| Regimental number | 2304 |
| Place of birth | Ardglen New South Wales |
| School | Murrurundi, New South Wales |
| Other training | Pupil teacher |
| Religion | Roman Catholic |
| Occupation | Teacher |
| Address | Ardglen, New South Wales |
| Marital status | Single |
| Age at embarkation | 38 |
| Next of kin | Brother, James Costello, Murrurundi, New South Wales |
| Previous military service | Nil |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 30th Battalion, 4th Reinforcement |
| AWM Embarkation Roll number | 23/47/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A67 Orsova on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 30th Battalion |
| Fate | Killed in Action |
| Miscellaneous details (Nominal Roll) | *Noted COSTELLO John Lawrence NR |
| Place of death or wounding | Pozieres, Somme Sector, France |
| Age at death | 39 |
| Place of burial | Rue-David Military Cemetery (Plot I, Row E, Grave No. 35), Fleurbaix, France |
| Panel number, Roll of Honour, Australian War Memorial | 116 |
| Miscellaneous information from cemetery records | Parents: James and Ellen COSTELLO |
| Family/military connections | Brother: Pte V.N.R. Costello 1543, 1st ALH mentioned in despatches; Nephew Cpl D.J. Fraser 31127, 9th ALTMBty MM |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
