12th Regiment Pennsylvania Volunteers
Company A
| Name | Rank | Date of Muster Into Service | Remarks | 
| Samuel A. M’Kee | Captain | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| James Chalfant | 1st Lieutenant | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Samuel Dobbins | 2d Lieutenant | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Andrew Wayt | 1st Sergeant | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| David Spence | 2d Sergeant | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Geo. Holmes | 3d Sergeant | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Martin Campe | 4th Sergeant | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| George Hughes | 1st Corporal | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Alexander Butler | 2d Corporal | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| John Black | 3d Corporal | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Charles L. Donohue | 4th Corporal | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| David A. Jones | Musician | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Victor Keller, Jr. | Musician | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Atkinson, Peter | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Bussne, Philip | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Benner, Henry Z. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Byrer, Henry J. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Baird, John | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Bennett, William | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Campbell, Alfred | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Clark, James Y. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Craige, David K. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Carl, Conrad | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Deibel, George | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Dennison, William J. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Foster, Eaward | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Fulton, Hugl | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Green, Charles | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Gillespie, Elias L. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Glenn, David | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Hagan, John | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Harkins, Patrick | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Hensell, William, Jr. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Hershman, John C. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Heckman, Francis N. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Hackwelder, David | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Harper, George F. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Irwin, Thomas | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Jones, Thomas | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Kinkerly, Jacob | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Knarr, Philip | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Kerr, Jackson | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Little, Joseph C. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Lerris, John W. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Leofcross, Charles W. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Laughlin, John | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Laughlin, Washington | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Lynch, James | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Miller, Thomas | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Montgomery, Stewart | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Manhinney, William | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Might, John | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Myers, Joseph | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Moreland, John | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Marriner, Charles J. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Morrow, James M. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Murphy, John H. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Moore, Thomas J. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| M’Collin, Hugh | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| M’Kee, George | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| M’Millan, William | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Osborne, Aaron J. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Osborne, Albert G. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Poland, John W. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Potter, Henry | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Robinson, John B | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Sims, William | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Stewart,William | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Smith, George A. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Spurrier, Alexander | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Seaman, Edwin M. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Saul, George C. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Staubs, William W. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Tafel, Henry C. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Thomas, Aaron R. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Tatem, Thomas M. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
| Wing, Joseph E. | Private | April 25, 1861 | Mustered out with the Regiment, August 5, 1861 | 
Source: Bates, Samuel P. History of the Pennsylvania Volunteers, 1861-65 , Harrisburg, 1868-1871.