| Scarlott | W. T. | Nalkain | Essex | WM ● 289 | Wyalkatchem Road Board | 1927-28 |
| Sccombe & Murphy | - | Broome | Ford | BM ● 53 | Broome Road Board | 1927-28 |
| Scerett | A. J. | Bunbury | Chevrolet | By 114 | Bunbury Municipality | 1924-25 |
| Schacht | A. | Palmyra | Motorcycle | MRB 2 | Melville Road Board | 1915 |
| Schacht | A. | Hammad Street, Palmyra | B.S.A. 4¼ H.P. Motorcycle | MV 2 | Melville Road Board | 1919 |
| Schacht | A. C. | Petra Street, Palmyra | Chevrolet | 4572 | Metro Private Car | 1924-25 |
| Schaffner | G. | Albany | Rugby | A 119 | Municipality of Albany | 1926-27 |
| Schaffner | G. | Albany | Chevrolet Truck | A 119 | Albany Municipality | 1927-28 |
| Schaman | Jas. | Mount Ida | Dodge 12-16 H.P. | MN ● 11 | Menzies Road Board | 1917-18 |
| Schaman | Jas. | Mount Ida | Dodge 16 H.P. | MN 11 | Menzies Road Board | 1919 |
| Schank | A. F. | Owen Road, Hamilton Hill | Ford Truck | 15839 | Metro Private Car | 1927-28 |
| Scharf | A. | 13 Murray Street | Clifton Zedel 3½ H.P. Motorcycle | P 766 | Perth Municipality | 1915 |
| Scharf | A. | 25 Gloucester Street, Victoria Park | Ford | 6241 | Metro Private Car | 1924-25 |
| Scharf | A. | 25 Gloster Street, Victoria Park | Ford | 14413 | Metro Private Car | 1927-28 |
| Scharf | P. | Forrest Street, Collie | Reeves 2 ½ H.P. | CM 25 | Collie Municipality | 1919 |
| Scharfe | A. | Forrest Street, Collie | De Dion 3 H.P. Motorcycle | CMC 7 | Collie Municipality | 1915 |
| Scharfe | A. | Forrest Street, Collie | De Dion 3 H.P. | CM 7 | Collie Municipality | 1916 |
| Scharfe | F. A. P. | Collie | Dodge | CM 8 | Collie Municipality | 1927-28 |
| Scharfe Bros | - | Forrest Street | Ford | CM ● 1 | Collie Municipality | 1922-23 |
| Scharfe Bros | - | Forrest Street | Ford | CM ● 2 | Collie Municipality | 1922-23 |
| Scharfe Bros | - | Forrest Street, Collie | Ford | CM 1 | Collie Municipality | 1924-25 |
| Scharfe Bros | - | Forrest Street, Collie | Ford | CM 1 | Collie Municipality | 1925-26 |
| Scharfe Bros. | - | Forrest Street | Ford | CM 1 | Collie Municipality | 1923 - 1924 |
| Scharfe Bros. | - | Forrest Street | Ford | CM 2 | Collie Municipality | 1923 - 1924 |
| Scheele | F. | Hannan Street, Kalgoorlie | Ford | KMC 183 | Kalgoorlie Municipal Council | 1926-27 |
| Scheele | F. | Hannan Street, Kalgoorlie | Ford | KMC 183 | Kalgoorlie Municipal Council | 1927-28 |
| Scheffler | G. | Carnarvon | Dodge | GM ● 48 | Gascoyne-Minilya Road Board | 1924-25 |
| Schell | A. | Goomalling | Dodge 25 H.P. | GO ● 17 | Goomalling Road Board | 1917-18 |
| Schell | A. | Goomalling | Dodge 25 H.P. | GO ● 17 | Goomalling Road Board | 1919 |
| Schell | A. | 40 Queen's Crescent, Mount Lawley | Ford | 5930 | Metro Private Car | 1924-25 |
| Schell | A. | Jennacubbine | Ford | GO ● 17 | Goomalling Road Board | 1924-25 |
| Schell | A. | 40 Queens Crescent, Mount Lawley | Ford | 5930 | Metro Private Car | 1925-26 |
| Schell | A. | Goomalling | Maxwell | GO ● 47 | Goomalling Road Board | 1925-26 |
| Schell | A. | Goomalling | Ford | GO ● 92 | Goomalling Road Board | 1925-26 |
| Schell | A. | Goomalling | Maxwell | GO ● 47 | Goomalling Road Board | 1926-27 |
| Schell | Albert | Goomalling | Ford | GO ● 75 | Goomalling Road Board | 1923-24 |
| Schell | Albert | - | Maxwell | GO ● 168 | Goomalling Road Board | 1926-27 |
| Schell | Albert | - | Maxwell | GO ● 168 | Goomalling Road Board | 1927-28 |
| Schell | Arthur | Goomalling | Ford 20 H.P. | GO 17 | Goomalling Road Board | 1916 |
| Schell | Arthur | Goomalling | Ford 20 H.P. | GO ● 17 | Goomalling Road Board | 1922-23 |
| Schell | Arthur | Goomalling | Ford | GO ● 17 | Goomalling Road Board | 1923-24 |
| Schell | Arthur | - | Ford Truck | GO ● 193 | Goomalling Road Board | 1926-27 |
| Schell | Arthur | - | Ford Truck | GO ● 193 | Goomalling Road Board | 1927-28 |
| Schell | E. A. | Goomalling | Maxwell | GO ● 47 | Goomalling Road Board | 1927-28 |
| Schell | E. A. | Goomalling | Chevrolet Truck | GO ● 221 | Goomalling Road Board | 1927-28 |
| Schell | J. M. | Goomalling | Overland | GO ● 116 | Goomalling Road Board | 1924-25 |
| Schell | J. M. | - | Overland | GO ● 116 | Goomalling Road Board | 1926-27 |
| Schell | J. M. | - | Overland | GO ● 116 | Goomalling Road Board | 1927-28 |
| Schell | Mrs J. M. | Goomalling | Chevrolet | GO ● 253 | Goomalling Road Board | 1927-28 |
| Schenberg | M. | 56 Chatsworth Road, Mount Lawley | Morris-Cowley | 9964 | Metro Private Car | 1926-27 |