| Date of birth | |
| Place of birth | Belfast, Co Antrim, Ireland |
| Religion | Congregational |
| Occupation | Congregational minister |
| Address | Burwood, New South Wales |
| Marital status | Married |
| Age at embarkation | 35 |
| Next of kin | Wife, Mrs L E Dempsey, Ethel Street, Burwood, New South Wales |
| Previous military service | Served in Australian Military Forces; still serving at time of AIF enlistment. |
| Enlistment date | |
| Rank on enlistment | Chaplain (4th Class) |
| Unit name | Chaplains' Corps |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A7 Medic on |
| Rank from Nominal Roll | Chaplain |
| Unit from Nominal Roll | Chaplains' Department |
| Promotions |
Captain Unit: Chaplains' Corps (Congregational) Promotion date: |
| Fate | Died of disease |
| Age at death from cemetery records | 36 |
| Place of burial | Cairo War Memorial Cemetery (Row F, Grave No. 262), Egypt. |
| Panel number, Roll of Honour, Australian War Memorial | 185 |
| Miscellaneous information from cemetery records | Parents: Patrick and Martha DEMPSEY, husband of Lily E. DEMPSEY, Ethel Street, Burwood, New South Wales |
| Other details |
War service: England, Egypt Embarked Melbourne, 16 December 1916; disembarked Plymouth, England and granted 8 days leave: 4 days with pay, 4 days without pay, 18 February 1917. Proceeded overseas to Egypt, 28 March 1917; disembarked Alexandria, Egypt, 29 April 1917. Admitted to 14th Australian General Hospital, Cairo, Egypt, 30 April 1917 (pyrexia); reported as 'dangerously ill', 4 June 1917. Died of disease, Egypt, 13 June 1917 (septic pneumonia). Medal: British War Medal |
| Miscellaneous details | Appointment for continuous service. |