| Regimental number | 2584 |
| Place of birth | Collingwood, Victoria |
| Religion | Roman Catholic |
| Occupation | Electric fitter |
| Address | Thornbury, Victoria |
| Marital status | Single |
| Age at embarkation | 18 |
| Height | 5' 4" |
| Weight | 132 lbs |
| Next of kin | Father, T Costello, Clifton, Plow Street, Thornbury, Victoria |
| Previous military service | Served for 4 years in the Senior Cadets (Area 54A); Volunteer Cadets, Abbotsford, Victoria. |
| Enlistment date | |
| Place of enlistment | Melbourne, Victoria |
| Rank on enlistment | Private |
| Unit name | 6th Battalion, 8th Reinforcement |
| AWM Embarkation Roll number | 23/23/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A68 Anchises on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 6th Battalion |
| Fate | Returned to Australia |
| Other details |
War service: Egypt Admitted to No 1 Australian General Hospital, Heliopolis, 28 September 1915 (swollen glands); transferred to Convlescent Camp, Suez, 22 October 1915. Commenced return to Australia from Suez on board HT 'Plassy', 31 October 1915; discharged (medically unfit: tubercular glands, neck), Melbourne, 20 February 1916. Medals: 1914-15 Star, British War Medal, Victory Medal |
| Miscellaneous details | See 1662 Thomas COSTELLO for second period of service. |
| Sources | NAA: B2455, COSTELLO Thomas |