| Place of birth | Perth, Western Australia |
| Religion | Church of England |
| Occupation | Area officer |
| Address | Johnson Street, Guildford, Western Australia |
| Marital status | Single |
| Age at embarkation | 25 |
| Next of kin | Mother, Mrs Elizabeth Williams Barnes, Johnson Street, Guildford, Western Australia |
| Enlistment date | 9 September 1916 |
| Date of enlistment from Nominal Roll | 9 September 1916 |
| Rank on enlistment | 2nd Lieutenant |
| Unit name | 51st Battalion, 8th Reinforcement |
| AWM Embarkation Roll number | 23/68/3 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A35 Berrima on 23 December 1916 |
| Rank from Nominal Roll | Lieutenant |
| Unit from Nominal Roll | 51st Battalion |
| Fate | Returned to Australia 10 March 1918 |
| Family/military connections | Brothers: Captain Charles Albert BARNES, 11th Battalion, killed in action, Gallipoli, 28 April 1915; CPL Gordon Howard BARNES, 11th Battalion, killed in action, Lihons, France, 10 August 1918. |