| Last Name | First Name | M.I. | Rank | Service/Serial # | Branch | War/Conflict | Cemetery/Memorial | Entered From | Unit |
|---|---|---|---|---|---|---|---|---|---|
| O'Neil | Harold | Corporal | 11020760 | U.S. Army Air Forces | World War II | East Coast Memorial | Massachusetts | 59th Bomber Squadron, 9th Bomber Group, Light | |
| O'Neill | John | P. | First Sergeant | 20248770 | U.S. Army | World War II | East Coast Memorial | New York | 107th Gun Crew, Coast Artillery Corps |
| O'Niel | James | L. | Boatswain's Mate Second Class | 3111650 | U.S. Navy | World War II | East Coast Memorial | Michigan | |
| O'Rear | Waltr | L. | Seaman Second Class | 6058706 | U.S. Navy | World War II | East Coast Memorial | Alabama | United States Naval Reserve |
| O'Rourke | Vincent | J. | Seaman First Class | 2054484 | U.S. Navy | World War II | East Coast Memorial | Rhode Island | United States Naval Reserve |
| Obarr | Joe | F. | Seaman Second Class | 5524853 | U.S. Navy | World War II | East Coast Memorial | South Carolina | United States Naval Reserve |
| Oberg | Harold | E. | Private | 32473762 | U.S. Army | World War II | East Coast Memorial | New York | Medical Department |
| Oberg | Paul | C. | Second Lieutenant | 0-864557 | U.S. Army Air Forces | World War II | East Coast Memorial | Texas | Air Corps |
| Oberlin | North | A. | Lieutenant | 0-101840 | U.S. Navy | World War II | East Coast Memorial | Kansas | United States Naval Reserve |
| Obydine | Stephan | E. | Aviation Ordnanceman Third Class | 3058871 | U.S. Navy | World War II | East Coast Memorial | Wisconsin | United States Naval Reserve |