| Armstrong's Agency | - | Maritana Street, Kalgoorlie | Studebaker | KMC 21 | Kalgoorlie Municipal Council | 1927-28 |
| Armstrongs Cycle Agency | - | Perth | Studebaker | 6370 | Metro Private Car | 1925-26 |
| Armstrongs Cycle Agency | - | Perth | Studebaker | 6370 | Metro Private Car | 1926-27 |
| Armstrongs Motor Agency | - | Murray Street, Perth | Studebaker | 8486 | Metro Private Car | 1925-26 |
| Arney | A. E. | Waroona | Morris-Oxford | DK ● 59 | Drakesbrook Road Board | 1927-28 |
| Arthur | E. J. | Baandee | Dodge | KE ● 230 | Kellerberrin Road Board | 1926-27 |
| Arthur | E. J. | Baandee | Dodge | KE ● 230 | Kellerberrin Road Board | 1927-28 |
| Arthur | W. | Wubin | Studebaker | DL ● 165 | Dalwallinu Road Board | 1927-28 |
| Ascroft | H. | Warren Road | Buick | KT ● 42 | Kent Road Board | 1926-27 |
| Ascroft | H. | Warren Road | Buick | KT ● 42 | Kent Road Board | 1927-28 |
| Ashton | R. | - | Studebaker | MY ● 6 | Murray Road Board | 1922-23 |
| Askew | T. | Eleanor Street, Geraldton | Ford | GN 41 | Geraldton Municipality | 1924-25 |
| Askew | T. | Eleanor Street, Geraldton | Ford | GN 41 | Geraldton Municipality | 1925-26 |
| Askew | T. | Eleanor Street, Geraldton | Ford | GN 41 | Geraldton Municipality | 1926-27 |
| Askew | T. | Eleanor Street, Geraldton | Overland | GN 24 | Geraldton Municipality | 1927-28 |
| Askew | Thomas | Eleanor Street, Geraldton | Ford | GN ● 41 | Geraldton Municipality | 1923-24 |
| Aslett | A. E. | Duke Street | Overland | N 112 | Northam Municipality | 1924-25 |
| Aslett | A. E. | Duke Street | Maxwell | N 112 | Northam Municipality | 1925-26 |
| Aslett | A. E. | Duke Street, | Maxwell | N 112 | Northam Municipality | 1926-27 |
| Aslett | A. E. | Duke Street | Maxwell | N 112 | Northam Municipality | 1927-28 |
| Astbury | D. T. | Wickepin | Chevrolet | WK ● 237 | Wickepin Road Board | 1927-28 |
| Atchison | T. | Cunderdin | Dodge | ME ● 125 | Meckering Road Board | 1925-26 |
| Atkin | Wm. | 48 Lake Street | Overland 20 H.P. | P 444 | Perth Municipality | 1917-18 |
| Atkin | Wm. | 48 Lake Street | Overland 20 H.P. | P 444 | Perth Municipality | 1919 |
| Atkins | L. F. | Lake Street | Ford 20 H.P. | P 203 | Perth Municipality | 1915 |
| Atkins | L. F. | 48 Lake Street | Ford 20 H.P. | P 203 | Perth Municipality | 1916 |
| Atkins | W. | 48 Lake Street | Overland 12-15 H.P. | P 444 | Perth Municipality | 1916 |
| Atkinson | C. | 55 Ruby Street, North Perth | Studebaker | 2875 | Metro Private Car | 1926-27 |
| Atkinson | Charles | 55 Ruby Street, North Perth | Studebaker | 2875 | Metro Private Car | 1927-28 |
| Atkinson | Sydney | 7 King's Park Avenue, Crawley | Studebaker | 14693 | Metro Private Car | 1927-28 |
| Atkinson | W. J. | Totadjin | Studebaker | MD ● 57 | Merredin Road Board | 1924-25 |
| Atkinson | W. J. | Totadjin | Studebaker | MD ● 57 | Merredin Road Board | 1926-27 |
| Atkinsons | W. J. | Totadjin | Studebaker | MD ● 57 | Merredin Road Board | 1925-26 |
| Attle | C. F. | 101 Market Street, Fremantle | Ford Truck | 11503 | Metro Private Car | 1926-27 |
| Aust. Glass Manufacturing | - | Kensington Street, East Perth | Oldsmobile | 2567 | Metro Private Car | 1927-28 |
| Aust. Workers Union | - | 40 Stirling Street, Perth | Ford | 2553 | Metro Private Car | 1927-28 |
| Aust. Wroker Union | - | Marine Terrace, | Triumph 4 H.P. Motorcycle | GN 25 | Geraldton Municipality | 1922-23 |
| Austen | W. | Waroona | Chevrolet | DK ● 29 | Drakesbrook Road Board | 1926-27 |
| Austey | B. | - | Studebaker | P ● 58 | Perth Road Board | 1919 |
| Austral Motor Co | - | Hay Street, Perth | Rickenbacker | 9060 | Metro Private Car | 1925-26 |
| Australian Worker's Union | - | Geraldton | Ford | GN 61 | Geraldton Municipality | 1924-25 |
| Australian Workers Union | - | Burt Street, Boulder | Ford | B 24 | Boulder Municipality | 1922-23 |
| Australian Workers Union | - | Marine Terrace, Geraldton | Ford | GN ● 61 | Geraldton Municipality | 1923-24 |
| Australian Workers Union | - | Meekatharra | Ford | MK ● 72 | Meekatharra Road Board | 1927-28 |
| Australian Workers' Union | - | Burt Street, Boulder | Ford | B 24 | Boulder Municipality | 1923-24 |
| Australian Workers' Union | - | Geraldton | Dodge | GN 61 | Geraldton Municipality | 1927-28 |
| Ayliffe & Sons | - | Dumbleyung | Studebaker | DU ● 23 | Dumbleyung Road Board | 1924-25 |
| Ayliffe & Sons | - | Dumbleyung | Studebaker | DU ● 23 | Dumbleyung Road Board | 1925-26 |
| Ayliffe & Sons | - | Dumbleyung | Studebaker | DU ● 23 | Dumbleyung Road Board | 1926-27 |
| Ayliffe & Sons | - | Dumbleyung | Studebaker | DU ● 23 | Dumbleyung Road Board | 1927-28 |
