| Roberts Bros | - | Moora | Chevrolet Truck | M ● 214 | Moora Road Board | 1927-28 |
| Roberts Tyre Works | - | 397 Hay Street, Perth | Triumph | 317 | Metro Motorcycle | 1922-23 |
| Robertson | - | 305 Wellington Street | Dealers | 20069 | Metro Dealers Car | 1926-27 |
| Robertson | A. | 29 Ragian Road, North Perth | Essex | 11768 | Metro Private Car | 1926-27 |
| Robertson | A. | 29 Raglan Road, North Perth | Essex | 11768 | Metro Private Car | 1927-28 |
| Robertson | A. D. | Federation Street, Mount Hawthorn | Chevrolet Truck | 4974 | Metro Private Car | 1927-28 |
| Robertson | A. J. | Kelmscott | Chevrolet Wagon | 6884 | Metro Private Car | 1926-27 |
| Robertson | C. | Carnamah | Chevrolet | CA ● 96 | Carnamah Road Board | 1926-27 |
| Robertson | C. | Carnamah | Chevrolet | CA ● 96 | Carnamah Road Board | 1927-28 |
| Robertson | C. | Carnamah | Chrysler | CA ● 254 | Carnamah Road Board | 1927-28 |
| Robertson | C. B. | Katanning | Triumph | KA 8 | Katanning Road Board | 1916 |
| Robertson | C. B. | Katanning | Triumph Motorcycle | KA ● 8 | Katanning Road Board | 1917-18 |
| Robertson | C. B. | Katanning | Triumph | KA 8 | Katanning Road Board | 1919 |
| Robertson | C. B. | Katanning | Ford | KA ● 14 | Katanning Road Board | 1926-27 |
| Robertson | C. B. | Katanning | Ford | KA ● 14 | Katanning Road Board | 1927-28 |
| Robertson | D. | Worsley | Ford | H ● 174 | Harvey Road Board | 1927-28 |
| Robertson | Dr L. J. | 322 Hay Street, Subiaco | Whippet | 9389 | Metro Private Car | 1926-27 |
| Robertson | Dr L. J. | 322 Hay Street, Subiaco | Whippet | 9389 | Metro Private Car | 1927-28 |
| Robertson | Dr. L. | 322 Hay Street | Car | S 53 | Subiaco Municipality | 1916 |
| Robertson | Dr. L. | Hay Street | - | S 53 | Subiaco Municipality | 1919 |
| Robertson | E. W. | Lawlers | Overland | LA ● 31 | Lawlers Road Board | 1927-28 |
| Robertson | Edith | 88 Seventh Avenue, Maylands | Chevrolet | 5496 | Metro Private Car | 1927-28 |
| Robertson | F. L. | 200 Saint George's Terrace | Hupmobile | 2387 | Metro Private Car | 1922-23 |
| Robertson | F. L. | 3 Esplanade Mansions, Perth | Hupmobile | 2387 | Metro Private Car | 1923-24 |
| Robertson | Frank | 2 Darley Street, South Perth | Pontiac | 826 | Metro Private Car | 1927-28 |
| Robertson | G. | Darlot | Ford | LA ● 15 | Lawlers Road Board | 1926-27 |
| Robertson | G. | Darlot | Buick | LA ● 21 | Lawlers Road Board | 1926-27 |
| Robertson | G. | Darlot | Ford | LA ● 15 | Lawlers Road Board | 1927-28 |
| Robertson | G. | Darlot | Buick | LA ● 21 | Lawlers Road Board | 1927-28 |
| Robertson | G. N. | Darlot | Dodge | LA ● 22 | Lawlers Road Board | 1927-28 |
| Robertson | G. N. | Darlot | Reo Truck | LA ● 23 | Lawlers Road Board | 1927-28 |
| Robertson | H. | Corrigin | Ford Truck | CR ● 180 | Corrigin Road Board | 1927-28 |
| Robertson | H. A. | 29 Raglan Road, North Perth | Chevrolet | 8478 | Metro Private Car | 1925-26 |
| Robertson | H. J. | 52 Kimberley Street, West L'ville | Overland | 5086 | Metro Private Car | 1927-28 |
| Robertson | J. | Katanning | Ford | KA ● 87 | Katanning Road Board | 1924-25 |
| Robertson | J. | Katanning | Oldsmobile | KA ● 87 | Katanning Road Board | 1925-26 |
| Robertson | J. | Katanning | Oldsmobile | KA ● 87 | Katanning Road Board | 1926-27 |
| Robertson | J. | Katanning | Oldsmobile | KA ● 87 | Katanning Road Board | 1927-28 |
| Robertson | J. F. | Menzies | Buick | MN ● 18 | Menzies Road Board | 1924-25 |
| Robertson | J. F. | Menzies | Buick | MN ● 18 | Menzies Road Board | 1925-26 |
| Robertson | John F. | Menzies | Buick | MN ● 7 | Menzies Road Board | 1923-24 |
| Robertson | Joseph | Katanning | Ford 19 H.P. | KA ● 87 | Katanning Toad Board | 1922-23 |
| Robertson | Joseph | Katanning | Ford 19 H.P. | KA ● 87 | Katanning Road Board | 1923-24 |
| Robertson | L. | 322 Hay Street, Subiaco | Ford | 453 | Metro Private Car | 1922-23 |
| Robertson | L. J. | 322 Hay Street, Subiaco | Ford | 453 | Metro Private Car | 1923-24 |
| Robertson | L. J. | 322 Hay Street, Subiaco | Ford | 453 | Metro Private Car | 1924-25 |
| Robertson | L. J. | 322 Hay Street, Subiaco | Ford | 453 | Metro Private Car | 1925-26 |
| Robertson | Mrs G. | 1304 Hay Street | Dodge 20 H.P. | P 359 | Perth Municipality | 1917-18 |
| Robertson | Mrs G. | 1304 Hay Street | Dodge 20 H.P. | P 360 | Perth Municipality | 1919 |
| Robertson | Mrs Geo. | 1304 Hay Street, West Perth | Dodge Bros. 24 H.P. | P 359 | Perth Municipality | 1916 |
