| Regimental number | 7802 |
| Date of birth | 12 June (1899 or 1900) |
| Place of birth | Gympie, Queensland |
| Religion | Presbyterian |
| Occupation | Clerk |
| Address | Warwick, Queensland |
| Marital status | Single |
| Age at embarkation | 19 |
| Next of kin | Grandparents, Mrs E J Cox, Percy Street, Warwick, Queensland |
| Enlistment date | 4 September 1917 |
| Rank on enlistment | Private |
| Unit name | 9th Battalion, 26th Reinforcement |
| AWM Embarkation Roll number | 23/26/5 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A14 Euripides on 31 October 1917 |
| Regimental number from Nominal Roll | 7802A |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 15th Battalion |
| Fate | Returned to Australia 6 May 1919 |
| Discharge date | 8 December 1915 |
| Other details | Was under age when he enlisted. At the end of the war Leslie Cox worked in London for a short time before being discharged in Australia. Whilst on active service he suffered from gassing. |
| Date of death | 28 September 1954 |
| Place of burial | Springvale Crematorium |
