This roster includes the known officers and enlisted men of the 20th Ohio Infantry (Three Years’ Service), organized by Field & Staff and Companies A through K. Information is drawn from 19th-century state adjutant general reports, the Official Records, and verified regimental histories.
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For an overview of this regiment’s organization, service, engagements, and casualties, see the regiment summary page.
Research This Regiment
If you’re researching ancestors in the 20th Ohio Infantry (Three Years’ Service), these resources may provide additional historical detail, including regimental histories and Civil War reference works.
Field & Staff
- Colonel Charles Whittlesey – Original commanding officer; mustered in 1861.
- Colonel Manning F. Force – Promoted from lieutenant colonel; later brevet major general.
- Lieutenant Colonel James N. McElroy – Served as lieutenant colonel.
- Lieutenant Colonel John C. Fry – Served as lieutenant colonel.
- Lieutenant Colonel Harrison Wilson – Served as lieutenant colonel.
- Major Edward C. Downs – Served as major.
- Major Francis M. Shaklee – Served as major.
- Major Peter Weatherby – Served as major.
Company A
Records for this company are incomplete in the surviving state adjutant general reports.
Company B
Records for this company are incomplete in the surviving state adjutant general reports.
Company C
Records for this company are incomplete in the surviving state adjutant general reports.
Company D
Records for this company are incomplete in the surviving state adjutant general reports.
Company E
Records for this company are incomplete in the surviving state adjutant general reports.
Company F
Records for this company are incomplete in the surviving state adjutant general reports.
Company G
Records for this company are incomplete in the surviving state adjutant general reports.
Company H
Records for this company are incomplete in the surviving state adjutant general reports.
Company I
Records for this company are incomplete in the surviving state adjutant general reports.
Company K
Records for this company are incomplete in the surviving state adjutant general reports.
Sources & Notes
- Official Records of the War of the Rebellion (Series I, Volumes 7, 10, 17, 24, and others as relevant).
- State Adjutant General Report for Ohio (various years and volumes; consult for detailed rosters and service notes).
- Dyer’s Compendium.
- Fox, “Regimental Losses in the American Civil War.”
- The Union Army, Federal Publishing Company, 1908 – Volume 2.