| Rosenberg | - | Broome | Dort | BM ● 52 | Broome Road Board | 1926-27 |
| Rosenberg | I. | Broome | Dort | BM ● 52 | Broome Road Board | 1927-28 |
| Rosenberg | J. M. | 90 Hobart Street, Mount Hawthorn | Chevrolet | 13090 | Metro Private Car | 1926-27 |
| Rosenberg | L. C. | Broome | Studebaker | BM ● 13 | Broome Road Board | 1924-25 |
| Rosenberg | L. C. | Broome | Studebaker | BM ● 13 | Broome Road Board | 1925-26 |
| Rosenburg | J. M. | 90 Hobart Street, Mount Hawthorn | Chevrolet | 13090 | Metro Private Car | 1927-28 |
| Rosendahl | E. | Carmel | Ford | DR ● 12 | Darling Range Road Board | 1926-27 |
| Rosendahl | E. | Carmel | Ford | DR ● 12 | Darling Range Road Board | 1927-28 |
| Rosenstamm | B. | King Street | Triumph 3½ H.P. Motorcycle | P 79 | Perth Municipality | 1915 |
| Rosenstamm | B. | King Street | Triumph 3½ H.P. Motorcycle | P 386 | Perth Municipality | 1915 |
| Rosenstamm | B. | King Street | Triumph 4 H.P. | P 79 | Perth Municipality | 1916 |
| Rosenstamm | B. | King Street, Perth | Triumph 3½ H.P. Motorcycle | P 386 | Perth Municipality | 1916 |
| Rosenstamm | B. | King Street | Triumph 4 H.P. Motorcycle | P 79 | Perth Municipality | 1917-18 |
| Rosenstamm | B. | King Street | Triumph 3½ H.P. Motorcycle | P 386 | Perth Municipality | 1917-18 |
| Rosenstamm | B. | King Street | Triumph 4 H.P. | P 79 | Perth Municipality | 1919 |
| Rosenstamm | B. | King Street | Triumph 3½ H.P. Motorcycle | P 386 | Perth Municipality | 1919 |
| Rosenstamm | B. | King Street, Perth | Buick | 2378 | Metro Private Car | 1922-23 |
| Rosenstamm | B. | King Street, Perth | Dodge | 2848 | Metro Private Car | 1924-25 |
| Rosenstamm | B. | King Street, Perth | Dodge | 2848 | Metro Private Car | 1925-26 |
| Rosenstamm | B. | King Street, Perth | Dodge | 13994 | Metro Private Car | 1926-27 |
| Rosenstamm | B. | King Street, Perth | Morris Wagon | 13247 | Metro Private Car | 1926-27 |
| Rosenstamm | B. | King Street, Perth | Dodge | 2848 | Metro Private Car | 1926-27 |
| Rosenstamm | B. | King Street, Perth | Dodge | 13994 | Metro Private Car | 1927-28 |
| Rosenstamm | B. | King Street, Perth | Morris Wagon | 13247 | Metro Private Car | 1927-28 |
| Rosenstamm | Ben | King Street, Perth | Buick | 2378 | Metro Private Car | 1923-24 |
| Rosenstamm | Ben | King Street, Perth | Dodge | 2848 | Metro Private Car | 1923-24 |
| Rosenthal | C. | Pinjarra | Studebaker | MY ● 46 | Murray Road Board | 1924-25 |
| Rosenthal | C. | Coolup | Overland Truck | MY ● 129 | Murray Road Board | 1925-26 |
| 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 |