This roster includes the known officers and enlisted men of the 40th 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 40th Ohio Infantry (Three Years’ Service), these resources may provide additional historical detail, including regimental histories and Civil War reference works.
Field & Staff
Some details are incomplete in surviving primary sources.
- Colonel Jonathan Cranor – service notes.
- Colonel Jacob E. Taylor – service notes.
- Lieutenant Colonel Peter W. Taylor – service notes.
- Lieutenant Colonel William Jones – service notes.
- Lieutenant Colonel James Watson – service notes.
- Major Thomas Acton – service notes.
- Major John L. Reeves – service notes.
Company A
Some details are incomplete in surviving primary sources.
Company B
Some details are incomplete in surviving primary sources.
Company C
Some details are incomplete in surviving primary sources.
Company D
Some details are incomplete in surviving primary sources.
Company E
Some details are incomplete in surviving primary sources.
Company F
Some details are incomplete in surviving primary sources.
Company G
Some details are incomplete in surviving primary sources.
Company H
Some details are incomplete in surviving primary sources.
Company I
Some details are incomplete in surviving primary sources.
Company K
Some details are incomplete in surviving primary sources.
Consolidations or Transfers
In late 1864, non-veteran members of the 40th Ohio Infantry (Three Years’ Service) were mustered out, and the remaining veterans were consolidated with the 51st Ohio Infantry.
Sources & Notes
- Official Records of the War of the Rebellion, Series I, relevant volumes and parts.
- State Adjutant General Report for Ohio (years as applicable; volume and page ranges as available).
- Dyer’s Compendium.
- Fox, “Regimental Losses in the American Civil War.”
- The Union Army, Federal Publishing Company, 1908, Vol. 2.