| Regimental number | 2384 |
| Religion | Presbyterian |
| Occupation | Station hand |
| Address | Redcliffe, Western Australia |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Father, Henry Jacob DeMarchi, Wederburn, Victoria |
| Enlistment date | 14 December 1915 |
| Date of enlistment from Nominal Roll | 6 December 1915 |
| Rank on enlistment | Private |
| Unit name | 10th Light Horse Regiment, 16th Reinforcement |
| AWM Embarkation Roll number | 10/15/3 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A52 Surada on 16 May 1916 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 1st Light Horse Regiment |
| Fate | Returned to Australia 24 July 1919 |
| Family/military connections | Brothers: 2018 Pte Ernest William DEMARCHI, 10th Field Artillery Brigade, returned to Australia, 21 July 1918; 1529 Pte Harry Cuthbert DE MARCHI, 28th Bn, returned to Australia, 2 January 1919. |