
| Regimental number | 229 |
| Place of birth | Sydney New South Wales |
| Religion | Church of England |
| Occupation | Labourer |
| Address | Northcote Street, Sans Souci, New South Wales |
| Marital status | Single |
| Age at embarkation | 24 |
| Next of kin | Mother, Mrs Alice Gardiner, Northcote Street, Sans Souci, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 17th Battalion, A Company |
| AWM Embarkation Roll number | 23/34/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board Transport A32 Themistocles on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 17th Battalion |
| Fate | Died of disease |
| Miscellaneous details (Nominal Roll) | *Spelt Sidney Gardiner on NR |
| Age at death from cemetery records | 26 |
| Place of burial | Tidworth Military Cemetery (Row C, Grave No. 232), North Tidworth, Wiltshire |
| Panel number, Roll of Honour, Australian War Memorial | 82 |
| Miscellaneous information from cemetery records | Parents: Thomas and Alice GARDINER, 66 Douglas Street, Stannmore, Sydney. Cemetery details show spelling as "Sidney" Gardiner |