| Regimental number | 309 |
| Place of birth | Snowtown South Australia |
| Religion | Church of England |
| Occupation | Farmer |
| Address | Kadina, South Australia |
| Marital status | Single |
| Age at embarkation | 26 |
| Next of kin | Mrs. W. Jacob, Kadina, South Australia |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 3rd Light Horse Regiment, B Squadron |
| AWM Embarkation Roll number | 10/8/1 |
| Embarkation details | Unit embarked from Adelaide, South Australia, on board HMAT A17 Port Lincoln on |
| Regimental number from Nominal Roll | Commissioned |
| Rank from Nominal Roll | Lieutenant |
| Unit from Nominal Roll | 51st Battalion |
| Fate | Returned to Australia |
| Family/military connections | Brothers: 2020 Pte Jack JACOB, Australian Army Service Corps, returned to Australia, 29 July 1915; [770] Lt Kenneth Grant JACOB, 12th Bn, killed in action, 30 May 1918; Lt Colonel Ross Blyth JACOB, 10th Bn, returned to Australia, 31 July 1918. |
| Other details |
War service: Egypt, Gallipoli, Western Front Medals: 1914-15 Star, British War Medal, Victory Medal |