| L' Huillier | O. D. | Nanson | Nash | CU ● 2 | Upper Chapman Road Board | 1924-25 |
| L'Huillier | O. D. | Nanson | Nash | CU ● 2 | Upper Chapman Road Board | 1925-26 |
| L'Huillier | O. D. | Nanson | Nash | CU ● 2 | Upper Chapman Road Board | 1926-27 |
| L'Huillier | O. D. | Nanson | Nash | CU ● 2 | Upper Chapman Road Board | 1927-28 |
| L. L. G. Insurance Co Ltd | - | Saint George's Terrace, Perth | Citroen | 8364 | Metro Private Car | 1925-26 |
| L.L.G Insurance Co Ltd | - | Saint George's Terrace, Perth | Citroen | 8364 | Metro Private Car | 1926-27 |
| La Mott | Walter | 40 Stone Street, Perth | Minerva 3 H.P. | P 785 | Perth Municipality | 1916 |
| La Motte | W. | 40 Stone Street, West Perth | Minerva 12-14 H.P. | P 785 | Perth Municipality | 1915 |
| La Motte | W. | 282 William Street, Victoria Park | Ford | 566 | Metro Private Car | 1922-23 |
| La Motte | W. | 152 Brisbane Street, Perth | Ford | 566 | Metro Private Car | 1925-26 |
| La Motte | W. | 152 Brisbane Street, Perth | Ford | 8647 | Metro Private Car | 1926-27 |
| La Motte | Walter | Cr. William and Brisbane Streets, Perth | Ford | 566 | Metro Private Car | 1923-24 |
| La Motte | Walter | Clarence Street, North Perth | Ford | 8647 | Metro Private Car | 1927-28 |
| Labour Pastoral Bureau | - | Carnarvon | Reo Truck | CN 37 | Carnarvon Municipal Council | 1924-25 |
| Labour Pastoral Bureau | - | Carnarvon | Reo Truck | CN 38 | Carnarvon Municipal Council | 1924-25 |
| Labour Pastoral Bureau | - | Carnarvon | Reo Truck | CN 37 | Carnarvon Municipal Council | 1925-26 |
| Labour Pastoral Bureau | - | Carnarvon | Reo Truck | CN 38 | Carnarvon Municipal Council | 1925-26 |
| Labour Pastoral Bureau | - | Carnarvon | Reo Truck | CN 37 | Carnarvon Municipal Council | 1926-27 |
| Labour Pastoral Bureau | - | Carnarvon | Reo Truck | CN 38 | Carnarvon Municipal Council | 1926-27 |
| Labour Pastoral Bureau | - | Carnarvon | Reo Truck | CN 38 | Carnarvon Municipal Council | 1927-28 |
| Lacey | E. | Gnaweeda Station | Chevrolet | MK ● 60 | Meekatharra Road Board | 1925-26 |
| Lacey | E. | Meekatharra | Chevrolet | MK ● 60 | Meekatharra Road Board | 1927-28 |
| Lacey | H. J. | Labouchere Road, Como | Overland | 4529 | Metro Private Car | 1927-28 |
| Lacey | L. B. | Popanyinning | Ford | CN ● 9 | Cuballing Road Board | 1925-26 |
| Lacey | L. B. | Popanyinning | Ford | CN ● 9 | Cuballing Road Board | 1926-27 |
| Lacey | L. B. D. B | Popanyinning | Ford | CN ● 9 | Cuballing Road Board | 1924-25 |
| Lacey | L. B. D. G. | Popanyinning | Ford | CN ● 9 | Cuballing Road Board | 1923-24 |
| Lacey | W. H. | Popanyinning | Ford | CN ● 9 | Cuballing Road Board | 1927-28 |
| Lachlan and Speechly | - | 65 Stirling Street, Perth | Standard | 4788 | Metro Private Car | 1923-24 |
| Lacy | H. J. | Labouchere Road, South Perth | Ford | 4529 | Metro Private Car | 1925-26 |
| Lacy | H. J. | Labouchere Road, South Perth | Ford | 4529 | Metro Private Car | 1926-27 |
| Lader | Miss M. | 16 Wood Street, Fremantle | Chevrolet | 5016 | Metro Private Car | 1925-26 |
| Ladger | G. R. | C/o Caris Bros. Perth | Palladium | 7253 | Metro Private Car | 1927-28 |
| Ladhams | G. | Bridgetown | Chevrolet Truck | B ● 167 | Bridgetown Road Board | 1926-27 |
| Ladhams | J. H. | Pemberton | Rugby Wagon | WA ● 181 | Manjimup Road Board | 1926-27 |
| Ladhams | J. H. | Pemberton | Rugby Wagon | WA ● 181 | Manjimup Road Board | 1927-28 |
| Ladhams | T. G. | Bridgetown | Ford Truck | B ● 138 | Bridgetown Road Board | 1927-28 |
| Ladlier | Mrs M. | Carnarvon | Buick | CN 3 | Carnarvon Municipal Council | 1927-28 |
| Ladner | K. L. | 56 Attfield Street, Fremantle | Chevrolet | 15863 | Metro Private Car | 1927-28 |
| Ladrer | Miss M. | 16 Wood Street, Fremantle | Chevrolet | 5016 | Metro Private Car | 1924-25 |
| Lady Harriett Gold Mine | - | Menzies | Chervrolet Truck | MN ● 76 | Menzies Road Board | 1927-28 |
| Ladyman | - | Kellerberrin | - | KA ● 127 | Katanning Road Board | 1923-24 |
| Ladyman | A. E. | Katanning | Overland 30 H.P. | KA 15 | Katanning Road Board | 1916 |
| Ladyman | A. E. | Kojonup | Ford | KO ● 34 | Kojonup Road Board | 1922-23 |
| Ladyman | A. E. | Kojonup | Ford | KO ● 34 | Kojonup Road Board | 1923-24 |
| Ladyman | A. E. | Kojonup | Rugby | KO ● 74 | Kojonup Road Board | 1924-25 |
| Ladyman | A. E. | Kojonup | Rugby | KO ● 74 | Kojonup Road Board | 1925-26 |
| Ladyman | A. E. | Kojonup | Rugby | KO ● 74 | Kojonup Road Board | 1926-27 |
| Ladyman | A. E. | Kojonup | Rugby | KO ● 74 | Kojonup Road Board | 1927-28 |
| Ladyman | A. F. | Broomehill | Triumph 3¾ H.P. Motorcycle | BH ● 12 | Broomehill Road Board | 1922-23 |