| Rosenthal | Charles | Pinjarra | Studebaker | MY ● 46 | Murray Road Board | 1923-24 |
| 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 |
| Rosman | E. C. | Lake View & Star | Austin | K ● 107 | Kalgoorlie Road Board | 1927-28 |
| Ross | Allan | Kellerberrin | Rover | KE ● 72 | Kellerberrin Road Board | 1926-27 |
| 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 | J. D. | River Road, Kelmscott | Ford Wagon | 3891 | Metro Hire or Trade | 1924-25 |
| Ross | W. | Kwobrup | Ford | KT ● 22 | Kent Road Board | 1924-25 |
| Ross | W. | Kwobrup | Ford | KT ● 22 | Kent Road Board | 1925-26 |
| Ross | W. | Kwobrup | Ford | KT ● 22 | Kent Road Board | 1926-27 |
| Rossman Lake View & Star | E. C. | - | Austin | K ● 107 | Kalgoorlie Road Board | 1925-26 |
| Rothery | F. T. | 184 Barker Road, Subiaco | Chevrolet | 5364 | Metro Private Car | 1927-28 |
| Rothery | T. R. | 184 Barker Road, Subiaco | Essex | 13593 | Metro Private Car | 1926-27 |
| Rourke | Harry | Tambellup | Ford 20 H.P. | TA ● 6 | Tambellup Road Board | 1917-18 |
| Rourke | Harry | Tambellup | Ford 20 H.P. | TA ● 6 | Tambellup Road Board | 1919 |
| Rourke | W. | Throssell Street, Collie | Rugby | CM 1 | Collie Municipality | 1926-27 |
| Rourke | W. H. | Pemberton | Rugby | WA ● 264 | Manjimup Road Board | 1927-28 |
| Rourke | Wm. | 28 Walcott Street, Mount Lawley | Indian | 1166 | Metro Motorcycle | 1922-23 |
| Rowcliff | F. | Broomehill | Studebaker 26 H.P. | BH 10 | Broomhill Road Board | 1923 - 1924 |
| Rowcliffe | F. | Broomehill | Studebaker | BH ● 10 | Broomehill Road Board | 1924-25 |
| Rowe | A. L. W. | Pithara | Studebaker | DL ● 113 | Dalwallinu Road Board | 1925-26 |
| Rowe | R. | Lake Street, Trafalgar | De Dion 8-12 H.P. | K ● 4 | Kalgoorlie Road Board | 1922-23 |
| Rowe | R. | Lake Street Trafalgar | De Dion 8-12 H.P. | K ● 4 | Kalgoorlie Road Board | 1923-24 |
| Rowe & Zinnecker | - | Bridgetown | Gray | B ● 114 | Bridgetown Road Board | 1926-27 |
| Rowe & Zinnecker | - | Bridgetown | Gray | B ● 114 | Bridgetown Road Board | 1927-28 |
| Rowe & Zinnecker | - | Bridgetown | Pontiac | B ● 191 | Bridgetown Road Board | 1927-28 |
| Rowe & Zinnecker | - | Bridgetown | Buick | B ● 73 | Bridgetown Road Board | 1927-28 |
| Rowe and Zennicker | - | Bridgetown | Buick | B ● 56 | Bridgetown Road Board | 1923-24 |
| Roweliff | F. | Broomehill | Studebaker 26 H.P. for Trade or Hire | BH ● 10 | Broomehill Road Board | 1922-23 |
| Rowes | J. | Cue | Studebaker | CD ● 2 | Cue-Day Dawn Road Board | 1924-25 |
| Rowett | W. L. | Baandee | Chevrolet | KE ● 327 | Kellerberrin Road Board | 1927-28 |
| Rowland | J. | Burngup | Graham Truck | LG ● 143 | Lake Grace Road Board | 1927-28 |
| Rowland | W. T. | Dongara | Studebaker | IR ● 15 | Irwin Road Board | 1925-26 |
| Rowles | H. N. | Cunderdin | Ford Truck | ME ● 224 | Meckering Road Board | 1926-27 |
| Rowles | H. N. | Cunderdin | Ford Truck | ME ● 224 | Meckering Road Board | 1927-28 |
| Rowling | H. J. | Baandee | Ford 19 H.P. | KE ● 37 | Kellerberrin Road Board | 1922-23 |
| Rowtcliff | F. W. | Broomehill | Studebaker | BH ● 10 | Broomehill Road Board | 1926-27 |
| Rowtcliff | F. W. | Broomehill | Studebaker | BH ● 10 | Broomehill Road Board | 1927-28 |
| Rowtcliffe | F. W. | Broomehill | Studebaker | BH ● 10 | Broomehill Road Board | 1925-26 |
| Ruake | T. | Northam | Dodge | N ● 50 | Northam Road Board | 1926-27 |
| Ruediger | P. H. | Northam | Studebaker | N ● 103 | Northam Road Board | 1926-27 |
| Rule | J. H. | Stoke Street, South Fremantle | Chevrolet Wagon | 12459 | Metro Private Car | 1927-28 |
| Rumberg | J. E. | 330 Rokeby Road, Subiaco | Morris-Cowley | 7322 | Metro Private Car | 1925-26 |
| Rumberg | J. E. | 330 Rokeby Road, Subiaco | Morris-Cowley | 7322 | Metro Private Car | 1926-27 |
| Rumberg | J. E. | 330 Rockeby Road, Subiaco | Morris-Cowley | 7322 | Metro Private Car | 1927-28 |
| Rumble | A. | Mount Kokeby | Chevrolet | BO ● 39 | Brookton Road Board | 1927-28 |
| Rumble | E. H. | 419 Rokeby Road, Subiaco | Nash | 4811 | Metro Private Car | 1927-28 |
