| Regimental number | 4166 |
| Place of birth | Warrnambool Victoria |
| Religion | Church of England |
| Occupation | Labourer |
| Address | 72 Eureka Street, Ballarat East, Victoria |
| Marital status | Married |
| Age at embarkation | 44 |
| Next of kin | Wife, Mrs A McMillan Cox, 72 Eureka Street, Ballarat East, Victoria |
| Enlistment date | 1 July 1915 |
| Rank on enlistment | Private |
| Unit name | 14th Battalion, 13th Reinforcement |
| AWM Embarkation Roll number | 23/31/4 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A64 Demosthenes on 29 December 1915 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 14th Battalion |
| Fate | Returned to Australia 27 September 1917 |
| Family/military connections | Son: 4167 Pte Clarence McMillan COX, 14th Bn, returned to Australia, 2 May 1919. |
