| Regimental number | 882 |
| Religion | Roman Catholic |
| Occupation | Bushman |
| Address | L.H.F. O'Neill, Stonehouse, 21 Westmoreland Street, Glebe, Sydney |
| Marital status | Single |
| Age at embarkation | 29 |
| Next of kin | Mother, Mrs. Elizabeth O'Neill, Stonehouse, 21 Westmoreland Street, Glebe, Sydney |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 6th Light Horse Regiment, 4th Reinforcement |
| AWM Embarkation Roll number | 10/11/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A9 Shropshire on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 6th Light Horse Regiment |
| Fate | Killed in Action |
| Age at death from cemetery records | 27 |
| Place of burial | Shell Green Cemetery (Plot I, Row B, Grave No. 5), Gallipoli, Turkey |
| Panel number, Roll of Honour, Australian War Memorial | 5 |
| Miscellaneous information from cemetery records | Parents: John and Elizabeth O'NEILL, Pink's Buildings, Great North Road, Gladesville, New South Wales |