| Cousins | G. | Wagin | Citroen Truck | WN 74 | Wagin Municipality | 1926-27 |
| Cousins | G. | Bejoording, Toodyay | Hupmobile | T ● 95 | Toodyay Road Board | 1926-27 |
| Cousins | G. | Bejoording, Toodyay | Hupmobile | T ● 95 | Toodyay Road Board | 1927-28 |
| Cousins | G. | Wagin | Citroen Truck | WN 74 | Wagin Municipality | 1927-28 |
| Cousins | H. | Pithara | Hupmobille | DL ● 8 | Dalwallinu Road Board | 1924-25 |
| Cousins | H. | Pithara | Hupmobile | DL ● 8 | Dalwallinu Road Board | 1925-26 |
| Cousins | H. | Pithara | Hupmobile | DL ● 8 | Dalwallinu Road Board | 1926-27 |
| Cousins | H. | Pithara | Chrysler | DL ● 8 | Dalwallinu Road Board | 1927-28 |
| Cousins | Henry | Pithara | Ford | DL ● 8 | Dalwallinu Road Board | 1922-23 |
| Cousins | Henry | Pithara | Ford | DL ● 8 | Dalwallinu Road Board | 1923-24 |
| Cousins | I. R. | Winchester | Dodge | CA ● 49 | Carnamah Road Board | 1925-26 |
| Cousins | I. R. | Winchester | Chrysler | CA ● 49 | Carnamah Road Board | 1926-27 |
| Cousins | I. R. | Winchester | Buick | CA ● 49 | Carnamah Road Board | 1927-28 |
| Cousins | I. R. | Winchester | Chevrolet Truck | CA ● 228 | Carnamah Road Board | 1927-28 |
| Cousins | R. J. | Calcara | Ford | VP ● 2 | Victoria Plains Road Board | 1922-23 |
| Cousins | R. J. | Calcara | Ford | VP ● 2 | Victoria Plains Road Board | 1923-24 |
| Cousins | R. J. | Calcarra | Dodge | VP ● 2 | Victoria Plains Road Board | 1925-26 |
| Cousins | R. J. | Calcarra | Dodge | VP ● 2 | Victoria Plains Road Board | 1926-27 |
| Cousins | R. J. | Calcarra | Dodge | VP ● 2 | Victoria Plains Road Board | 1927-28 |
| Cousins | W. | Bejoording, Toodyay | Overland 25 H.P. | T ● 13 | Toodyay Road Board | 1917-18 |
| Cousins | W. | Bejoording, Toodyay | Overland 25 H.P. | T ● 13 | Toodyay Road Board | 1919 |
| Cousins | W. | Bejooding, Toodyay | Overland 25 H.P. | T ● 13 | Toodyay Road Board | 1922-23 |
| Cousins | W. | Toodyay | Ford | T ● 18 | Toodyay Road Board | 1923-24 |
| Cousins & Son | - | Toodyay | Dodge | T ● 13 | Toodyay Road Board | 1923-24 |
| Cousins & Sons | - | Wattening | Dodge | T ● 13 | Toodyay Road Board | 1925-26 |
| Cousins & Sons | - | Wattening | d | T ● 18 | Toodyay Road Board | 1925-26 |
| Cousins & Sons | - | Wattening | Dodge | T ● 13 | Toodyay Road Board | 1926-27 |
| Cousins & Sons | - | Wattening | Dodge | T ● 18 | Toodyay Road Board | 1926-27 |
| Cousins & Sons | - | Toodyay | Rugby | T ● 13 | Toodyay Road Board | 1927-28 |
| Cousins & Sons | - | Wattoning | Dodge | T ● 18 | Toodyay Road Board | 1927-28 |
| Coutor | T. A. | 112 Churchill Avenue, Subiaco | Royal Ruby | 879 | Metro Motorcycle | 1922-23 |
| Coutts | A. | 42 Mounts Bay Road, Perth | International | 3365 | Metro Hire or Trade | 1926-27 |
| Coutts | Colin | 22 Adelaide Terrace, Perth | Halley Wagon | 3618 | Metro Hire or Trade | 1927-28 |
| Coutts | Colin | 22 Adelaide Terrace, Perth | Clydesdaue Wagon | 10760 | Metro Hire or Trade | 1927-28 |
| Coutts | R. | Donnybrook | Ford Truck | PE ● 123 | Preston Road Board | 1926-27 |
| Coutts | R. | Donnybrook | Ford Truck | PE ● 123 | Preston Road Board | 1927-28 |
| Couzner | V. W. | Belka | Buick | MD ● 309 | Merredin Road Board | 1927-28 |
| Cova | D. | Narembeen | Chevrolet | NB ● 107 | Narembeen Road Board | 1927-28 |
| Cova | J. | Narembeen | Reo Wagon | NB ● 153 | Narembeen Road Board | 1927-28 |
| Cove | A. L. | 315 Stirling Street, Perth | Pontiac | 14906 | Metro Private Car | 1927-28 |
| Cove | Mrs I. | 199 Bagot Road, Subica | Rugby | 7579 | Metro Private Car | 1927-28 |
| Cove | R. A. | 199 Bagot Road, Subiaco | Ford Wagon | 3507 | Metro Private Car | 1924-25 |
| Cove | R. A. | 199 Bagot Road,Subiaco | Ruggies Wagon | 3507 | Metro Hire or Trade | 1925-26 |
| Cove | R. A. | 199 Bagot Road, Subiaco | Ruggles | 10184 | Metro Hire or Trade | 1926-27 |
| Cove | R. A. | 199 Bagot Road, Subiaco | Ruggles | 10184 | Metro Hire or Trade | 1927-28 |
| Coventry Motors | - | Perth | Morris Oxford | 2420 | Metro Private Car | 1927-28 |
| Coventry Motors Ltd | - | Hay Street, Perth | Dealers | 20256 | Metro Dealers Car | 1927-28 |
| Coventry Motors Ltd | - | Hay Street, Perth | Dealers | 20276 | Metro Dealers Car | 1927-28 |
| Coventry Motors Ltd | - | Hay Street, Perth | Morris Cowley | 5449 | Metro Private Car | 1927-28 |
| Coventry Motors Ltd | - | Hay Street, Perth | Morris-Oxford | 5862 | Metro Private Car | 1927-28 |
