| Regimental number | 4325 |
| Place of birth | Goulburn, New South Wales |
| Religion | Roman Catholic |
| Occupation | Driver |
| Address | Goulburn, New South Wales |
| Marital status | Single |
| Age at embarkation | 33 |
| Next of kin | Mother, Mrs A O'Neill, Clinton Street, Goulburn, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 20th Battalion, 10th Reinforcement |
| AWM Embarkation Roll number | 23/37/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A67 Orsova on |
| Rank from Nominal Roll | Lance Sergeant |
| Unit from Nominal Roll | 20th Battalion |
| Fate | Killed in Action |
| Age at death from cemetery records | 35 |
| Place of burial | Peronne Communal Cemetery Extension (Plot III, Row A, Grave No. I), France |
| Panel number, Roll of Honour, Australian War Memorial | 92 |
| Miscellaneous information from cemetery records | Parents: Patrick and Ann O'NEILL |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |