| Unit Name: | 122nd Ohio Infantry Regiment |
| Dates: | September 30, 1862, to June 26, 1865 |
| Country: | United States |
| Allegiance: | Union |
| Branch: | Infantry |
| Battles: | Second Battle of Winchester New York Draft Riots Bristoe Campaign Mine Run Campaign Battle of the Wilderness Battle of Spotsylvania Court House Battle of Totopotomoy Creek Battle of Cold Harbor Battle of Monocacy (detachment) Shenandoah Valley Campaign Third Battle of Winchester Battle of Cedar Creek Siege of Petersburg Appomattox Campaign Battle of Sayler's Creek |
The 122nd Ohio Infantry Regiment, sometimes 122nd Ohio Volunteer Infantry (or 122nd OVI) was an infantry regiment in the Union Army during the American Civil War.
The 122nd Ohio Infantry was organized at Zanesville, Ohio, and mustered in for three years service on September 30, 1862, under the command of Colonel William H. Ball. (Company C mustered in October 3, Company G mustered in October 5, Company F mustered in October 6, and Companies I and K mustered on October 8, 1862.)
The regiment was attached to Railroad Division, Western Virginia, to January 1863. Milroy's Command, Winchester, Va., VIII Corps, Middle Department, to February 1863. 1st Brigade, 2nd Division, VIII Corps, to June 1863. Elliott's Command, VIII Corps, to July 1863. 2nd Brigade, 3rd Division, III Corps, Army of the Potomac, to March 1864. 2nd Brigade, 3rd Division, VI Corps, Army of the Potomac, and Army of the Shenandoah, Middle Military Division, to June 1865.
The 122nd Ohio Infantry mustered out of service at Washington, D.C., on June 26, 1865.
The regiment lost a total of 230 men during service; 7 officers and 86 enlisted men killed or mortally wounded, 137 enlisted men died of disease.