| Last Name | First Name | M.I. | Rank | Service/Serial # | Branch | War/Conflict | Cemetery/Memorial | Entered From | Unit |
|---|---|---|---|---|---|---|---|---|---|
| O'Neal | James | O. | Second Lieutenant | O1691516 | U.S. Army | World War II | Rhone American Cemetery | Ohio | 4134th Quartermaster Service Company |
| O'Neil | Carl | Technician Fifth Grade | 34852756 | U.S. Army | World War II | Rhone American Cemetery | North Carolina | 583rd Port Company | |
| Ogletree | Abe | Private First Class | 34907579 | U.S. Army | World War II | Rhone American Cemetery | Georgia | 397th Port Battalion | |
| Olson | Charles | J. | First Lieutenant | O-686589 | U.S. Army Air Forces | World War II | Rhone American Cemetery | Oklahoma | 34th Bomber Squadron, 17th Bomber Group, Medium |
| Olson | Clarence | B. | Private First Class | 36330675 | U.S. Army | World War II | Rhone American Cemetery | Illinois | 602nd Field Artillery Battalion |
| Opferman | Norman | R. | First Lieutenant | O-1308536 | U.S. Army | World War II | Rhone American Cemetery | Pennsylvania | 143rd Infantry Regiment, 36th Infantry Division |
| Opheim | Johan | S. | Private First Class | 39603641 | U.S. Army | World War II | Rhone American Cemetery | Montana | 15th Infantry Regiment, 3rd Infantry Division |
| Orient | Andrew | D. | Second Lieutenant | O1013339 | U.S. Army | World War II | Rhone American Cemetery | Pennsylvania | 756th Tank Battalion |
| Osborn | George | G. | Staff Sergeant | 18001587 | U.S. Army | World War II | Rhone American Cemetery | Colorado | 4th Army Air Force Depot Unit |
| Oshin | Harold | Technical Sergeant | 12185272 | U.S. Army Air Forces | World War II | Rhone American Cemetery | New York | 416th Bomber Squadron, 99th Bomber Group, Heavy |