| Regimental number | 6733 |
| Place of birth | Geraldton, Western Australia |
| School | Narngalu State School near Geraldton, Western Australia |
| Religion | Church of England |
| Occupation | Farmer |
| Address | Narngulu, Western Australia |
| Marital status | Single |
| Age at embarkation | 20 |
| Height | 5' 11.5" |
| Weight | 151 lbs |
| Next of kin | Father, R H Cowan, Narngulu via Geraldton, Western Australia |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Geraldton, Western Australia |
| Rank on enlistment | Private |
| Unit name | 11th Battalion, 22nd Reinforcement |
| AWM Embarkation Roll number | 23/28/4 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A8 Argyllshire on |
| Rank from Nominal Roll | Lieutenant |
| Unit from Nominal Roll | Australian Flying Corps |
| Fate | Died of illness |
| Place of death or wounding | Glencorse Wood, Ypres, Belgium |
| Age at death | 23 |
| Age at death from cemetery records | 22 |
| Place of burial | Longuenesse (St. Omer) Souvenir Cemetery (Plot V, Row E, Grave No. 35), France |
| Panel number, Roll of Honour, Australian War Memorial | 188 |
| Miscellaneous information from cemetery records | Parents: Robert and Rosa COWAN, Hillsview, Narngulu, Western Australia. Native of Geraldton, Western Australia |
| Family/military connections | Cousin: 3618 Pte Raymond COWAN, 10th Light Horse Regiment, died of disease, 24 October 1918. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
| Sources | NAA: B2455, COWAN Gerald Henderson |