| Regimental number | 1789 |
| Other Names | CLARKE, Johnnonr |
| Religion | Church of England |
| Occupation | Motor mechanic |
| Address | Mainside near Winton, Queensland |
| Marital status | Single |
| Age at embarkation | 45 |
| Next of kin | Brother, Thomas Clarke, Mainside near Winton, Queensland |
| Enlistment date | 8 July 1915 |
| Rank on enlistment | Private |
| Unit name | 25th Battalion, 2nd Reinforcement |
| AWM Embarkation Roll number | 23/42/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A9 Shropshire on 20 August 1915 |
| Other details from Roll of Honour Circular | Enlisted 8 July 1915 - 2nd Rfcts 25 Btn; TOS, 25 Btn 12 October 1915. |
| Place of death or wounding | Pozieres, Somme Sector, France |
| Age at death | 44 |
