| Regimental number | 407 |
| Place of birth | Mosquito Island New South Wales |
| Religion | Roman Catholic |
| Occupation | Farmer |
| Address | Newcastle, New South Wales |
| Marital status | Single |
| Age at embarkation | 26 |
| Next of kin | Father, Joseph Dempsey, Mosquito Island, Newcastle, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 34th Battalion, B Company |
| AWM Embarkation Roll number | 23/51/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A20 Hororata on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 34th Battalion |
| Fate | Returned to Australia |
| Family/military connections | Brother: 1471 Driver Raymond Francis DEMPSEY, 10th Field Artillery Brigade, killed in action, 5 April 1918. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |