| Jeffries | J. A. | Fitzgerald Street | Studebaker | N 100 | Northam Municipality | 1926-27 |
| Jenkenson | G. A. | 59, Guildford Road, Mount Lawley | Fiat | 2618 | Metro Private Car | 1924-25 |
| Jenkenson | W. | James Street, Guildford | Ford | G 18 | Guildford Municipality | 1917-18 |
| Jenkin | H. V. | Mount Barker | Dodge | PL ● 67 | Plantagenet Road Board | 1927-28 |
| Jenkins | G H. | 104 Keightly Road, Subiaco | Rugby | 9024 | Metro Private Car | 1926-27 |
| Jenkins | G. H. | 104 Keightly Road, Subiaco | Rugby | 9024 | Metro Private Car | 1925-26 |
| Jenkins | H. E. | Armadale | Austin 7 H.P. | A-K ● 54 | Armadale-Kelmscott Road Board | 1924-25 |
| Jennings | W. J. | 328 Barker Road, Subiaco | Ford | 9577 | Metro Private Car | 1927-28 |
| Jensen | Laura | Wickepin | Ford 20 H.P. | WK ● 9 | Wickepin Road Board | 1917-18 |
| Jensen Bros | - | C/o Westlake Band & Co, E.S.A Buildings | Gray | 9503 | Metro Private Car | 1926-27 |
| Jenzen | S. | Cunderdin | Ford | ME ● 78 | Meckering Road Board | 1927-28 |
| Jeynsen | C. H. | Holyoake | Overland | MY ● 266 | Murray Road Board | 1927-28 |
| Jlunketts Joinery Works | - | Smith Street, Perth | Ford | 7549 | Metro Private Car | 1927-28 |
| Jobsell | F. | 16 Edinborough Street, Mount Hawthorn | Studebaker | 7651 | Metro Private Car | 1925-26 |
| Jodrell | F. | 16 Edinboro Street, Mount Hawthorn | Studebaker | 13753 | Metro Private Car | 1926-27 |
| Joel B. & Clarke | - | Ferguson | Ford Lorry | DA ● 24 | Dardanup Road Board | 1927-28 |
| Johannson Kerosene Motors Ltd | - | Weld Chambers | Ford | 2646 | Metro Private Car | 1923-24 |
| John | G. G. | Leake Street, Cottesloe | Stephens | 5248 | Metro Private Car | 1926-27 |
| John | G. G. | Leake Street, Peppermint Grove | Dodge 20 H.P. | PG 35 | Peppermint Grove Road Board | 1919 |
| John | G. G. | Leake Street, Cottesloe | Stephens | 5248 | Metro Private Car | 1924-25 |
| John | G. G. | Leake Street, Cottesloe | Stephens | 5248 | Metro Private Car | 1925-26 |
| John | H. A. | 93 Keightley Road, Subiaco | Ford | 2492 | Metro Private Car | 1927-28 |
| John | M. S. | Leake Street, Cottesloe | Stephens | 7036 | Metro Private Car | 1925-26 |
| John | M. S. | Leake Street, Cottesloe | Stephens | 7036 | Metro Private Car | 1926-27 |
| John | M. S. | Leake Street, Cottesloe | Stephens | 7036 | Metro Private Car | 1927-28 |
| Johns | G. G. | Leake Street, Cottesloe | Dodge | 1035 | Metro Private Car | 1922-23 |
| Johns | J. D. | Doodlakine | Chrysler | KE ● 384 | Kellerberrin Road Board | 1927-28 |
| Johns | N. G. | Doodlakine | Chevrolet | KE ● 155 | Kellerberrin Road Board | 1925-26 |
| Johns | N. G. | Doodlakine | Chevrolet Truck | KE ● 12 | Kellerberrin Road Board | 1926-27 |
| Johns | N. G. | Doodlakine | Chevrolet Truck | KE ● 12 | Kellerberrin Road Board | 1927-28 |
| Johns | N. G. | Doodlakine | Chevrolet | KE ● 155 | Kellerberrin Road Board | 1927-28 |
| Johns | W. | Albany | Studebaker | A 42 | Municipality of Albany | 1924-25 |
| Johns | W. | Albany | Studebaker | A 42 | Municipality of Albany | 1925-26 |
| Johns | W. | Albany | Studebaker | A 42 | Municipality of Albany | 1926-27 |
| Johnson | A. | - | Studebaker | CU ● 98 | Upper Chapman Road Board | 1925-26 |
| Johnson | A. | - | Studebaker | CU ● 98 | Upper Chapman Road Board | 1926-27 |
| Johnson | C. | Doodlakine | Ford | KE ● 39 | Kellerberring Road Board | 1923-24 |
| Johnson | C. | Doodlakine | Ford | KE ● 39 | Kellerberrin Road Board | 1924-25 |
| Johnson | C. T. | Doodlakine | Ford | KE ● 39 | Kellerberrin Road Board | 1922-23 |
| Johnson | D | Cunderdin | Chevrolet | ME ● 11 | Meckering Road Board | 1927-28 |
| Johnson | D. | Doodlakine | Ford | KE ● 2 | Kellerberrin Road Board | 1925-26 |
| Johnson | D. | Doodlakine | Ford | KE ● 2 | Kellerberrin Road Board | 1926-27 |
| Johnson | D. | Doodlakine | Ford | KE ● 21 | Kellerberrin Road Board | 1927-28 |
| Johnson | E. | Cunderdin | Chevrolet | ME ● 11 | Meckering Road Board | 1926-27 |
| Johnson | E. B. | Wickepin | Essex | WK ● 15 | Wickepin Road Board | 1924-25 |
| Johnson | G. | Doodlakine | Ford Truck | KE ● 134 | Kellerberrin Road Board | 1925-26 |
| Johnson | G. | Doodlakine | Ford Truck | KE ● 134 | Kellerberrin Road Board | 1926-27 |
| Johnson | G. | Doodlakine | Ford Truck | KE ● 134 | Kellerberrin Road Board | 1927-28 |
| Johnson | G. | Kellerberrin | Graham Truck | KE ● 340 | Kellerberrin Road Board | 1927-28 |
| Johnson | G. G. | Leake Street, Cottesloe | Stephens | 5248 | Metro Private Car | 1927-28 |