| Sutton & O'Neil | - | Bridgetown | Chevrolet Lorry | B ● 100 | Bridgetown Road Board | 1925-26 |
| Sutton & O'Neil | - | Bridgetown | Graham Truck | B ● 162 | Bridgetown Road Board | 1927-28 |
| Svedson | L. H. | South Cunderdin | Ford | ME ● 145 | Meckering Road Board | 1926-27 |
| Svendson | H. | South Cunderdin | Ford | ME ● 145 | Meckering Road Board | 1927-28 |
| Swaby | J. W. | Tunney via Kojonup | Dodge | CB ● 29 | Cranbrook Road Board | 1926-27 |
| Swaby | J. W. | Kojonup | Dodge | KO ● 64 | Kojonup Road Board | 1926-27 |
| Swaby | J. W. | Tunney via Kojonup | Dodge | CB ● 29 | Cranbrook Road Board | 1927-28 |
| Swaddling | H. | 73 Loftus Street, Leederville | Overland | 894 | Metro Private Car | 1926-27 |
| Swadling | H. | 73 Loftus Street, Leederville | Whippet | 14097 | Metro Private Car | 1926-27 |
| Swadling | H. | 122 Carr Street, West Perth | Whippet | 14097 | Metro Private Car | 1927-28 |
| Swain | J. E. H. | Bunbury | Chevrolet | BY 58 | Bunbury Municipality | 1925-26 |
| Swain | J. E. H. | Manjimup | Ford | WA ● 93 | Manjimup Road Board | 1925-26 |
| Swain | J. E. H. | Bunbury | Chevrolet | BY 58 | Bunbury Municipality | 1926-27 |
| Swain | J. E. H. | Bunbury | Chevrolet | BY 58 | Bunbury Municipality | 1927-28 |
| Swain | R. | Kellerberrin | Ford Truck | KE ● 345 | Kellerberrin Road Board | 1927-28 |
| Swaine | F. C. | 69 Chelmsford Road, North Perth | Oakland | 8671 | Metro Private Car | 1925-26 |
| Swaine | F. C. | 69 Chelmsford Road, North Perth | Amil | 9616 | Metro Private Car | 1926-27 |
| Swaine | F. C. | 69 Chelmsford Road, North Perth | Amil | 9616 | Metro Private Car | 1927-28 |
| Swaine | H. L. | 1290 Hay Street | Singer 3½ H.P. Motorcycle | P 680 | Perth Municipality | 1915 |
| Swaine | H. L. | 1290 Hay Street | Singer 3½ H.P. Motorcycle | P 680 | Perth Municipality | 1916 |
| Swaine | H. L. | 1290 Hay Street | Douglas 2¾ H.P. Motorcycle | P 680 | Perth Municipality | 1917-18 |
| Swainson | G. W. | Fraser Street, East Fremantle | Chevrolet | 9226 | Metro Private Car | 1927-28 |
| Swallow | E. | Wittenoom Street, Collie | Oakland | CM 49 | Collie Municipality | 1925-26 |
| Swallow | E. | Wittenoom Street, Collie | Oakland | CM 49 | Collie Municipality | 1926-27 |
| Swallow | E. | Wittenoom Street, Collie | Oakland | CM 49 | Collie Municipality | 1927-28 |
| Swan | L. C. | - | Motorcycle | DN 4 | Dowerin Road Board | 1915 |
| Swan | L. C. | Dowerin | Motor Cycle | D 4 | Dowerin Road Board | 1916 |
| Swan | L. C. | Wyalkatchem | Buick 18 H.P. | D ● 8 | Dowerin Road Board | 1917-18 |
| Swan | L. C. | Wyalcatchem | Buick 18 H.P. | D ● 8 | Dowerin Road Board | 1919 |
| Swan | L. C. | Wyalkatchem | Buick | WM ● 13 | Wyalkatchem Road Board | 1922-23 |
| Swan | L. C. | Wyalkatchem | Overland | WM ● 11 | Wyalkatchem Road Board | 1922-23 |
| Swan | L. P. | - | Ford Charabanc | BE ● 195 | Beverley Road Board | 1924-25 |
| Swan | L. P. | Beverley | Ford Charabanc | BE ● 195 | Beverley Road Board | 1925-26 |
| Swan | L. P. | Beverley | Buick | BE ● 212 | Beverley Road Board | 1925-26 |
| Swan | L. P. | - | Ford | BE ● 195 | Beverley Road Board | 1926-27 |
| Swan | L. P. | - | Chevrolet | BE ● 278 | Beverley Road Board | 1926-27 |
| Swan | L. P. | - | International Truck | BE ● 195 | Beverley Road Board | 1927-28 |
| Swan | Miss P. | 9 Congdon Street, Swanbourne | Dodge | 6280 | Metro Private Car | 1924-25 |
| Swan | Miss P. | 9 Congdon Street, Swanbourne | Dodge | 6280 | Metro Private Car | 1925-26 |
| Swan | Miss P. | 9 Congden Street, Swanbourne | Dodge | 6280 | Metro Private Car | 1926-27 |
| Swan | P. | Richardson Avenue, Swanbourne | Dodge | 6280 | Metro Private Car | 1927-28 |
| Swan Brewer | - | Perth | Halley Wagon | 998 | Metro Private Car | 1923-24 |
| Swan Brewer | - | Perth | Halley Wagon | 999 | Metro Private Car | 1923-24 |
| Swan Brewery | - | Mounts Bay Road | Mann (steam) 4-8 H.P. | P 57 | Perth Municipality | 1915 |
| Swan Brewery | - | Mounts Bay Road | Ford 20 H.P. | P 87 | Perth Municipality | 1915 |
| Swan Brewery | - | Perth | Halley 40 H.P. | P 151 | Perth Municipality | 1915 |
| Swan Brewery | - | Saint George's Terrace | Talbot 15 H.P. | P 293 | Perth Municipality | 1915 |
| Swan Brewery | - | Saint George's Terrace | Halley 34 H.P. | P 396 | Perth Municipality | 1915 |
| Swan Brewery | - | Mounts Bay Road | Mann 4-8 H.P. | P 57 | Perth Municipality | 1916 |
| Swan Brewery | - | Mounts Bay Road | Ford 20 H.P. | P 87 | Perth Municipality | 1916 |
