| Siverle | A. J. | C/o Gollen & Co. King Street | Austin | 6587 | Metro Private Car | 1924-25 |
| Sivewright | W. A. | York Road, Greenmount | Gray | 2014 | Metro Private Car | 1924-25 |
| Sivewright | W. A. | York Road, Greenmount | Gray | 2014 | Metro Private Car | 1925-26 |
| Sivewright | W. A. | Greenmount | Gray | 2014 | Metro Private Car | 1926-27 |
| Sivewright | W. A. | York Road, Greenmount | Gray | 2014 | Metro Private Car | 1927-28 |
| Sivewright | Wm. A. | York Road, Greenmount | Ford | 525 | Metro Private Car | 1923-24 |
| Sivewright Bros | - | Geraldton | Oderland | G ● 26 | Geraldton Road Board | 1927-28 |
| Sivirle | A. J. | C/o Gollin & Co, King Street, Perth | Austin | 6588 | Metro Private Car | 1925-26 |
| Sizer | J. T. | Duke Street | Ford | N 108 | Northam Municipality | 1924-25 |
| Sizer | J. T. | Lockyer Avenue | Chevrolet | N 108 | Northam Municipality | 1925-26 |
| Sizer | J. T. | Lockyer ave | Chevrolet | N 108 | Northam Municipality | 1926-27 |
| Sizer | J. T. | Lockyer Avenue | Chevrolet | N 108 | Northam Municipality | 1927-28 |
| Sizer | R. | Coorow | Chevrolet Truck | CA ● 202 | Carnamah Road Board | 1927-28 |
| Sizmur | G. | Ballidu | Graham Truck | WB ● 165 | Wongan-Ballidu Road Board | 1926-27 |
| Sizmur | G. | Ballidu | Graham Truck | WB ● 165 | Wongan-Ballidu Road Board | 1927-28 |
| Sizmur | Geo. | Wongan Hills | Dodge | WB ● 13 | Wongan-Ballidu Road Board | 1926-27 |
| Sizmur | Geo. | Ballidu | Dodge | WB ● 13 | Wongan-Ballidu Road Board | 1927-28 |
| Skattery | D. | Ferguson | Ford Lorry | DA ● 53 | Dardanup Road Board | 1927-28 |
| Skeels | H. L. | 30 Tenth Avenue, Maylands | Overland | 4247 | Metro Private Car | 1924-25 |
| Skeels | H. L. | 30 Tenth Avenue, Maylands | Hupmobile | 2410 | Metro Private Car | 1925-26 |
| Skeels | R. F. | 62 Peninsula Road, Maylands | Chevrolet | 9627 | Metro Private Car | 1926-27 |
| Skeels | R. F. | 62 Peninsula Road, Maylands | Chevrolet | 9627 | Metro Private Car | 1927-28 |
| Skeels | W. | 3 Kennedy Street, Maylands | Overland | 696 | Metro Private Car | 1924-25 |
| Skeels | W. F. | 3 Kennedy Street, Maylands | Overland | 7809 | Metro Private Car | 1926-27 |
| Skeels | W. F. | 3 Kennedy Street, Maylands | Overland | 7809 | Metro Private Car | 1927-28 |
| Skeggs | H. J. | Darkan | Commerce Truck | AW ● 81 | West Arthur Road Board | 1927-28 |
| Skellett | W. | Busselton | Ford Truck | BN 62 | Municipality of Busselton | 1925-26 |
| Skellett | W. | Busselton | Ford Truck | BN 62 | Municipality of Busselton | 1926-27 |
| Skellett | W. | Busselton | Ford Truck | BN 62 | Municipality of Busselton | 1927-28 |
| Skelton | G. | 7 Gladstone Street, East Perth | Douglas | 104 | Metro Motorcycle | 1922-23 |
| Skelton | G. T. | 91 Grosvenor Road, North Perth | Citroen | 7691 | Metro Private Car | 1925-26 |
| Skelton | G. T. | 91 Grosvenor Road, North Perth | Citroen | 7691 | Metro Private Car | 1926-27 |
| Skepper | A. L. | 187 Burt Street, Boulder | Chevrolet | B 37 | Boulder Municipality | 1925-26 |
| Skepper | A. L. | 187 Burt Street, boulder | Chevrolet | B37 | Boulder Municipality | 1925-26 |
| Sketchley | J. D. | 50 Mabel Street, Perth | Indian & Sidecar | 1053 | Metro Motorcycle | 1922-23 |
| Sketchley | J. D. | 38 Short Street, Perth | Ford | 511 | Metro Private Car | 1923-24 |
| Sketchley | J. D. | 38 Short Street, Perth | Ford | 511 | Metro Private Car | 1924-25 |
| Sketchley | J. D. | 309 Wellington Street, Perth | Chevrolet Wagon | 5109 | Metro Private Car | 1927-28 |
| Sketchley | L. V. Miss | 108 Pier Street, Perth | Overland | 2566 | Metro Private Car | 1923-24 |
| Sketchley | Miss L. V. | 108 Pier Street, Perth | Overland | 2566 | Metro Private Car | 1924-25 |
| Sketchley | Miss V. M. | 38 Short Street, Perth | Essex | 2566 | Metro Private Car | 1925-26 |
| Sketchley | Mrs A. | 38 Short Street, Perth | Ford | 1462 | Metro Private Car | 1923-24 |
| Sketchley | Violet | 35 Short Street, Perth | Oldsmobile | 2566 | Metro Private Car | 1927-28 |
| Sketchly | Mrs A | 38 Short Street, Perth | Ford | 1462 | Metro Private Car | 1922-23 |
| Skewes | H. H. | Murray Street | Studebaker 20 H.P. | P 940 | Perth Municipality | 1919 |
| Skewes | J. F. | Pantapin | Ford | Q ● 225 | Quairading Road Board | 1926-27 |
| Skewes | N. L. | Armadale | Ford Truck | A-K ● 39 | Armadale-Kelmscott Road Board | 1923-24 |
| Skewes | N. L. | Armadale | Ford Truck | A-K ● 39 | Armadale-Kelmscott Road Board | 1924-25 |
| Skewes | N. L. | Armadale | Ford Truck | A-K ● 39 | Armadale-Kelmscott Road Board | 1925-26 |
| Skewes | W. | Bunbury | Ford 20 H.P. | By 22 | Bunbury Municipality | 1917-18 |
