| Ormesher & Tickle | - | Baandee | Studebaker | KE ● 198 | Kellerberrin Road Board | 1925-26 |
| Ormesher & Tickle | - | Baandee | Studebaker | KE ● 198 | Kellerberrin Road Board | 1926-27 |
| Ormesher & Tickle | - | Baandee | Studebaker | KE ● 198 | Kellerberrin Road Board | 1927-28 |
| Ormesher & Tickle | - | Baandee | Chevrolet Truck | KE ● 231 | Kellerberrin Road Board | 1927-28 |
| Orr | R. | Arthur River | Studebaker | AW ● 18 | West Arthur Road Board | 1925-26 |
| Orr | R. | Arthur River | Studebaker | AW ● 18 | West Arthur Road Board | 1926-27 |
| Orr | R. | Arthur River | Studebaker | AW ● 18 | West Arthur Road Board | 1927-28 |
| Orr | R. | Newdegate | Chevrolet | LG ● 75 | Lake Grace Road Board | 1927-28 |
| Orr | Rbt. | Arthur River | Studebaker | AW ● 18 | West Arthur Road Board | 1924-25 |
| Orr | Robert | Arthur River | Studebaker | AW ● 18 | Arthur (West) Road Board | 1923-24 |
| Orr | Wallace | 48 Rupert Street, Subiaco | Studebaker 35 H.P. | Ce 87 | Municipality of Cottesloe | 1919 |
| Orsalti | J. | Shotts | Studebaker | CO ● 68 | Collie Road Board | 1926-27 |
| Orsatti | J. | Shotts | Studebaker | CO ● 68 | Collie Road Board | 1925-26 |
| Orton | A. E. | Rockingham | Studebaker Truck | RO ● 65 | Rockingham Road Board | 1927-28 |
| Osbourne | E. C. | 18 Kershaw Street, Subiaco | Studebaker | 1232 | Metro Private Car | 1922-23 |
| Ottaway | K. A. | Bedfordale | Ford Truck | A-K ● 70 | Armadale-Kelmscott Road Board | 1924-25 |
| Ottaway | K. A. | Bedfordale | Ford Truck | A-K ● 70 | Armadale-Kelmscott Road Board | 1925-26 |
| Ottaway | K. A. | Bedfordale | Ford Truck | A-K ● 70 | Armadale-Kelmscott Road Board | 1926-27 |
| Ottaway | K. A. | Bedfordale | Ford Truck | A-K ● 70 | Armadale-Kelmscott Road Board | 1927-28 |
| Ottway | W. | Cunderdin | Ford | ME ● 23 | Meckering Road Board | 1923-24 |
| Ottway | W. | Cunderdin | Ford | ME ● 23 | Meckering Road Board | 1924-25 |
| Ottway | W. | Cunderdin | Ford | ME ● 23 | Meckering Road Board | 1926-27 |
| Owen | E. | Kellerberrin | Chevrolet Truck | KE ● 367 | Kellerberrin Road Board | 1927-28 |
| Owen | L. C. | Pickering Brook | Grant | DR ● 27 | Darling Range Road Board | 1923-24 |
| Owen | L. C. | Pickering Brook | Grant | DR ● 27 | Darling Range Road Board | 1924-25 |
| Owen | L. C. | Pickering Brook | Grant | DR ● 27 | Darling Range Road Board | 1925-26 |
| Owen | O. E | Pickering Brook | Reo Truck | DR ● 50 | Darling Range Road Board | 1926-27 |
| Owen | O. E. | Pickering Brook | Reo Truck | DR ● 50 | Darling Range Road Board | 1924-25 |
| Owen | O. E. | Pickering Brook | Reo Truck | DR ● 50 | Darling Range Road Board | 1925-26 |
| Owen | O. E. | Pickering Brook | Reo Truck | DR ● 50 | Darling Range Road Board | 1927-28 |
| Owen | O.E. | Pickering Brook | Austin truck | DR ● 26 | Darling Range Road Board | 1923-24 |
| Owen | R. C. | Pickering Brook | Austin | DR ● 133 | Darling Range Road Board | 1927-28 |
| Owen | W. L. | Armadale | Essex | A-K ● 63 | Armadale-Kelmscott Road Board | 1924-25 |
| P.W.D. | Mr Kelly | Busselton | Ford | 4124 | Metro Private Car | 1924-25 |
| Packer | H. S. | Cannington | Dort | 8573 | Metro Private Car | 1927-28 |
| Packer & Harsey | - | Cannington | International Wagon | 8630 | Metro Private Car | 1927-28 |
| Packer & Hersey | - | Cannington | International | GS ● 16 | Gosnells Road Board | 1924-25 |
| Packer & Hersey | - | Cannington | Dodge | GS ● 24 | Gosnells Road Board | 1924-25 |
| Packer & Hersey | - | Cannington | Dort | GS ● 29 | Gosnells Road Board | 1924-25 |
| Packer and Hersey | - | Cannington | International | GS ● 16 | Gosnells Road Board | 1923-24 |
| Packham | F. | Tammin | Maxwell | ME ● 161 | Meckering Road Board | 1925-26 |
| Packham | F. | Tammin | Maxwell | ME ● 161 | Meckering Road Board | 1926-27 |
| Packham | F. | Tammin | Maxwell | ME ● 161 | Meckering Road Board | 1927-28 |
| Packham | J. | Tammin | Ford 20 H.P. | MKB 10 | Meckering Road Board | 1915 |
| Packham | J. J. | Tammin | Buick | ME ● 158 | Meckering Road Board | 1925-26 |
| Packham | J. J. | Tammin | Cuick | ME ● 158 | Meckering Road Board | 1926-27 |
| Packham | J. J. | Tammin | Buick | ME ● 158 | Meckering Road Board | 1927-28 |
| Packham & Sons | - | - | Ford 20 H.P. | ME 10 | Meckering Road Board | 1916 |
| Packham & Sons | - | Tammin | Dodge | ME ● 10 | Meckering Road Board | 1922-23 |
| Packham & Sons | - | Tammin | Dodge | ME ● 10 | Meckering Road Board | 1923-24 |
