and whose last names begin with ‘O’.
| Name | Rating | Duty Station | Date |
| O’Berry, J. L. | FN | Group Rockland, ME | 9/9/1949 |
| O’Donnell, W. R. | Cox | USS Serpens | 1/29/1945 |
| O’Grady, J. W. | S2 | USS Leopold | 3/9/1944 |
| O’Leary, W. F. | S1 | USCGC Escanaba | 6/13/1943 |
| O’Neil, M. E. | BM3 | Sta Cleveland Harbor, OH | 9/21/1993 |
| O’Quinn, W. E. Jr | EN3 | USCGC White Alder | 12/7/1968 |
| Oakland, D. H. | S1 | USS Serpens | 1/29/1945 |
| Obendorf, T. | BM3 | USCGC Waesche | 12/18/2013 |
| Oddershede, C. P. | Surfman | Sta Velasco, TX | 8/16/1915 |
| Oglesby, B. B. | TM3 | USS Menges | 5/3/1944 |
| Ohar, J. | S2 | USS Leopold | 3/9/1944 |
| Ohlsen, F. W. | S1 | USS Muskeget | 9/9/1942 |
| Oliver E. A. | GM1 | LT-134 | 6/25/1945 |
| Olsen, W. S. | MM1 | USS Little | 9/5/1942 |
| Olson, W. | AM2 | AIRSTA Annette, AK | 7/3/1964 |
| Orcutt, J. R. | MoMM1 | USCGC Clover | 5/18/1944 |
| Orkney, E. | MoMM1 | USCGC Perry | 7/16/1926 |
| Orosz, A. K. | Surfman | STA Buffalo, NY | 7/17/1932 |
| Orton, G. E. | CMM | USS Serpens | 1/29/1945 |
| Osburn, E. E. | S1 | USCGC McLane | 5/6/1947 |
| Osier, L. W. | CMM | USS Muskeget | 9/9/1942 |
| Ostoja, T. A. | SR | TRACEN Alameda, CA | 6/24/1969 |
| Outlaw, L. | ENC | USCGC Basswood | 3/23/1972 |
| Oversen, M. M. | WT | USS Seneca | 9/16/1918 |
| Owens, T. E. | S1 | USS Callaway | 1/8/1945 |