| Suburban Estate Ltd | - | Howard Street, Perth | Dodge | 11990 | Metro Private Car | 1927-28 |
| Suburban Estates Ltd | - | 8 Surrey Chambers, Perth | Dodge | 7229 | Metro Private Car | 1925-26 |
| Suburban Estates Ltd | - | Howard St | Dodge | 13062 | Metro Private Car | 1926-27 |
| Suburban Estates Ltd | - | Harpers Bld's. Howard Street, Perth | Dodge | 11625 | Metro Private Car | 1926-27 |
| Suburban Estates Ltd | - | Howard Street | Dodge | 13062 | Metro Private Car | 1927-28 |
| Suburban Estates Ltd | - | Howard Street, Perth | Dodge | 7398 | Metro Private Car | 1927-28 |
| Suckling | C G. | 4 Shenton Road, Claremont | Matchless & Sidecar | 1072 | Metro Motorcycle | 1922-23 |
| Suckling | C. G. | 6 Bay View Terrace, Claremont | Ford Van | 629 | Metro Private Car | 1927-28 |
| Suckling | L. J. | Clifton Street, Collie | Overland | CM 65 | Collie Municipality | 1925-26 |
| Suckling | L. J. | Clifton Street, Collie | Overland | CM 65 | Collie Municipality | 1926-27 |
| Suckling | L. J. | Clifton Street, Collie | Overland | CM 65 | Collie Municipality | 1927-28 |
| Suckling | W. | Northampton | Chevrolet | NR ● 102 | Northampton Road Board | 1925-26 |
| Suckling | W. J. | Northampton | Chevrolet | NR ● 102 | Northampton Road Board | 1926-27 |
| Sudgen | E. | York | Ford | Y ● 66 | York Road Board | 1925-26 |
| Sudgen | E. | York | Ford | Y ● 66 | York Road Board | 1925-26 |
| Sudgen | E. | York | Ford | Y ● 66 | York Road Board | 1926-27 |
| Sudgen | E. | York | Ford | Y ● 66 | York Road Board | 1927-28 |
| Sudholz | F. | Cunderdin | Buick | ME ● 71 | Meckering Road Board | 1923-24 |
| Sudholz | F. | Cunderdin | Buick | ME ● 71 | Meckering Road Board | 1924-25 |
| Sudholz | F. | Cunderdin | Buick | ME ● 71 | Meckering Road Board | 1925-26 |
| Sudholz | F. | Cunderdin | Buick | ME ● 71 | Meckering Road Board | 1926-27 |
| Sudholz | F. | Meckering | Buick | ME ● 71 | Meckering Road Board | 1927-28 |
| Sugars | A. A. | 29 Hopetoun Terrace, West Subiaco | Dodge | 5482 | Metro Private Car | 1927-28 |
| Sugars | B. | Manjimup | Dodge | WA ● 118 | Manjimup Road Board | 1926-27 |
| Sugars | Bert | Northcliffe | Dodge | WA ● 228 | Manjimup Road Board | 1927-28 |
| Sugden | E. | Percy Rd, Claremont | Motorcycle | C 34 | Claremont Municipality | 1917-18 |
| Sugden | E. | Westanna Road, Claremont | - | CL ● 105 | Claremont Road Board | 1919 |
| Sugden | E. | York | Counter Shaft 4¼ H.P. Motorcycle | Y ● 7 | York Road Board | 1922-23 |
| Sugden | E. | York | Ford | Y ● 66 | York Road Board | 1923-24 |
| Sugden | E. | York | Ford | Y ● 66 | York Road Board | 1924-25 |
| Sugden | H. B. | Katanning | Ford Utility | KA ● 322 | Katanning Road Board | 1927-28 |
| Sugg | M. | Kukerin | Ford | DU ● 35 | Dumbleyung Road Board | 1924-25 |
| Sugg | M. | Kukerin | Chevrolet | DU ● 35 | Dumbleyung Road Board | 1925-26 |
| Sugg | M. | Kukerin | Chevrolet | DU ● 35 | Dumbleyung Road Board | 1926-27 |
| Sugg | M. | Kukerin | Chevrolet | DU ● 205 | Dumbleyung Road Board | 1927-28 |
| Sugg Bros | - | East Wagin | Overland | W ● 109 | Wagin Road Board | 1925-26 |
| Sugg Bros | - | East Wagin | Overland | W ● 109 | Wagin Road Board | 1926-27 |
| Sugg Bros | - | East Wagin | Overland | W ● 109 | Wagin Road Board | 1927-28 |
| Suinton | F. | Gap | Chevrolet | NN ● 17 | Nannine Road Board | 1926-27 |
| Suinton | F. | Gap | Chevrolet | NN ● 17 | Nannine Road Board | 1927-28 |
| Sulilvan | R. T. | Dalwallinu | Ford | DL ● 133 | Dalwallinu Road Board | 1927-28 |
| Sullen & O'Neill | - | - | Graham Truck | B ● 162 | Bridgetown Road Board | 1926-27 |
| Sullivan | A. J. | 7 Lichfield Street, Victoria Park | Chrysler | 13798 | Metro Private Car | 1926-27 |
| Sullivan | A. J. P | 7 Leitchfield Street, Victoria Park | Chrysler | 13798 | Metro Private Car | 1927-28 |
| Sullivan | D. | - | Reo Truck | GO ● 115 | Goomalling Road Board | 1926-27 |
| Sullivan | D. | - | Reo Truck | GO ● 157 | Goomalling Road Board | 1926-27 |
| Sullivan | E. A. | Ocean Road, Cottesloe Beach | Scat | 6130 | Metro Private Car | 1926-27 |
| Sullivan | Edmund | 71 Ocean Road, Cottesloe | Durant | 12404 | Metro Private Car | 1927-28 |
| Sullivan | I. M. | Narembeen | Reo Wagon | NB ● 102 | Nareembeen District Road Board | 1926-27 |
| Sullivan | J. | Pantapia | Ford | Q ● 92 | Quairading Road Board | 1925-26 |
