| Regimental number | 1909 |
| Religion | Roman Catholic |
| Occupation | Timber getter |
| Address | Dundas, Queensland |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, Richard O'Reilly, Dundas via Ferndale, Queensland |
| Enlistment date | 21 September 1915 |
| Rank on enlistment | Private |
| Unit name | 5th Light Horse Regiment, 13th Reinforcement |
| AWM Embarkation Roll number | 10/10/3 |
| Embarkation details | Unit embarked from Brisbane, Queensland, on board HMAT A55 Kyarra on 3 January 1916 |
| Rank from Nominal Roll | Bombardier |
| Unit from Nominal Roll | 14th Field Artillery Brigade |
| Fate | Returned to Australia 16 March 1918 |
| Family/military connections | Brother: 1908 Bombardier John Joseph O'REILLY, 14th Field Artillery Brigade, returned to Australia, 5 January 1919. |
