| Regimental number | 717 |
| Place of birth | Stawell, Victoria |
| School | St Patrick's Roman Catholic School |
| Religion | Roman Catholic |
| Occupation | Amalgamator |
| Address | Canterbury, Victoria |
| Marital status | Single |
| Age at embarkation | 32.4 |
| Height | 5' 9.75" |
| Weight | 139 lbs |
| Next of kin | Mother, Mrs Mary Cahill, Canterbury, Victoria |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Prahran, Victoria |
| Rank on enlistment | Lance Corporal |
| Unit name | 37th Battalion, B Company |
| AWM Embarkation Roll number | 23/54/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A34 Persic on |
| Regimental number from Nominal Roll | Commissioned |
| Rank from Nominal Roll | Lieutenant |
| Unit from Nominal Roll | 39th Battalion |
| Recommendations (Medals and Awards) |
Mention in Despatches Recommendation date: |
| Fate | Killed in Action |
| Place of death or wounding | Suzanne, France |
| Age at death | 34 |
| Age at death from cemetery records | 34 |
| Place of burial | Hem Farm Military Cemetery (Plot II, Row C, Grave No. 17), Hem-Monacu, France |
| Panel number, Roll of Honour, Australian War Memorial | 131 |
| Miscellaneous information from cemetery records | Parents: William and Mary CAHILL, 21 Hilda Crescent, Hawthorn, Victoria |
| Family/military connections | Brothers: Pte Francis Cahill, Pte Richard Cahill, Lt Martin Cahill MC. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
| Sources | NAA: B2455, CAHILL Thomas Kevin |