| Sweetman | H. J. W. | Arrino | Oakland | MI ● 111 | Mingenew Road Board | 1927-28 |
| Sweetman | H. W. | Arrino | Overland | MI ● 26 | Mingenew Road Board | 1925-26 |
| Sweetman | I. | Oakover Street, East Fremantle | International Wagon | 10426 | Metro Hire or Trade | 1927-28 |
| Sweetman | W B. | Arrino | Overland | MI ● 11 | Mingenew Road Board | 1925-26 |
| Sweetman | W. B. | Arrino | Ford | MI ● 3 | Mingenew Road Board | 1922-23 |
| Sweetman | W. B. | Arrino | Ford | MI 3 | Mingenew Road Board | 1923-24 |
| Sweetman | W. B. | Arrino | Overland | MI ● 11 | Mingenew Road Board | 1924-25 |
| Sweetman | W. B. | Arrino | Overland | MI ● 11 | Mingenew Road Board | 1926-27 |
| Sweetman | W. B. | Arrino | Overland | MI ● 11 | Mingenew Road Board | 1927-28 |
| Sweetman & Beresford | - | Oakover Street, East Fremantle | Ford | 3842 | Metro Hire or Trade | 1925-26 |
| Swell | W. V. | Sandspring | Ford 20 H.P. | G 1 | Geraldton Road Board | 1916 |
| Swift | C. | 234 Brisbane Street | Imperial 2½ H.P. Motorcycle | P 701 | Perth Municipality | 1917-18 |
| Swift | C. | 196 Lake Street | B.S.A. 4 H.P. | P 1188 | Perth Municipality | 1919 |
| Swift | Cecil | 196 Lake Street | Rudge 4 H.P. | P 744 | Perth Municipality | 1916 |
| Swift | Mrs I. E. | Kondut | Ford Truck | WB ● 142 | Wongan-Ballidu Road Board | 1927-28 |
| Swift | S. | Coombe Street, Collie | Ford | CM 105 | Collie Municipality | 1925-26 |
| Swift | S. | Coombe Street, Collie | Ford | CM 105 | Collie Municipality | 1926-27 |
| Swift | S. | Coombe Street, Collie | Ford | CM 105 | Collie Municipality | 1927-28 |
| Swinbank | W. M. | Wickepin | Chevrolet Truck | WK ● 22 | Wickepin Road Board | 1925-26 |
| Swinbourn | Wm. | Barker Street, Bassendean | Ford | 1223 | Metro Private Car | 1923-24 |
| Swinbourne | . | Parker Street, Bassendean | Ford | 1223 | Metro Private Car | 1926-27 |
| Swinbourne | J. | Wooroloo | Dodge | N ● 26 | Northam Road Board | 1922-23 |
| Swinbourne | J. | Wooroloo | Dodge | N ● 26 | Northam Road Board | 1923-24 |
| Swinbourne | J. M. | Wooroloo | Buick | GE ● 23 | Greenmount Road Board | 1922-23 |
| Swinbourne | J. M. | Wooroloo | Buick | GE ● 23 | Greenmount Road Board | 1923-24 |
| Swinbourne | J. M. | Wooroloo | Dodge | GE ● 21 | Greenmount Road Board | 1924-25 |
| Swinbourne | J. M. | Wooroloo | Dodge | GE ● 21 | Greenmount Road Board | 1925-26 |
| Swinbourne | W. A. | Parker Street, Bassendean | Buick | 1245 | Metro Private Car | 1927-28 |
| Swinbourne | Wm. | Parker Street, Bassendean | Ford | 1223 | Metro Private Car | 1925-26 |
| Swinbourne | Wm. | Parker Street, Bassendean | Ford | 1223 | Metro Private Car | 1927-28 |
| Swinburn | Wm. | Parker Street, Bassendean | Ford | 1223 | Metro Private Car | 1924-25 |
| Swinburne | T. | Denmark | Chevrolet | DE ● 41 | Denmak Road Board | 1926-27 |
| Swinburne | T. | Denmark | Chevrolet Truck | DE ● 41 | Denmark Road Board | 1927-28 |
| Swincer | W. | Pithara | Fiat | DL ● 101 | Dalwallinu Road Board | 1925-26 |
| Swincer | W. | Pithara | Fiat | DL ● 101 | Dalwallinu Road Board | 1926-27 |
| Swincer | W. | Pithara | Fiat | DL ● 101 | Dalwallinu Road Board | 1927-28 |
| Swindell | A. E. | Holyoake | Ford | MY ● 92 | Murray Road Board | 1924-25 |
| Swindell | A. E. | Holyoake | Ford | MY ● 92 | Murray Road Board | 1925-26 |
| Swindell | N. | Nangeenan | Ford | MD ● 154 | Merredin Road Board | 1925-26 |
| Swindell | N. | Nangeenan | Ford | MD ● 154 | Merredin Road Board | 1926-27 |
| Swindell | N. | Nangeenan | Citroen | MD ● 154 | Merredin Road Board | 1927-28 |
| Swindill | A. E. | Dwellingup | Chevrolet | MY ● 149 | Murray Road Board | 1926-27 |
| Swiney | G. F. | Denninup Vale, Upper Blackwood | Ford 20 H.P. | KPRB 2 | Kojonup Road Board | 1915 |
| Swiney | G. F. | Upper Blackwood | Ford 20 H.P. | KO 2 | Kojonup Road Board | 1916 |
| Swiney | G. F. | Kirup | Ford 20 H.P. | BN ● 3 | Balingup Road Board | 1917-18 |
| Swiney | G. F. | Frankland Cran | Grey Truck | PL ● 4 | Plantagenet Road Board | 1924-25 |
| Swiney | G. F. | Franklands Cran. | Gray Truck | PL ● 4 | Plantagenet Road Board | 1925-26 |
| Swiney | G. F. A. | Upper Blackwood | Ford 15-20 H.P. | BU ● 2 | Blackwood (Upper) Road Board | 1919 |
| Swiney | G. F. A. | Upper Blackwood | Buick | BU ● 2 | Upper Blackwood Road Board | 1922-23 |
| Swiney | G. F. A. | Franklands, Cranbrook | Buick | PL ● 38 | Plantagenet Road Board | 1924-25 |
