| Rosenthal | C. | Pinjarra | Studebaker | MY ● 46 | Murray Road Board | 1925-26 |
| Rosenthal | C. | Coolup | Overland Truck | MY ● 129 | Murray Road Board | 1926-27 |
| Rosenthal | Charles | Pinjarra | Studebaker | MY ● 46 | Murray Road Board | 1922-23 |
| Rosenthal | Charles | Pinjarra | Studebaker | MY ● 46 | Murray Road Board | 1923-24 |
| Rosenthal | S. | 233 Thomas Street, Subiaco | Chrysler | 14272 | Metro Private Car | 1927-28 |
| Rosenthal Bros | - | Broome | Le Zebre | BM ● 8 | Broome Road Board | 1924-25 |
| Rosenwax | David | 49 Barrack Street | Rudge Whitworth 3½ H.P. Motorcycle | P 143 | Perth Municipality | 1915 |
| Rosenwax | David | View & Parker Streets, North Perth | Rudge-Multi 3½ H.P. Motorcycle | P 740 | Perth Municipality | 1916 |
| Rosewarn | H. | Kelmscott | Chevrolet | A-K ● 34 | Armadale-Kelmscott Road Board | 1924-25 |
| Rosewarne | Harold | Kelmscott | Ford | A-K ● 34 | Armadale-Kelmscott Road Board | 1922-23 |
| Roseworn | Harold | Kelmscott | Chevrolet | A-K ● 34 | Armadale-Kelmscott Road Board | 1923-24 |
| Roshams | W. S. | - | Rugby | CU ● 90 | Upper Chapman Road Board | 1925-26 |
| Roskams | W. S. | - | Rugby | CU ● 90 | Upper Chapman Road Board | 1926-27 |
| Roskams | W. S. | - | Chevrolet Truck | CU ● 119 | Upper Chapman Road Board | 1926-27 |
| Roskams | W. S. | - | Rugby | CU ● 90 | Upper Chapman Road Board | 1927-28 |
| Roskams | W. S. | - | Chevrolet Truck | CU ● 119 | Upper Chapman Road Board | 1927-28 |
| Rosman | E. C. | Fimiston | Hupmobile | K ● 20 | Kalgoorlie Road Board | 1924-25 |
| Rosman | E. C. | Lake View & Star | Austin | K ● 107 | Kalgoorlie Road Board | 1927-28 |
| Rosman | E. H. | 51 Victoria Avenue, Claremont | Ford | 4809 | Metro Private Car | 1923-24 |
| Rosman | E. H. | 51 Victoria Avenue, Claremont | Ford | 4809 | Metro Private Car | 1924-25 |
| Rosman | E. H. | 14a Bernard Street, Claremont | Ford | 4809 | Metro Private Car | 1927-28 |
| Rosman | E. W. | 33 Mount Street, Perth | Cleveland | 8210 | Metro Private Car | 1925-26 |
| Ross | Allan | Kellerberrin | Rover | KE ● 72 | Kellerberrin Road Board | 1926-27 |
| Ross | Charles | C/o Lady Forrest Cottesloe | Rudge Multi | 383 | Metro Motorcycle | 1922-23 |
| Ross | D. | Narrogin | Ford | NGN 1 | Narrogin Municipality | 1925-26 |
| Ross | D. C. | 63 Florence Street, West Perth | Chevrolet | 7475 | Metro Private Car | 1926-27 |
| Ross | D. C. | 63 Florence Street, West Perth | Oakland | 7475 | Metro Private Car | 1927-28 |
| Ross | D. J. | Kelmscott | Bean Wagon | 12607 | Metro Private Car | 1926-27 |
| Ross | D. J. | Kelmscott | Bean Wagon | 12607 | Metro Private Car | 1927-28 |
| Ross | Donald | Narrogin | Ford | NGN 1 | Narrogin Municipality | 1924-25 |
| Ross | E. | 116 Churchill Avenue, Subiaco | Dodge | 11095 | Metro Private Car | 1926-27 |
| Ross | E. | 116 ChurcHill Avenue, Subiaco | Essex | 11095 | Metro Private Car | 1927-28 |
| Ross | E. R. | 10th Avenue Maylands | Rudge 3½ H.P. Motorcycle | P 65 | Perth Municipality | 1916 |
| Ross | F. W. | Frankland River | Reo Wagon | CB ● 75 | Cranbrook Road Board | 1927-28 |
| Ross | G. M. | Nembudding | Rugby | WM ● 118 | Wyalkatchem Road Board | 1925-26 |
| Ross | G. M. | Nembudding | Rugby | WM ● 118 | Wyalkatchem Road Board | 1926-27 |
| Ross | G. M. | Nembudding | Rugby | WM ● 118 | Wyalkatchem Road Board | 1927-28 |
| Ross | H. F. | 12 Grant Street, Cottesloe | Chevrolet | 13745 | Metro Private Car | 1926-27 |
| Ross | H. F. | 12 Grant Street, Cottesloe | Chevrolet | 13745 | Metro Private Car | 1927-28 |
| Ross | H. L. | 79 Bruce Street, Nedlands | Ford | 5926 | Metro Private Car | 1924-25 |
| Ross | H. M. | Broad Arrow | B.S.A. 3½ H.P. Motorcycle | BA 12 | Broad Arrow Road Board | 1915 |
| Ross | H. M. | Broad Arrow | B.S.A. 3½ H.P. Motorcycle | BA 12 | Broad Arrow Road Board | 1916 |
| Ross | H. M. | - | B.S.A. Motorcycle | BA ● 15 | Broad Arrow Road Board | 1917-18 |
| Ross | H. M. | - | B.S.A. | BA ● 15 | Broad Arrow Road Board | 1919 |
| Ross | H. M. | - | B.S.A. Motorcycle | K ● 15 | Kalgoorlie Road Board | 1922-23 |
| Ross | I. C. | Gregory Street | Ford 16 H.P. | GN 23 | Geraldton Municipality | 1919 |
| Ross | J. A. | 11 Byers Road, Midland Junction | Dodge | 8804 | Metro Private Car | 1926-27 |
| Ross | J. A. | 11 Byers Road, Midland Junction | Dodge | 8804 | Metro Private Car | 1927-28 |
| Ross | J. C. | Wilgarrup stn Balbarrup P.O | Ford 20 H.P. | WA ● 1 | Warren Road Board | 1917-18 |
| Ross | J. C. | Wilgarrup Station, Balbarrup P.O. | Ford 20 H.P. | WA ● 1 | Warren Road Board | 1919 |
