| Regimental number | 8/3025 |
| Date of birth | |
| Place of birth | Invercargill |
| Religion | Roman Catholic |
| Occupation | Labourer |
| Address | Red Mount, The Key, Auckland |
| Marital status | Single |
| Age at embarkation | 20 |
| Height | 5' 7" |
| Weight | 140 lbs |
| Next of kin | Father, J O'Halloran, Post Office, Lorne, Southland |
| Previous military service | Served for 3 years in School Cadets; not serving in any miltary unit at time of NZEF enlistment. |
| Enlistment date | |
| Place of enlistment | Trentham |
| Rank on embarkation | Private |
| Enlistment status | Volunteer |
| Unit name | New Zealand Expeditionary Force, 7th Reinforcements, Otago Infantry Battalion |
| Embarkation details | Unit embarked from Wellington on |
| The 7th Reinforcements left New Zealand on 10 October 1915 aboard three ships ('Aparima', 'Navua' and 'Warrimoo'). It is not possible from the Nominal Roll to determine on which ship an individual embarked. | |
| Final rank | Private |
| Final unit | 1st Battalion, Otago Infantry Regiment |
| Fate | Killed in Action |
| Place of burial | Poelcapelle British Cemetery (Plot IV, Row F, Grave 27), near Ieper, Belgium |
| Miscellaneous information from cemetery records | Parents: Mr and Mrs John O'Halloran, Lorne, Invercargill |
| Other details |
War service: Egypt, Western Front War service: 2 years 128 days (of which 735 days were abroad) Medals: 1914-15 Star, British War Medal, Victory Medal |
| Miscellaneous details | Nominal Roll Vol. 1: Otago Infantry Batln/Seventh. No form B103 on file: scant details available. |
| Sources | Archives New Zealand (Wellington), Agency AABK, Series 1880, File 21381998 |