| Ottaway | J. F. | 20 Mann Street, Cottesloe | Swift | 6266 | Metro Private Car | 1927-28 |
| Ottaway | J. F. | 20 Mann Street, Cottesloe | Morris Cowley | 7682 | Metro Private Car | 1927-28 |
| 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 |
| Ottaway | T. A. | Hopetoun Street, South Perth | Whippet | 14059 | Metro Private Car | 1926-27 |
| Ottaway | T. A. | Hopetoun Street, South Perth | Whippet | 14059 | Metro Private Car | 1927-28 |
| Ottery | S. J. | Linden | Napier 16-20 H.P. | ML 2 | Mount Malcolm Road Board | 1916 |
| Ottery | S. J. | Linden | Napier 16-20 H.P. | ML ● 11 | Leonora-Malcolm Road Board | 1917-18 |
| Ottery | S. J. | Linden | Napier 16 H.P. | ML 11 | Leonora-Malcolm Road Board | 1919 |
| Ottery | S. J. | Leonora | Ford | LM ● 14 | Leonora-Malcolm Road Board | 1922-23 |
| Ottery | S. J. | Leonora | Ford | LM ● 14 | Leonora-Malcolm Road Board | 1923-24 |
| Ottery | S. J. | Leonora | Ford | LM ● 14 | Leonora-Malcolm Road Board | 1924-25 |
| Ottery | S. J. | Leonora | Ford | LM ● 14 | Leonora-Malcolm Road Board | 1925-26 |
| Ottery | S. J. | Leonora | Ford | LM ● 14 | Leonora-Malcolm Road Board | 1926-27 |
| Ottery | S. J. | Leonora | Ford | LM ● 14 | Leonora-Malcolm Road Board | 1927-28 |
| Ottewell | B. | 59 Broadway, Nedlands | Dodge | 6560 | Metro Private Car | 1925-26 |
| Ottewell | B. | 59 Broadway, Nedlands | Dodge | 6560 | Metro Private Car | 1927-28 |
| Ottewell | H. | 59 Broadway, Nedlands | Dodge | 6560 | Metro Private Car | 1924-25 |
| Ottey | C. | 101 Douro Road, South Fremantle | Ford Truck | 10918 | Metro Hire or Trade | 1927-28 |
| Ottey | Mrs L. | Shaftesbury Hotel, Perth | Morris-Cowley | 5747 | Metro Private Car | 1924-25 |
| Otto | P. B. | 48 King George Street, Victoria Park | Overland | 1403 | Metro Private Car | 1922-23 |
| Otto | P. B. | 48 King George Street, Victoria Park | Overland | 1403 | Metro Private Car | 1923-24 |
| Ottway | C. | Merredin | Chevrolet | MD ● 160 | Merredin 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 |
| Ottwell | B. | 59 Broadway, Nedlands | Dodge | 6560 | Metro Private Car | 1926-27 |
| Otway | A. E. | Beverley | Ford | BE ● 261 | Beverley Road Board | 1927-28 |
| Otway | George | - | Ford Truck | BE ● 252 | Beverley Road Board | 1926-27 |
| Ouealy | M. J. | 232 William Street, Perth | Ford | 2939 | Metro Private Car | 1927-28 |
| Oughton | A. W. | Kondinin | Ford Truck | KN ● 104 | Kondinin Road Board | 1926-27 |
| Oughton | A. W. | Kondinin | Ford Truck | KN ● 104 | Kondinin Road Board | 1927-28 |
| Oulds | S. L. | Dowerin | Buick | D ● 59 | Dowerin Road Board | 1927-28 |
| Outram | H. S. | Stock Road, Hamilton Hill | Ford Van | 7032 | Metro Private Car | 1925-26 |
| Outram | H. S. | Stock Road, Hamilton Hill | Ford Van | 7032 | Metro Private Car | 1926-27 |
| Outram | H. S. | Stock Road, Hamilton Hill | Ford Van | 7032 | Metro Private Car | 1927-28 |
| Ovely | T. | Cardiff | Chevrolet | CO ● 20 | Collie Road Board | 1925-26 |
| Ovens | Hugh | Meekatharra | Buick 15-18 H.P. | MK ● 2 | Meekatharra Road Board | 1917-18 |
| Ovens | Hugh | Meekatharra | Buick 15 H.P. | MK 2 | Meekatharra Road Board | 1919 |
| Ovens | Hugh | Nannine | Buick | MK ● 2 | Meekatharra Road Board | 1922-23 |
| Ovens | J. | Gwambygine | Ford Truck | Y ● 113 | York Road Board | 1925-26 |
| Ovens | J. H. | Gwambygine | Ford Truck | Y ● 113 | York Road Board | 1926-27 |
| Ovens | J. H. | Gwambygine | Chevrolet | Y ● 113 | York Road Board | 1927-28 |
| Ovens | N. | Meekatharra | Buick 15-18 H.P. | MK 2 | Meekatharra Roads Borad | 1916 |
| Ovens | W. | Gwambygine | Dodge | Y ● 96 | York Road Board | 1925-26 |
| Ovens | Wm. | Gwambygine | Dodge | Y ● 120 | York Road Board | 1926-27 |
| Ovens | Wm. | Gwambygine | Overland | Y ● 120 | York Road Board | 1927-28 |
| Over'heu | W. P. | Lomos | Ford | CR ● 12 | Corrigin Road Board | 1924-25 |
