| Salvation Army | South Australia | Ban on playing on Sundays. |
| Seals for closing a telegram | Australia | Telegraph seals/stamps printed in red during the Interim period. |
| Secrecy of messages | Queensland | Court ruling on divulging the contents of a telegram. |
| Queensland | The Post and Telegraph Master at Charleville revealed the contents of a telegram. | |
| Semaphore | New South Wales | South Head to Fort Phillip. |
| Ship to ship communication | ||
| Ships | Cable ships laying Australian cables. | |
| Telegrams sent to ships pre-1901. | ||
| Shipwreck | Victoria | |
| Western Australia | Dutch brig 1880, | |
| South Australia | The Admella in 1859 off Kapunda. | |
| South Australia | The Steamer Clan Ranald off Edithburg 1909. | |
| Sholl, R. A. | Western Australia | Postmaster-General 1889 - 1904. |
| Short messages | Tasmania | Shortest message recorded (TC-DO-3E). |
| Silk | Penrith, NSW | Production by Mr. Croft of the Telegraph Department. |
| Silver finds | New South Wales | |
| Slogans | Australia | Slogan postmarks advertising telegrams |
| Sobriety | Tasmania | Opening the road to Queenstown. |
| Soccer | New South Wales | The first recorded Soccer game - between Germanton and Yarra Yarra - in New South Wales. |
| South Australia | Reports | Todd 1859. |
| Reports | Todd 1861. | |
| Specimens | Australia | Telegrams overprinted for distribution as specimens of the form or for advertising - for example 1954 Congratulations. |
| Spelling error | South Australia | On Colonial delivery SC-DO-6A. |
| Australia | On Telecom 1987 envelope AT-EO-20G. | |
| Spiders | South Australia | Spiders interrupting transmission. |
| Sport - Cricket | Victoria | Cricket Ground. |
| Australia | Bill Johnston | |
| Australia | Ray Lindwall | |
| Australia | Stan McCabe. | |
| Australia | Introduction of broadcasting cricket matches. | |
| Sport - rifle shooting | South Australia | Competition between Portland (Vic) and Robe BY TELEGRAPH (1862). |
| Sport - Rugby league | Australia | Graham Eadie (Manly) |
| Stamp Duty | Western Australia | The instant creation of a new denomination. |
| Stamps | Australia | Use of postage stamps to pay cost of a telegram (see also the main menu for each Colony at the top). |
| Australia | Telegraph seals/stamps printed in red during the Interim period. | |
| Australia | Stamps issued to commemorate telegraph anniversaries. | |
| South Australia | Superintendent of Telegraphs overprints. | |
| Telegraph stamps. | New South Wales. | |
| Western Australia. | ||
| Australia | Seal used in Western Australia or Victoria. | |
| Foreign | Examples of telegraph stamps used in the late 1880s. | |
| Stamps, Collar | Australia | Advertising services of a company. |
| Standards | Australia | Window envelopes - UPU and ISO |
| Standardisation | Time and distance in regions using the telegraph lines. | |
| Strike | Western Australia | Strike by the operators at Coolgardie, Hannan's and Kanowa. |
| Swan, Black | Western Australia | Death of a Black Swan near Northam. |
| Switzerland | Brief history of telegraphs. | Development of the telegraph: by the people, for the people!! |
| Telegraph stamps | ||
| Sydney Harbour Bridge | Australia | Telegrams celebrating the Opening |