| | Name | Rank | ASN | Unit | Campaign | | Oates, Clinton L. | Pvt | 38545522 | 119/Unk Co | |
| Oates, Russell L. | Sgt | | 117 | |
| Obal, Edward S. | | | 120/Unk Co | |
| Obbards, Theo W. | | | 531 AAA/Btry C | |
| Obenour, Charles E. | T/5 | | Recon | |
| Oberlin, Kenneth | TSgt | 6263868 | 119/K | |
| Oberting, Paul J. | Pfc | | 743 Tank/SVC | |
| Oberts, Lawrence H. | Pvt | | 117/B | |
| Obney, Jack R. | | | 531 AAA/Btry B | |
| Obremski, Benjamin | Pfc | 33340407 | 119 | |
| Obremski, Edward F. | Pfc | 31077628 | 117 | |
| Obrenski, Charles J. | SSgt | 32564621 | 120/I | F,N,R,A,CE |
| Occhipinti, George | | | 119/G | |
| Ochiltree, Howard W. | Pvt | | Recon | |
| Ochlan, Charles | Pfc | 32974869 | 120/Unk Co | |
| Ochsenschlager, James | | | 119/Unk Co | |
| Ochtel, James R. | 1stSgt | O | 119/Unk Co | |
| Ochwat, Gene F. | T/5 | | 197 FA | |
| Ockovic, (unknown) | Pfc | 33369580 | 119/E | |
| Odegaard, Gerald J. | Pfc | | 117 | |
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