| Regimental number | 1710 |
| Religion | Roman Catholic |
| Occupation | Farmer |
| Address | Lismore, New South Wales |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, Mr David O'Neill, Borrie via Lismore, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 49th Battalion, 2nd Reinforcement |
| AWM Embarkation Roll number | 23/66/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board SS Hawkes Bay on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 49th Battalion |
| Recommendations (Medals and Awards) |
Congratulatory Card Recommendation date: |
| Fate | Returned to Australia |
| Miscellaneous details (Nominal Roll) | *Spelt Michael Denis O'Neill on NR |
| Date of death | |
| Place of burial | Lismore Cemetery |