| Regimental number | 777 |
| Place of birth | Glen Innes, New South Wales |
| Religion | Roman Catholic |
| Occupation | Butcher |
| Address | Inverell PO, Inverell, New South Wales |
| Marital status | Single |
| Age at embarkation | 31 |
| Next of kin | Mother, Mrs E Gallagher, C/o Mr B Kelly, Inverell, New South Wales |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 33rd Battalion, C Company |
| AWM Embarkation Roll number | 23/50/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A74 Marathon on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 33rd Battalion |
| Fate | Returned to Australia |
| Miscellaneous information from cemetery records | Parents: Patrick Joseph and Eliza GALLAGHER |
| Family/military connections | Brothers: 2074 Pte Clarence GALLACHER, 33rd Bn, returned to Australia, 7 February 1919; 2072 Lance Corporal Stephen GALLAGHER, 33rd bn, effective abroad, (still overseas). |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
| Date of death | |
| Age at death | 53 |
| Place of burial | Rookwood Necropolis, New South Wales |