| Regimental number | 3604 |
| Place of birth | Coburg, Victoria |
| Religion | Roman Catholic |
| Occupation | Driver |
| Address | 16 Ackland Street, St Kilda, Victoria |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Father, Arthur E O'Leary, 16 Acland Street, St Kilda, Melbourne, Victoria |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 23rd Battalion, 8th Reinforcement |
| AWM Embarkation Roll number | 23/40/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A19 Afric on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 24th Battalion |
| Fate | Died of wounds |
| Age at death from cemetery records | 25 |
| Place of burial | Berks Cemetery Extension (Plot II, Row A, Grave No. 52), (Rosenberg Plateau Plots) Ploegsteert, Belgium |
| Panel number, Roll of Honour, Australian War Memorial | 102 |
| Miscellaneous information from cemetery records | Parents: Arthur and Elizabeth O'LEARY, 16 Ackland Street, St. Kilda, Victoria |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |