| Sidney | F | 326 | Trooper | Source: Nominal roll in WO127 |
| Siebeck | Richard | 33131 | Acting Corporal | Source: Nominal roll in WO127 |
| Simkins | W R | 1200 | Trooper | Source: Nominal roll in WO127 |
| Simmons | Joseph Henry | 1082 | Trooper | Source: Nominal roll in WO127 |
| Simpkiss | Henry Stoner | 234 | Trooper | Source: Nominal roll in WO127 |
| Simpson | Alexander | 43096 | Trooper | Source: Nominal roll in WO127 |
| Simpson | G | 1214 | Trooper | Source: Nominal roll in WO127 |
| Simpson | G | 1092 | Trooper | Source: Nominal roll in WO127 |
| Sinclair | John | 150 | Trooper | Source: Nominal roll in WO127 |
| Sivertson | L | 226 | Trooper | Source: Nominal roll in WO127 |
|
|
