| | Name | Rank | ASN | Unit | Campaign | | Ostrander, William M. | Pfc | | 119/G | |
| Ostrom, Eugene J. | T/5 | | 197 FA | |
| Ostrowske, John A. | T/5 | | 118 FA/C | |
| Ostrowski, Steve S. | Pvt | 36665015 | 119/E | |
| Ostwald, Charles C. | Pfc | | 117/A | NF,R,A |
| Oswald, William B. | Pvt | 13102381 | DHQ CIC Det | 5 |
| Oswalt, Ralph V. | Cpl | 35098592 | 120/M | |
| Ott, Arthur J. | | | 117 | |
| Otte, Frederick N. | Pfc | | 823 TD/C | |
| Ottinger, (unknown) | Pvt | 6476236 | 119/E | |
| Ottino, Charles R. | T/4 | | 197 FA | |
| Otto, Arthur L. | Pvt | 35586806 | 120/A | |
| Otto, Earl A. | Pfc | | 120/G | |
| Otto, Henry L. | | | 119/Unk Co | |
| Ouder, Pet | | | Unk | |
| Ouellette, Wildor H. | Pvt | 31119843 | 117/Hq | |
| Oumedian, George | Pfc | | 117/B | N |
| Outlaw, Wilton | Pfc | 34933645 | 119/M | |
| Overall, Harold L. | Sgt | | 117/SV | |
| Overbeck, Albert A. | Pfc | | 117/C | N,NF |
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