| Regimental number | 2546 |
| Place of birth | Heidelburg, Victoria |
| School | Christian Brothers Catholic College, East Melbourne, Victoria |
| Religion | Roman Catholic |
| Occupation | Driver |
| Address | 229 Elgin Street, Carlton, Victoria |
| Marital status | Married |
| Age at embarkation | 39 |
| Next of kin | Wife, Mrs Annie Lonsdale Dunn, Gray Street, Hamilton, Victoria |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 3rd Pioneer Battalion, Reinforcement 4 |
| AWM Embarkation Roll number | 14/15/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A16 Port Melbourne on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 3rd Pioneer Battalion |
| Other details from Roll of Honour Circular | Pte James Dunn No 2207 7th Battalion died August 17th 1915 from wounds received at Lone Pine. |
| Fate | Killed in Action |
| Place of death or wounding | Passchendaele, Ypres, Belgium |
| Age at death | 39 |
| Age at death from cemetery records | 40 |
| Panel number, Roll of Honour, Australian War Memorial | 173 |
| Miscellaneous information from cemetery records | Parents: Edward and Margaret DUNN, husband of A.L. Dunn, 77 Victoria parade, Fitzroy, Victoria. Native of Heidelberg, Victoria |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |