| Regimental number | 1529 |
| Religion | Presbyterian |
| Occupation | Farmer |
| Address | Glenalbyn, Katanning, Western Australia |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, Henry De Marchi, Wedderburn, Victoria |
| Enlistment date | 3 May 1915 |
| Date of enlistment from Nominal Roll | 3 May 1915 |
| Rank on enlistment | Private |
| Unit name | 28th Battalion, 1st Reinforcement |
| AWM Embarkation Roll number | 23/45/2 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A2 Geelong on 5 June 1915 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 28th Battalion |
| Fate | Returned to Australia 2 January 1919 |
| Family/military connections | Brothers: 2384 Pte Alexander DE MARCHI, 1st Light Horse Regiment, returned to Australia, 24 July 1919; 2018 Pte Ernest William DEMARCHI, 10th Field Artillery Brigade, returned to Australia, 21 July 1918. |
