| Regimental number | 2074 |
| Place of birth | Krambach New South Wales |
| Religion | Roman Catholic |
| Occupation | Labourer |
| Address | Krambach, New South Wales |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Father, John Joseph Gallagher, Krambach, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 36th Battalion, 3rd Reinforcement |
| AWM Embarkation Roll number | 23/53/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A68 Anchises on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 33rd Battalion |
| Fate | Returned to Australia |
| Miscellaneous information from cemetery records | Plaque in New South Wales Garden of Remembrance |
| Family/military connections | Brothers: 2072 Lance Corporal Stephen GALLAGHER, 33rd Bn, effective abroad, (still overseas); 777 Pte Bernard Patrick GALLAGHER, 33rd Bn, returned to Australia, 11 May 1919. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
| Date of death |