| Regimental number | 57166 |
| Date of birth | |
| Place of birth | Eastwood, South Australia |
| Religion | Church of England |
| Occupation | Clerk |
| Address | 34 College Street, Kent Town, South Australia |
| Marital status | Married |
| Age at embarkation | 21 |
| Height | 5' 8" |
| Weight | 150 lbs |
| Next of kin | Wife, Mrs Dorothy May Johnsson, 2 Wellington Square, North Adelaide, South Australia |
| Previous military service | Served for 4 years in Senior Cadets, transferred to 23rd Light Horse |
| Enlistment date | |
| Place of enlistment | Adelaide, South Australia |
| Unit name | 3rd General Service Reinforcements (Egypt) (South Australia) |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A18 Wiltshire on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 3rd Light Horse Regiment |
| Fate | Returned to Australia |
| Discharge date | |
| Other details |
War service: Egypt Commenced return to Australia on board HT 'Orari', 16 May 1919; disembarked Adelaide, 26 June 1919; discharged (termination of period of enlistment), Adelaide, 12 July 1919. Medal: British War Medal |
| Sources | NAA: B2455, JONSSON Oscar Leslie |