| Regimental number | 1626 |
| Place of birth | Cootamundra, New South Wales |
| School | St Patrick's College, Goulburn, New South Wales |
| Religion | Roman Catholic |
| Occupation | Grazier |
| Address | Rathden, Cootamundra, New South Wales |
| Marital status | Single |
| Age at embarkation | 26 |
| Next of kin | Father, Patrick Callan, Rathden, Cootamundra, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 56th Battalion, 2nd Reinforcement |
| AWM Embarkation Roll number | 23/73/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A40 Ceramic on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 56th Battalion |
| Other details from Roll of Honour Circular | Enlisted January 1916; killed in action while stretcher bearing. |
| Fate | Killed in Action |
| Place of death or wounding | Villers-Bretonneux, France |
| Age at death | 28 |
| Age at death from cemetery records | 28 |
| Place of burial | Aubigny British Cemetery (Row B, Grave No. 1), Somme, France |
| Panel number, Roll of Honour, Australian War Memorial | 162 |
| Miscellaneous information from cemetery records | Commemorated in Cootamundra Cemetery, New South Wales. Parents: Patrick and Jane CALLAN, 'Rathden', Cootamundra, New South Wales |
| Family/military connections | Brother: 1625 Pte Francis Augustine CALLAN, Australian Army Ordnance Corps, returned to Australia, 23 July 1919. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |