| Regimental number | 3002 |
| Place of birth | Tenterfield New South Wales |
| Religion | Roman Catholic |
| Occupation | Labourer |
| Address | Tenterfield, New South Wales |
| Marital status | Single |
| Age at embarkation | 25 |
| Next of kin | Father, William Heffernan, Mole River, New South Wales |
| Enlistment date | 30 March 1916 |
| Rank on enlistment | Private |
| Unit name | 1st Light Horse Regiment, 22nd Reinforcement |
| AWM Embarkation Roll number | 10/6/5 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A13 Katuna on 23 November 1916 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 1st Light Horse Regiment |
| Fate | Returned to Australia 21 May 1917 |
| Family/military connections | Brother: 3001 Pte James Oliver HEFFERNAN, 1st Light Horse Regiment, returned to Australia, 13 March 1919. |
| Other details | Medals: British War Medal, Victory Medal |
