| Regimental number | 2434 |
| Place of birth | Singleton New South Wales |
| Religion | Presbyterian |
| Occupation | Butcher |
| Address | 'Devoncourt', Burwood Road, Concord, Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 29 |
| Next of kin | Father, Mr William Duthie Longmuir, 'Devoncourt', Burwood Road, Concord, Sydney, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 53rd Battalion, 5th Reinforcement |
| AWM Embarkation Roll number | 23/70/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A47 Mashobra on |
| Rank from Nominal Roll | Corporal |
| Unit from Nominal Roll | 53rd Battalion |
| Fate | Returned to Australia |
| Family/military connections | Brothers: 3324 Pte William Keith LONGMUIR, Australian Army Medical Corps, returned to Australia, 19 April 1919; 5967 Lance Corporal Colin Kenneth LONGMUIR, Australian Army Medical Corps, returned to Australia, 18 October 1917. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |