| Regimental number | 20921 |
| Place of birth | Newcastle, New South Wales |
| School | Marist Brothers School. |
| Religion | Roman Catholic |
| Occupation | Draper's assistant |
| Address | Church Street, Mayfield, Newcastle, New South Wales |
| Marital status | Single |
| Age at embarkation | 22 |
| Height | 5' 6" |
| Weight | 112 lbs |
| Next of kin | Mother, Mrs A Coghlan, Church Street, Mayfield, Newcastle, New South Wales |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Brisbane, Queensland |
| Rank on enlistment | Gunner |
| Unit name | 9th Field Artillery Brigade, 34th Battery |
| AWM Embarkation Roll number | 13/36(a)/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A8 Argyllshire on |
| Rank from Nominal Roll | Gunner |
| Unit from Nominal Roll | 12th Field Artillery Brigade |
| Fate | Died of wounds |
| Age at death from cemetery records | 23 |
| Place of burial | Grevillers British Cemetery (Plot II, Row C, Grave No 9), Picardie, France |
| Panel number, Roll of Honour, Australian War Memorial | 17 |
| Miscellaneous information from cemetery records | Parents: Michael Patrick and Annie COGHLAN, 1 Church Street, Mayfield, New South Wales |
| Family/military connections | Brothers: 389 Pte Edward Joseph COGHLAN, 30th Bn, returned to Australia, 8 April 1919; 3130 Pte Richard Patrick COGHLAN, 56th Bn, returned to Australia, 23 May 1917. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
| Sources | NAA: B2455, COGHLAN Michael George |