| Olivers Tailoring Co | - | 100-102 William Street, Perth | Hupmobile | 5879 | Metro Private Car | 1924-25 |
| Olivers Tailoring Co | - | 100 William Street, Perth | Rugby | 6444 | Metro Private Car | 1924-25 |
| Olivers Tailoring Co | - | 100 William Street, Perth | Rugby | 6444 | Metro Private Car | 1925-26 |
| Olivers Tailoring Co | - | 100-102 William Street, Perth | Hupmobile | 5879 | Metro Private Car | 1925-26 |
| Olivers Tailoring Co | - | 100 - 102 William Street, Perth | Hupmobile | 5879 | Metro Private Car | 1926-27 |
| Olivers Tailoring Co | - | 100 William Street, Perth | Rugby | 6444 | Metro Private Car | 1926-27 |
| Olivers Tailoring Co | - | William Street, Perth | Rugby | 6519 | Metro Private Car | 1926-27 |
| Olivers Tailoring Co | - | 100-102 William Street, Perth | Hupmobile | 5879 | Metro Private Car | 1927-28 |
| Olivers Trading Co | - | William Street, Perth | Rugby | 6519 | Metro Private Car | 1925-26 |
| Olley | L. | Shaftesbury Hotel, Perth | Willys Knight | 4459 | Metro Private Car | 1925-26 |
| Olley | L. | Shaftesbury Hotel, Perth | Willys-Knight | 4459 | Metro Private Car | 1926-27 |
| Olley | L. O. | Shaftesbury Hotel, Perth | Willys-Knight | 4459 | Metro Private Car | 1927-28 |
| Olley | Lydia Mrs | Shaftesbury Hotel, Perth | Overland | 1939 | Metro Private Car | 1923-24 |
| Olliver | B. M. | 314 Beaufort Street, Perth | Chrysler | 5639 | Metro Private Car | 1927-28 |
| Olliver | Mrs E. | Luxor Flats Beaufort Street, Perth | Chrysler | 14083 | Metro Private Car | 1926-27 |
| Olliver | S. | Albany | Ford | A 19 | Albany Municipality | 1927-28 |
| Ollivier | Mrs E | Karella Street, Nedlands | Chrysler | 14083 | Metro Private Car | 1927-28 |
| Olloton | J. M. | - | Chevrolet Truck | CU ● 84 | Upper Chapman Road Board | 1925-26 |
| Olman | Jane | Broomehill | Ford | BH ● 31 | Broomehill Road Board | 1925-26 |
| Olman | Jane | Broomehill | Ford | BH ● 31 | Broomehill Road Board | 1926-27 |
| Olman | Jane | Broomehill | Ford | BH ● 31 | Broomehill Road Board | 1927-28 |
| Olman | Lena P. | Broomehill | Ford | BH ● 30 | Broomehill Road Board | 1922-23 |
| Olman | Lena P. | Broomehill | Ford | BH 31 | Broomhill Road Board | 1923 - 1924 |
| Olman | Lena P. | Broomehill | Ford | BH ● 31 | Broomehill Road Board | 1924-25 |
| Olney | G. H. | 187 Roberts Road, Subiaco | Buick | 1483 | Metro Private Car | 1924-25 |
| Olney | G. H. | 187 Roberts Road, Subiaco | Buick | 1483 | Metro Private Car | 1925-26 |
| Olney | G. H. | 187 Roberts Road, Subiaco | Buick | 1483 | Metro Private Car | 1927-28 |
| Olsein | H. L. B. | Pt, Chudleigh Road, Cottesloe Beach | Studebaker | 10348 | Metro Hire or Trade | 1926-27 |
| Olsen | H. B. | Cottesloe Beach | Maxwell | 2760 | Metro Private Car | 1924-25 |
| Olsen | H. B. | Chudleigh Road, Cottesloe Beach | Maxwell | 3827 | Metro Hire or Trade | 1925-26 |
| Olsen | H. B. | Bateman Street, Cottesloe Beach | Maxwell | 3827 | Metro Hire or Trade | 1926-27 |
| Olsen | H. E. | Point Chedley Road, Cottesloe Beach | Hudson | 10254 | Metro Hire or Trade | 1926-27 |
| Olsen | Herman | Broker, Cottesloe Beach | Maxwell | 2760 | Metro Private Car | 1923-24 |
| Olsen | J. | 47, Guildford Road, Mount Lawley | Overland | 3038 | Metro Private Car | 1924-25 |
| Olsen | J. | 47, Guildford Road, Mount Lawley | Overland | 3038 | Metro Hire or Trade | 1925-26 |
| Olsen | J. | 47, Guildford Road, Mount Lawley | Overland | 3038 | Metro Hire or Trade | 1926-27 |
| Olsen | J. H. | South Bunbury | Ford 19 H.P. | BB ● 8 | Bunbury Road Board | 1922-23 |
| Olsen | J. H. | South Bunbury | Ford 19 H.P. | BB ● 8 | Bunbury Road Board | 1923 - 1924 |
| Olsen | J. H. | Clarke Street, South Bunbury | Ford Truck | BB ● 8 | Bunbury Road Board | 1925-26 |
| Olsen | J. H. | Clarke Street, South Bunbury | Grant | BB ● 10 | Bunbury Road Board | 1925-26 |
| Olsen | J. H. | Clarke Street, South Bunbury | Ford Truck | BB ● 8 | Bunbury Road Board | 1926-27 |
| Olsen | J. H. | South Bunbury | Ford | BY ● 8 | Bunbury Road Board | 1927-28 |
| Olsen | J. H. | South Bunbury | Grant | BY ● 10 | Bunbury Road Board | 1927-28 |
| Olsen | Jno. | 47 Guildford Road, Mount Lawley | Overland | 3038 | Metropolitan Hire and Trade Cars | 1923-24 |
| Olsen | John Henry | Clarke Street, Bunbury | Grant | BB ● 10 | Bunbury Road Board | 1924-25 |
| Olsen | L. | Gregory Street, Geraldton | Ford | GN 163 | Geraldton Municipality | 1927-28 |
| Olsen | Mrs J. | 46 South Terrace, Fremantle | Durant | 15891 | Metro Private Car | 1927-28 |
| Olsen | Mrs S. | Broomehill | Overland | BH ● 65 | Broomehill Road Board | 1925-26 |
| Olsen | Mrs S. | Broomehill | Overland | BH ● 65 | Broomehill Road Board | 1926-27 |
| Olsen | Mrs S. | Broomehill | Overland | BH ● 65 | Broomehill Road Board | 1927-28 |
