| Regimental number | 7367 |
| Religion | Roman Catholic |
| Occupation | Station hand |
| Address | Stanmore, New South Wales |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Mother, Mrs Catherine O'Neill, 109 Macauley Road, Stanmore, New South Wales |
| Enlistment date | 23 January 1917 |
| Date of enlistment from Nominal Roll | 17 January 1917 |
| Rank on enlistment | Private |
| Unit name | 13th Battalion, 24th Reinforcement |
| AWM Embarkation Roll number | 23/30/5 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A18 Wiltshire on 7 February 1917 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | Australian Army Ordnance Corps |
| Fate | Returned to Australia 6 July 1919 |
| Family/military connections | Brothers: 3369 Pte John Patrick O'NEIL, MM, 18th Bn, killed in action, 16 October 1917; 1263 Pte Charles Bernard O'NEILL, 1st Light Horse Regiment, returned to Australia, 20 December 1918; 9957 Gunner William Edward O'NEILL, 1st Field Artillery Brigade, returned to Australia, 20 April 1919. |
