, Richland, Stark, Van Wert, and Wayne counties.

The regiment was attached to 20th Brigade, Army of the Ohio, to January 1862. 20th Brigade, 6th Division, Army of the Ohio, to September 1862. 20th Brigade, 6th Division, II Corps, Army of the Ohio, to November 1862. 3rd Brigade, 1st Division, Left Wing, XIV Corps, Army of the Cumberland, to January 1863. 3rd Brigade, 1st Division, XXI Corps, Army of the Cumberland, to October 1863. 3rd Brigade, 2nd Division, IV Corps, Army of the Cumberland, to June 1865. 2nd Brigade, 2nd Division, IV Corps, to August 1865. Department of Texas to November 1865.

John A. Gillis, a corporal from the 64th Ohio, gave his reasons for fighting for the Union in the war, stating in his diary that "We are now fighting to destroy the cause of these dangerous diseases, which is slavery and the slave power."