| Saw | Mrs M. G. | 4 Bellevue Terrace, Perth | Studebaker | 6676 | Metro Private Car | 1925-26 |
| Saw | Mrs M. G. | 4 Bellevue Terrace, Perth | Studebaker | 6676 | Metro Private Car | 1926-27 |
| Saw | Mrs M. G. | 4 Bellevue Terrace, Perth | Studebaker | 6676 | Metro Private Car | 1927-28 |
| Sawyer | G. A. | Palgarup | Studebaker | WA ● 106 | Manjimup Road Board | 1925-26 |
| Sawyer | G. A. | Palgarrup | Studebaker | WA ● 113 | Manjimup Road Board | 1926-27 |
| Sawyer | G. J. | 5 Duke Street, Subiaco | Ford | 7764 | Metro Private Car | 1925-26 |
| Sawyer | G. J. | 5 Durke Street, Subiaco | Ford | 7764 | Metro Private Car | 1926-27 |
| Sawyer | G. J. | 5 Duke Street, Subiaco | Ford | 7764 | Metro Private Car | 1927-28 |
| Scadden | Herbert | Lake Brown | Ford | MD ● 119 | Merredin Road Board | 1927-28 |
| Scadding | W. | Kulin | Studebaker | RE ● 76 | Roe Road Board | 1925-26 |
| Scadding | W. | Kulin | Studebaker | KU ● 59 | Kulin Road Board | 1927-28 |
| Scaddon | J. N. | Cunderdin | Ford Truck | ME ● 223 | Meckering Road Board | 1926-27 |
| Scaddon | J. N. | Cunderdin | Ford Truck | ME ● 223 | Meckering Road Board | 1927-28 |
| Scanion & Simper | - | Fremantle Markets | Chevrolet | 1908 | Metro Private Car | 1927-28 |
| Scanion & Simper Ltd | - | Fremantle Markets Fremantle | Ford | 5068 | Metro Private Car | 1926-27 |
| Scanion & Simper Ltd | - | Fremantle Markets Fremantle | Ford | 5068 | Metro Private Car | 1927-28 |
| Scanlon & Simper | - | Fremantle Markets | Ford Truck | 1860 | Metro Private Car | 1926-27 |
| Scanlon & Simper | - | Fremantle Markets | Chevrolet | 1908 | Metro Private Car | 1926-27 |
| Scanton & Simper Ltd | - | Fremantle Markets Fremantle | Ford | 5068 | Metro Private Car | 1925-26 |
| Scari | J. | Pickering | Chevrolet | DR ● 91 | Darling Range Road Board | 1926-27 |
| Schleicker | H. E. | Wagin | Chevrolet | W ● 148 | Wagin Road Board | 1927-28 |
| Schmidt | E. | Albany Road, Kenwick | Oakland | 12648 | Metro Private Car | 1927-28 |
| Schmidt | H. G. | Albany Road, Kenwick | Ford | 12639 | Metro Private Car | 1927-28 |
| Schocker | A. | 1798 Carrington Street | B.S.A. 4 H.P. | - | Kalgoorlie Road Board | 1919 |
| Schocker | Wm. | Carrington Street, Kalgoorlie | Studebaker 25 H.P. | K 8 | Kalgoorlie Road Board | 1916 |
| Schocker | Wm. | Carrington Street, Kalgoorlie | Studebaker 25 H.P. | K ● 8 | Kalgoorlie Road Board | 1917-18 |
| Schocker | Wm. | 1798 Carrington Street | Studebaker 25 H.P. | K ● 10 | Kalgoorlie Road Board | 1919 |
| Scholl | F. J. | - | Studebaker 15-20 H.P. | Wms 8 | Williams Road Board | 1915 |
| Schoolar | G. P. | 72 Barker Road, Subiaco | Oakland | 816 | Metro Private Car | 1922-23 |
| Schoolar | Geo. P. | 72 Barker Road, Subiaco | Oakland | 816 | Metro Private Car | 1923-24 |
| Schoolar | Geo. P. | 72 Baker Road, Subiaco | Oakland | 816 | Metro Private Car | 1924-25 |
| Schorer | A. M. | Doodlakine | Ford | KE ● 19 | Kellerberrin Road Board | 1924-25 |
| Schrodder | F. A. | Pingrup | Rugby | KT ● 24 | Kent Road Board | 1926-27 |
| Schroder | F. A. | Pingrup | Rugby | KT ● 24 | Kent Road Board | 1925-26 |
| Schroder | F. A. | Pingrup | Rugby | KT ● 24 | Kent Road Board | 1927-28 |
| Schultz | A. H. T. | Katanning | Studebaker | KA ● 217 | Katanning Road Board | 1925-26 |
| Schultz | A. H. T. | Katanning | Studebaker | KA ● 217 | Katanning Road Board | 1926-27 |
| Schultz | E. P. | Wickepin | Ford Truck | WK ● 159 | Wickepin Road Board | 1925-26 |
| Schultz | E. P. | Wickepin | Ford Truck | WK ● 159 | Wickepin Road Board | 1926-27 |
| Schultz | J. W. | Wickepin | Ford | WK ● 18 | Wickepin Road Board | 1925-26 |
| Schultz | J. W. | Wickepin | Ford | WK ● 18 | Wickepin Road Board | 1927-28 |
| Schultz | W. J. | Wickepin | Ford | WK ● 18 | Wickepin Road Board | 1923-24 |
| Schultz | W. J. & Sons | Wickepin | Ford | WK ● 18 | Wickepin Road Board | 1924-25 |
| Schultz. | A. H. T. | Katanning | Studebaker | KA ● 217 | Katanning Road Board | 1927-28 |
| Schulze & Sons | - | Wickepin | Ford 20 H.P. | WK ● 18 | Wickepin Road Board | 1917-18 |
| Schulze & Sons | - | Wickepin | Ford 20 H.P. | WK ● 18 | Wickepin Road Board | 1919 |
| Scott | A. W. | 4 Blake Street, North Perth | Indian 7 H.P. Motorcycle | P 851 | Perth Municipality | 1917-18 |
| Scott | A. W. | 4 Blake Street, North Perth | Indian 7-9 H.P. | P 851 | Perth Municipality | 1919 |
| Scott | A. W. | Blake Street, North Perth | Ford | 1203 | Metro Private Car | 1922-23 |
| Scott | C. G. | Kellerberrin | Rugby | KE ● 152 | Kellerberrin Road Board | 1925-26 |
