| Regimental number | 26870 |
| Occupation | Storekeeper |
| Next of kin | Father, George Mackay, 30 Wood Street, Ponsonby, Auckland |
| Rank on embarkation | Private |
| Enlistment status | Volunteer |
| Unit name | New Zealand Expeditionary Force, 17th Reinforcements, Auckland Infantry Battalion, A Company |
| Embarkation details | Unit embarked from Wellington on board HMNZT 64 Devon on |
| Final rank | Private |
| Final unit | 2nd Battalion, Auckland Infantry Regiment |
| Fate | Died of wounds |
| Age at death from cemetery records | 26 |
| Place of burial | Etaples Military Cemetery (Plot XXII, Row M, Grave No 12), France |
| Miscellaneous information from cemetery records | Parents: George Johnson Mackay and Jane Mackay, Auckland |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
| Sources | Nominal Roll Vol. 2: Roll 41, p. 6 |