| O'Banion | Lowell A. | Sgt. | 511th | |
| O'Brian | John H. | PFC | 854th Chemical Company | |
| O'Brien | Charles J. | 2nd Lt. | 508th | |
| O'Brien | Kenneth E. | S/Sgt. | 509th | |
| O'Brien | Robert L. | S/Sgt. | 509th | |
| O'Brien | William P. | 1st Lt. | 511th | |
| O'Brien | William W. | Sgt. | 447th Sub-Depot | |
| O'Bryant | John D. | T/Sgt. | 508th | |
| O'Connell | Daniel L. | 2nd Lt. | 508th | |
| O'Connell | Edward J. | Cpl | 1629th Ordnance S&M Co. | |
| O'Connell | Richard F. | S/Sgt. | 1206th QM Company | |
| O'Connell [photo] | William J. | S/Sgt. | 511th | |
| O'Connor | James K. | 2nd Lt. | 511th | |
| O'Connor | John G. | Cpl | 509th | |
| O'Dell | Carl S. | S/Sgt. | 510th | |
| O'Dell | Clarence W. | Cpl | 201st Finance Section | |
| O'Donel | Wendell F. | PFC | 510th | |
| O'Donnell | Kenneth B. | Sgt. | 510th | |
| O'Donoghue | James J. | 2nd Lt. | 509th | KIA Dec. 1, 1943 |
| O'Fearna | John H. | PFC | 509th | |
| O'Hanlon | George E. | Sgt. | 510th | |
| O'Hearn | Robert W. | S/Sgt. | 510th | |
| O'Keefe | Lawrence J. | Sgt. | 510th | |
| O'Lear | Stephen C. | Sgt. | 509th | |
| O'Leary | Edward J. | PFC | 447th Sub-Depot | |
| O'Leary | Joseph H. | PFC | 11th Station Complement | |
| O'Leary [photo] | William P. | T/Sgt. | 509th | |
| O'Loughin | Robert V. | S/Sgt. | 351st HQ | |
| O'Malley | Martin J. | Sgt. | 509th | Int'd Jun. 21, 1944 |
| O'Neill | John J. | Sgt. | 510th | |
| O'Neill [photo] | John R. | S/Sgt. | 509th | |
| O'Neill [photo] | Paul C. | Sgt. | 511th | KIA Dec. 1, 1943 |
| O'Shea | James R. | S/Sgt. | 510th | |
| O'Shea | Michael F. Jr | 2nd Lt. | 511th | POW Oct. 7, 1944 |
| O'Toole | Terrance S. | Cpl | 509th | |
| Oakes | Thomas H. | 1st Lt. | 510th | |
| Ober | Daniel D. | Sgt. | 1061st MP Company | |
| Oberhau | Frederick A. | Cpl | 509th | |
| Ocamb | James C. | Sgt. | 510th | KIA Jul 19, 1944 |
| Occulto | Joseph R. | T/Sgt. | 510th | |
| Ochmanek | Edwin J. | S/Sgt. | 511th | |
| Odell | Clarence W. Jr | Cpl | 201st Finance Section | |
| Odgers | Richard H. | PFC | 508th | |
| Odom | James E. | S/Sgt. | 1629th Ordnance S&M Co. | |
| Oen | Daniel A. | 1st Lt. | 510th | |
| Offutt | John W. | S/Sgt. | 508th | POW Jun. 14, 1944 |
| Ogden | Ernest C. | Sgt. | 509th | Int'd Feb. 25, 1945 |
| Ohde | William M. Jr | Sgt. | 511th | POW Sep. 12, 1944 |
| Ohr | Edward | M/Sgt. | 511th | |
| Ohrel | Charles G. | 1st Lt. | 511th | |
| Oldham | Orville | Capt. | 508th | |
| Olivari [photo] | William E. | S/Sgt. | 509th | |
| Oliver | John W. | Sgt. | 509th | |
| Oliver | Kenneth A. | S?Sgt. | 509th | |
| Oliver | Oswell O. | S/Sgt. | 1206th QM Company | |
| Oliver | William A. | S/Sgt. | 509th | Int'd Jun. 21, 1944 |
| Oliveri | L. M. | Cpl | 1061st MP Company | |
| Olivo | August A. | Sgt. | 508th | |
| Olsen | Harry A. | 1st Lt. | 11th Station Complement | |
| Olsen | Harry C. R. | 1st Lt. | 510th | |
| Olsen | Robert W. | PFC | 510th | |
| Olsen | Rodney A. | Sgt. | 11th Station Complement | |
| Olson | Alvin S. | T/Sgt. | 509th | |
| Olson | Edwin L. | Capt. | 508th | |
| Olson | Evan D. | Sgt. | 508th | POW Nov. 21, 1944 |
| Olson | Henry O. | Sgt. | 511th | |
| Olson [photo] | Wendell D. | 1st Lt. | 510th | |
| Olvera | Joseph L. | T/Sgt. | 509th | |
| Omer | Albert C. | T/Sgt. | 509th | |
| Omohundro [photo] | Jack H. | 1st Lt. | 509th | |
| Onken | Edwin S. | 2nd Lt. | 508th | POW May 28, 1944 |
| Opphile | Creyle G. | Cpl | 447th Sub-Depot | |
| Orban | Charles W. | M/Sgt. | 508th | |
| Orband | Daniel G. | Cpl | 510th | |
| Orff | Leslie B. | PFC | 447th Sub-Depot | |
| Orndorff | William H. | 2nd Lt. | 508th | |
| Ornett | Ernest G. | 2nd Lt. | 511th | POW Sep. 12, 1944 |
| Orosz | Peter A. | Cpl | 351st HQ | |
| Orzechowski | Joseph H. | T/Sgt. | 447th Sub-Depot | |
| Osborn | George C. | S/Sgt. | 508th | KIA Nov. 5, 1943 |
| Osborne | George G. | S/Sgt. | 508th | POW May 14, 1943 |
| Osborne | Oliver W. | Sgt. | 508th | |
| Oslund | John W. | 2nd Lt. | 511th | |
| Osteen | D. | S/Sgt. | 351st HQ | |
| Ostheimer | Robert V. | 2nd Lt. | 510th | POW May 14, 1943 |
| Otis | Wilbur V. | T/Sgt. | 511th | |
| Otte | Maximilian R. | S/Sgt. | 510th | |
| Ottensen | D. L. | Sgt. | 508th | |
| Otto | John J. | Cpl | 511th | |
| Ouder | Melvin L. | 1st Lt. | 511th | |
| Ovehile | G. G. | Cpl | 1206th QM Company | |
| Overholt | Orval O. | 1st Lt. | 508th | |
| Overmyer | John T. | F/O | 509th | |
| Overton | Edward T. | Sgt. | 510th | |
| Overton | Richard L. | S/Sgt. | 509th | |
| Owen | Gleen C. | Sgt. | 508th | KIA Jul. 28, 1944 |
| Owens | Lonnie | S/Sgt. | 511th | MIA Jun. 28, 1943 |
| Owens | Vernon C. | T/Sgt. | 510th | |
| Owens | William R. | M/Sgt. | 509th | |
| Owers | Albert | Capt. | 508th | |
| Owre | Jesse C. | 1st Lt. | 510th | |
| Oxley | Fred E. | Sgt. | 508th | |
| P |