| Clark Bros | - | Wedgecarrup | Essex | W ● 73 | Wagin Road Board | 1925-26 |
| Clark Bros | - | Dumbleyung | Chevrolet | DU ● 52 | Dumbleyung Road Board | 1926-27 |
| Clark Bros | - | Wedgecarrup | Essex | W ● 73 | Wagin Road Board | 1926-27 |
| Clark Bros | - | Wedgecarrup | Essex | W ● 73 | Wagin Road Board | 1927-28 |
| Clark Bros | - | Moulyinning | Dodge | DU ● 32 | Dumbleyung Road Board | 1927-28 |
| Clark Bros. | - | Wandering | Ford 20 H.P. | WN 1 | Wandering Road Board | 1915 |
| Clark Bros. | - | Wandering | Ford 20 H.P. | WD 1 | Wandering Road Board | 1916 |
| Clark Bros. | - | Wandering | Ford 20 H.P. | WD ● 1 | Wandering Road Board | 1923-24 |
| Clark Motor Company | - | Perth | International | Y 62 | York Municipality | 1923-24 |
| Clark's Motor Trans | - | 167 Saint George's Terrace, Perth | Trailer | 3561 | Metro Private Car | 1924-25 |
| Clark's Motor Transport | - | 167 Saint George's Terrace, Perth | International Wagon | 3132 | Metro Private Car | 1924-25 |
| Clarke | A. B. | Mount Barker | Dodge | PL ● 53 | Plantagenet Road Board | 1925-26 |
| Clarke | A. B. | Mount Barker | Dodge | PL ● 53 | Plantagenet Road Board | 1926-27 |
| Clarke | A. D. | 920 Hay Street, Perth | Chevrolet | 2863 | Metro Private Car | 1923-24 |
| Clarke | A. D. | 290 Hay Street, Perth | Chevrolet | 2863 | Metro Private Car | 1924-25 |
| Clarke | A. D. | 920 Hay Street, Perth | Chevrolet | 2863 | Metro Private Car | 1925-26 |
| Clarke | A. D. | 920 Hay Street, Perth | Chevrolet | 2863 | Metro Private Car | 1926-27 |
| Clarke | A. E. | Weld Chambers | Swift 7-9 H.P. | P 383 | Perth Municipality | 1916 |
| Clarke | A. E. | 42 Weld Chambers | Swift 7 H.P. Motorcycle | P 383 | Perth Municipality | 1917-18 |
| Clarke | A. E. | 42 Weld Chambers | Swift 7-8 H.P. | P 383 | Perth Municipality | 1919 |
| Clarke | A. E. | 90 Kimberley Street, West Leederville | Swift | 383 | Metro Private Car | 1922-23 |
| Clarke | A. E. | Narra Tarra | Dodge | CU ● 13 | Upper Chapman Road Board | 1922-23 |
| Clarke | A. E. | Narra Tarra | Dodge | CU 13 | Chapman Upper Road Board | 1923 - 1924 |
| Clarke | A. E. | 90 Kimberley Street, West Leederville | Swift | 383 | Metro Private Car | 1923-24 |
| Clarke | A. E. | Port Hedland | Ford | PH ● 22 | Port Hedland Road Board | 1924-25 |
| Clarke | A. E. | Port Hedland | Ford | PH ● 22 | Port Hedland Road Board | 1925-26 |
| Clarke | A. E. | 90 Kimberley Street, West Leederville | Swift | 383 | Metro Private Car | 1926-27 |
| Clarke | A. E. | 13 Rorslyn Street, Leederville | Rover | 14962 | Metro Private Car | 1927-28 |
| Clarke | A. F. T. | Napoleon Street, Cottesloe Beach | Overland | 9710 | Metro Private Car | 1926-27 |
| Clarke | A. F. T. | Napoleon Street, Cottesloe Beach | Overland | 9710 | Metro Private Car | 1927-28 |
| Clarke | A. G. | 39 McCourt Street, Leederville | Swift 7 H.P. | P 383 | Perth Municipality | 1915 |
| Clarke | A. G. | Kondut | Oakland | WB ● 116 | Wongan-Ballidu Road Board | 1927-28 |
| Clarke | A. J | Kondut | Cleveland | WB ● 24 | Wongan-Ballidu Road Board | 1926-27 |
| Clarke | A. T. | Bunbury | Ford Van | BY 64 | Bunbury Municipality | 1927-28 |
| Clarke | Arthur B. | Mount Barker | Dodge | PL ● 53 | Plantagenet Road Board | 1927-28 |
| Clarke | Arthur Benjamin | Mount Barker | Ford | PL ● 53 | Plantagenet Road Board | 1922-23 |
| Clarke | Arthur Benjamin | Mount Barker | Ford | PL ● 53 | Plantagenet Road Board | 1923-24 |
| Clarke | Arthur Benjamin | Mount Barker | Ford | PL ● 53 | Plantagenet Road Board | 1924-25 |
| Clarke | Aubrey | Napoleon Street, Cottesloe | Harley Davidson & Sidecar | 284 | Metro Motorcycle | 1922-23 |
| Clarke | B. B. | Calingiri | Hupmobile 17 H.P. | VP ● 2 | Victoria Plains Road Board | 1917-18 |
| Clarke | Ben. B. | Bolgart | Triumph 4 H.P. | VP 3 | Victoria Plains Road Board | 1916 |
| Clarke | Ben. B. | Calingiri | Triumph 4 H.P. Motorcycle | VP ● 3 | Victoria Plains Road Board | 1917-18 |
| Clarke | C. | Howlett Street, North Perth | Studebaker 20 H.P. | P 199 | Perth Municipality | 1917-18 |
| Clarke | C. | Howlett Street, North Perth | Studebaker 20 H.P. | P 199 | Perth Municipality | 1919 |
| Clarke | C. | Howlett Street, Victoria Park | Studebaker 18-20 H.P. | P 299 | Perth Municipality | 1919 |
| Clarke | C. | - | Essex | MD ● 68 | Merredin Road Board | 1923-24 |
| Clarke | C. | Tammin | Ford | ME ● 291 | Meckering Road Board | 1926-27 |
| Clarke | C. | Tammin | Ford | ME ● 291 | Meckering Road Board | 1927-28 |
| Clarke | C. C. | Bunbury | Jowett | BY 126 | Bunbury Municipality | 1926-27 |
| Clarke | C. C. | Bunbury | Jewett | BY 126 | Bunbury Municipality | 1927-28 |
