| Scaddon | J. N. | Cunderdin | Ford Truck | ME ● 223 | Meckering Road Board | 1927-28 |
| Scaife | R. | - | Chevrolet | NR ● 24 | Northampton Road Board | 1926-27 |
| Scales | A. C. | Kalgoorlie Hotel, Perth | Dodge | 3011 | Metropolitan Hire and Trade Cars | 1923-24 |
| Scales | A. C. | Kalgoorlie Hotel, Perth | Dodge | 3011 | Metro Hire or Trade | 1925-26 |
| Scally | A. J. | Bullaring | Ford | CR ● 235 | Corrigin Road Board | 1927-28 |
| Scally | Cedric | Bencubbin | Ford | MM ● 20 | Mount Marshall Road Board | 1927-28 |
| Scammell | Wm. | Paton Boyup Brook | B.S.A. Motorcycle | BU ● 10 | Upper Blackwood Road Board | 1922-23 |
| Scanian | J. P. | Albany | Ford | A 111 | Albany Municipality | 1927-28 |
| Scanion | R. | Emu Hill | Ford Wagon | NB ● 202 | Narembeen 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 |
| Scanlan & Simper | - | Fremantle | Ford Wagon | 15870 | Metro Private Car | 1927-28 |
| Scanlon | T. P. | Wagin | Ford 20 H.P. | W ● 24 | Wagin Road Board | 1919 |
| Scanlon | T. P. | Wagin | Ford 20 H.P. | W ● 24 | Wagin Road Board | 1922-23 |
| Scanlon | T. P. | Wagin | Ford 20 H.P. | W ● 24 | Wagin Road Board | 1923-24 |
| Scanlon | T. P. | Wagin | Ford | W ● 24 | Wagin Road Board | 1924-25 |
| Scanlon | T. P. | Wedgecarrup | Ford | W ● 24 | Wagin Road Board | 1926-27 |
| Scanlon | T. P. | Wedgecarrup | Ford | W ● 24 | Wagin Road Board | 1927-28 |
| Scanlon | T. P. | Wedgecarrup | Essex | W ● 28 | Wagin Road Board | 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 | T. P. | Wedgecarrup | Ford | W ● 24 | Wagin Road Board | 1925-26 |
| Scanton & Simper Ltd | - | Fremantle Markets Fremantle | Ford | 5068 | Metro Private Car | 1925-26 |
| Scarborough | A. | Katanning | Austin | KA ● 123 | Katanning Road Board | 1927-28 |
| Scarden | W. | Fitzgerald Street | Ford 20 H.P. | N 34 | Northam Municipality | 1916 |
| Scargood & Co | - | William Street, Perth | Ford | 1165 | Metro Private Car | 1922-23 |
| Scari | J. | Pickering | Chevrolet | DR ● 91 | Darling Range Road Board | 1926-27 |
| Scari | J. | Barton's Mill | Chevrolet | DR ● 91 | Darling Range Road Board | 1927-28 |
| Scarle | A. | Clifton Street, Nedlands | Hudson | 10433 | Metro Hire or Trade | 1926-27 |
| Scarlet Bros. | - | Korrelocking | Essex | WM ● 5 | Wyalkatchem Road Board | 1923-24 |
| Scarlett | J. C. | Watercanan | Ford Truck | D ● 151 | Dowerin Road Board | 1926-27 |
| Scarlett | J. C. | Watercanan | Ford Truck | D ● 151 | Dowerin Road Board | 1927-28 |
| Scarlett | John C. | 382 Beaufort Street, Perth | Harley Davidson & Sidecar | 1164 | Metro Motorcycle | 1922-23 |
| Scarlett | M. C. | Wattercarran | Nash | D ● 116 | Dowerin Road Board | 1925-26 |
| Scarlett | M. C. | Wattercarran | Nash | D ● 116 | Dowerin Road Board | 1926-27 |
| Scarlett | M. C. | Wattercarran | Nash | D ● 116 | Dowerin Road Board | 1927-28 |
| Scarlett | P. A. | Preston | Overland | PE ● 12 | Preston Road Board | 1917-18 |
| Scarlett | P. A. | Preston | Overland | PE ● 12 | Preston Road Board | 1919 |
| Scarlett | R. A. | Preston | Overland | PE ● 12 | Preston Road Board | 1922-23 |
| Scarlett | R. A. | Preston | Overland | PE ● 12 | Preston Road Board | 1923-24 |
| Scarlett | R. A. | Preston | Overland | PE ● 12 | Preston Road Board | 1924-25 |
| Scarlett | R. A. | Mumballup | Overland | PE ● 12 | Preston Road Board | 1925-26 |
| Scarlett | R. A. | Mumballup | Chevrolet | PE ● 12 | Preston Road Board | 1926-27 |
| Scarlett | R. A. | Mumballup | Cleveland | PE ● 12 | Preston Road Board | 1927-28 |
| Scarlett Bros | - | Korrelocking | Essex | WM ● 5 | Wyalkatchem Road Board | 1924-25 |
| Scarlett Bros | - | Korrelocking | Essex | WM ● 5 | Wyalkatchem Road Board | 1925-26 |
| Scarlett Bros | - | Korrelocking | Essex | WM ● 5 | Wyalkatchem Road Board | 1926-27 |
| Scarlett Bros | - | Korrelocking | Essex | WM ● 5 | Wyalkatchem Road Board | 1927-28 |
| Scarlett Bros | - | Korrelocking | Chevrolet Truck | WM ● 282 | Wyalkatchem Road Board | 1927-28 |
