| Cottle | S. H. | Kondinin | Ford Truck | KN ● 41 | Kondinin Road Board | 1927-28 |
| Cotton | Dr F. W. | Boyup Brook | Gray | BU ● 54 | Upper Blackwood Road Board | 1926-27 |
| Cotton | Dr F. W. | Boyup Brook | Gray | BU ● 54 | Upper Blackwood Road Board | 1927-28 |
| Cotton | M. C. | 132 Joel Terrace, Mount Lawley | Singer | 7698 | Metro Private Car | 1926-27 |
| Cotton | M. C. | 132 Joel Terrace, Mount Lawley | Singer | 7698 | Metro Private Car | 1927-28 |
| Cotton | Miss B. M. | Suburban Road, South Perth | Ford | 1118 | Metro Private Car | 1927-28 |
| Cotton | Miss Beatrice | Suburban Road, South Perth | Citroen | 1118 | Metro Private Car | 1924-25 |
| Cotton | Miss Beatrice | Suburban Road, South Perth | Citroen | 1118 | Metro Private Car | 1925-26 |
| Cotton | Ms Beatrice | Suburban Road, South Perth | Citroen | 1118 | Metro Private Car | 1926-27 |
| Cotton & MacDermett | - | 42 Waverley Street, Subiaco | Chevrolet | 822 | Metro Private Car | 1927-28 |
| Cotton & McDermott | - | 42 Waverley Street, Subiaco | Ford | 5698 | Metro Private Car | 1926-27 |
| Cottrell | E. W. | Dowerin | Ford 18-8 H.P. | D ● 26 | Dowerin Road Board | 1922-23 |
| Cottrell | E. W. | Dowerin | Ford 18-8 H.P. | D ● 26 | Dowerin Road Board | 1923-24 |
| Cottrell | E. W. | Dowerin | Jewett | D ● 26 | Dowerin Road Board | 1924-25 |
| Cottrell | E. W. | Dowerin | Jewett | D ● 26 | Dowerin Road Board | 1925-26 |
| Cottrell | E. W. | Dowerin | Jewett | D ● 26 | Dowerin Road Board | 1926-27 |
| Cottrell | E. W. | Dowerin | Jewett | D ● 26 | Dowerin Road Board | 1927-28 |
| Cottrell | J. | Benjabbering | Ford 19 H.P. | D ● 7 | Dowerin Road Board | 1922-23 |
| Cottrell | J. | Benjabbering | Ford 19 H.P. | D ● 7 | Dowerin Road Board | 1923-24 |
| Cottrell | J. | Benjabbering | Ford | D ● 7 | Dowerin Road Board | 1924-25 |
| Cottrell | J. | Benjabbering | Cleveland | D ● 7 | Dowerin Road Board | 1925-26 |
| Cottrell | J. | Benjabbering | Cleveland | D ● 7 | Dowerin Road Board | 1926-27 |
| Cottrell | J. | Benjabbering | Cleveland | D ● 7 | Dowerin Road Board | 1927-28 |
| Cottrell | S. S. | Dowerin | Ford | D ● 73 | Dowerin Road Board | 1924-25 |
| Cottrell | S. S. | Koomberkine | Maxwell | D ● 73 | Dowerin Road Board | 1925-26 |
| Cottrell | S. S. | Koomberkine | Maxwell | D ● 73 | Dowerin Road Board | 1926-27 |
| Cottrell | S. S. | Dowerin | Ford Truck | D ● 173 | Dowerin Road Board | 1926-27 |
| Cottrell | S. S. | Koomberkine | Maxwell | D ● 73 | Dowerin Road Board | 1927-28 |
| Cottrell | S. S. | Dowerin | Garford Truck | D ● 173 | Dowerin Road Board | 1927-28 |
| Couch | A. | Boolardy Station | Chevrolet Truck | MU ● 26 | Murchison Road Board | 1925-26 |
| Couch | A. | Boolardy Station | Chevrolet Truck | MU ● 26 | Murchison Road Board | 1926-27 |
| Couch | A. | Boolardy Station | Chevrolet Truck | MU ● 26 | Murchison Road Board | 1927-28 |
| Couch | Dr E. A. | 186 Saint George's Terrace, Perth | Oldsmobile | 271 | Metro Private Car | 1922-23 |
| Couch | Dr J. K. | 1314 Hay Street, Perth | Willys-Knight | 4629 | Metro Private Car | 1924-25 |
| Couch | Dr J. K. | 1314 Hay Street, Perth | Willy Knight | 4629 | Metro Private Car | 1925-26 |
| Couch | Dr J. K. | 1314 Hay Street, Perth | Willys-Knight | 413 | Metro Private Car | 1926-27 |
| Couch | Dr J. R. | 1314 Hay Street, Perth | Nash | 413 | Metro Private Car | 1927-28 |
| Couch | Dr. E. A. | 186 Saint George's Terrace, Perth | Oldsmobile | 271 | Metro Private Car | 1923-24 |
| Couch | J. K. | Glanrogan, William Street | Dodge 20 H.P. | P 271 | Perth Municipality | 1919 |
| Couch | J. Kynaston | 96 Murray Street | Royal Enfield | P 723 | Perth Municipality | 1916 |
| Couche | Dr. | 1305 Hay Street | De Dion 10 H.P. | P 38 | Perth Municipality | 1915 |
| Couche | Dr. J. K. | 1305 Hay Street | Dodge Bros. 25 H.P. | P 38 | Perth Municipality | 1916 |
| Couche Calder & Co | - | Wagin | Ford 20 H.P. | WM 11 | Wagin Municipality | 1915 |
| Couchman | V. J. | Knutsford Street, Swanbourne | Pontiac | 6164 | Metro Private Car | 1927-28 |
| Coughlan | E. | Gosnells | Ford | GS ● 3 | Gosnells Road Board | 1924-25 |
| Coughlan | Edw. | Gosnells | Ford 20 H.P. | GS ● 3 | Gosnells Road Board | 1919 |
| Coughlan | Edward | Gosnells | Ford 20 H.P. | GS ● 3 | Gosnells Road Board | 1917-18 |
| Coughlan | Edward | Gosnells | Ford | GS ● 3 | Gosnells Road Board | 1922-23 |
| Coughlan | Eric | Mornington | Ford | H ● 21 | Harvey Road Board | 1922-23 |
| Coughlan | J. G. | Gosnells | Ford Truck | 8268 | Metro Private Car | 1925-26 |
