| Schultze | W. A. | Wubin | Chevrolet | DL ● 116 | Dalwallinu Road Board | 1927-28 |
| Schulz | C. A. | Kulyalling | Ford | BO ● 38 | Brookton Road Board | 1923-24 |
| Schulz | C. A. | Kulyalling | Ford | BO ● 38 | Brookton Road Board | 1924-25 |
| Schulz | C. A. | Kulyaling | Ford | BO ● 38 | Brookton Road Board | 1926-27 |
| Schulz | C. A. | Kulyalling | Ford | BO ● 38 | Brookton 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 |
| Schurer | W. A. | Albany | Overland | A 48 | Municipality of Albany | 1925-26 |
| Schurer | W. A. | Albany | Oakland | A 48 | Municipality of Albany | 1926-27 |
| Schurer | W. A. | Albany | Fiat | A 48 | Albany Municipality | 1927-28 |
| Schurer | Walter | Tambellup | Oakland | TA ● 10 | Tambellup Road Board | 1922-23 |
| Schurer | Walter | Tambellup | Oakland | TA ● 10 | Tambellup Road Board | 1923-24 |
| Schurman | F. L. | Cardiff | Overland | CO ● 2 | Collie Road Board | 1922-23 |
| Schurman | F. L. | Cardiff | Overland | CO ● 2 | Collie Road Board | 1923-24 |
| Schurman | F. L. | Cardiff | Overland | CO ● 2 | Collie Road Board | 1924-25 |
| Schurmann | K. H. H. | 113 Flinders Street, Mount Hawthorn | Ford Wagon | 14601 | Metro Private Car | 1927-28 |
| Schuttioffel | H. | South Kumminin | Ford | NB ● 157 | Narembeen Road Board | 1927-28 |
| Schwartz | H. T. | Bruce Rock | Ford | BK ● 138 | Bruce Rock Road Board | 1924-25 |
| Schwartz | H. T. | Narembeen | Ford | NB ● 56 | Narembeen Road Board | 1925-26 |
| Schwartz | H. T. | Eugynin | Ford | BK ● 138 | Bruce Rock Road Board | 1925-26 |
| Schwartz | H. T. | Eugynin | Ford | BK ● 138 | Bruce Rock Road Board | 1926-27 |
| Schwartz | H. T. | Narembeen | Ford | NB ● 56 | Narembeen Road Board | 1926-27 |
| Schwartz | H. T. | Narembeen | Ford Truck | NB ● 81 | Narembeen Road Board | 1926-27 |
| Schwartz | H. T. | Narembeen | Ford | NB ● 56 | Narembeen Road Board | 1927-28 |
| Schwartz | H. T. | Narembeen | Ford Truck | NB ● 81 | Narembeen Road Board | 1927-28 |
| Sclater | A. | Coolgardie | Chevrolet Truck | CG ● 17 | Coolgardie Road Board | 1927-28 |
| Scoll | W. P. | Bridgetown | Dodge | B ● 150 | Bridgetown Road Board | 1926-27 |
| Scorer | A. J. W. | Holland Street, East Fremantle | Whippet | 15884 | Metro Private Car | 1927-28 |
| Scorer | P. C. | 62 Holdsworth Street, Fremantle | Overland | 12209 | Metro Private Car | 1926-27 |
| Scorer | P. C. | 62 Holdsworth Street, Fremantle | Overland | 12209 | Metro Private Car | 1927-28 |
| Scorer | P. F. C. | 62 Holdsworth Street, Fremantle | Ford Truck | 10134 | Metro Hire or Trade | 1926-27 |
| Scorer | P. F. C. | 62 Holdsworth Street, Fremantle | Ford Truck | 10134 | Metro Hire or Trade | 1927-28 |
| Scorer | W. | Blince Street, Fremantle | Whippet | 12295 | Metro Private Car | 1926-27 |
| Scorer | W. | Blince Street, Fremantle | Whippet | 12295 | Metro Private Car | 1927-28 |
| Scot Bros. | - | - | Ford 20 H.P. | Y ● 6 | York Road Board | 1919 |
| Scotland | T. | Kulin | Dodge Truck | KU ● 39 | Kulin Road Board | 1926-27 |
| Scotland | T. | Kulin | Dogde Truck | KU ● 39 | Kulin Road Board | 1927-28 |
| Scotney | H. A. | Kondut | Ford Truck | WB ● 136 | Wongan-Ballidu Road Board | 1927-28 |
| Scotson | S. | Ora Banda | Ford | K ● 14 | Kalgoorlie Road Board | 1923-24 |
| Scott | A P. | Moora | Chevrolet | M ● 113 | Moora Road Board | 1925-26 |
| Scott | A. | Quairading | Hupmobile | Q ● 41 | Quairading Road Board | 1923-24 |
| Scott | A. | Quairading | Hupmobile | Q ● 41 | Quairading Road Board | 1924-25 |
| Scott | A. | Quairading | Hupmobile | Q ● 41 | Quairading Road Board | 1925-26 |
| Scott | A. | Quairading | Hupmobile | Q ● 41 | Quairading Road Board | 1926-27 |
| Scott | A. | Quairading | Hupmobile | Q ● 41 | Quairading Road Board | 1927-28 |
| Scott | A. B. | Fitxroy Crossing via Derby | Dodge | KW ● 12 | West Kimberley Road Board | 1924-25 |
| Scott | A. B. | Fitzroy Crossing | Dodge | KW ● 28 | West Kimberley Road Board | 1925-26 |
| Scott | A. B. | Fitzroy Crossing | Dodge | KW ● 28 | West Kimberley Road Board | 1926-27 |
| Scott | A. B. | Fitzroy Crossing | Chrysler | KW ● 68 | West Kimberley Road Board | 1927-28 |
| Scott | A. E. | Leonora | Douglas 2¾ H.P. Motorcycle | ML ● 25 | Leonora-Malcolm Road Board | 1917-18 |
