| Kununoppin-Trayning Road Board | - | Trayning | Overland | KTY ● 28 | Kununoppin-Trayning Road Board | 1924-25 |
| Kununoppin-Trayning Road Board | - | Trayning | Overland | KTY ● 28 | Kununoppin-Trayning Road Board | 1925-26 |
| Kunzall | G. E. | North Dandalup | Dodge | MY ● 177 | Murray Road Board | 1926-27 |
| Kupsch | C. F. | - | Rugby | CU ● 136 | Upper Chapman Road Board | 1926-27 |
| Kupsch | W. | Northern Gully | Overland | G ● 24 | Geraldton Road Board | 1925-26 |
| Kupsch | W. | Northern Gully | Overland | G ● 24 | Geraldton Road Board | 1926-27 |
| Kupsch | W. | Northern Gully | Studebaker | G ● 41 | Geraldton Road Board | 1927-28 |
| Kupsch | Wm. | Northam Gully | Overland | G ● 10 | Geraldton Road Board | 1923-24 |
| Kurnutt | L. | Wagin | Chevrolet Truck | WN 70 | Wagin Municipality | 1925-26 |
| Kurnutt | L. | Wagin | Chevolet Truck | WN 70 | Wagin Municipality | 1926-27 |
| Kurnutt | L. | Wagin | Chevrolet Truck | WN 70 | Wagin Municipality | 1927-28 |
| Kurth | C. D. | 118 Murray Street | Hupmobile 15 H.P. | P 1117 | Perth Municipality | 1919 |
| Kurth | C. D. | City Hotel, Perth | Dodge | 1406 | Metro Private Car | 1922-23 |
| Kurth | C. D. | 349 Hay Street, Perth | Dodge | 1406 | Metro Private Car | 1923-24 |
| Kurth | C. D. | 11 Clifton Crescent, Mount Lawley | Essex | 1406 | Metro Private Car | 1924-25 |
| Kurth | C. D. | 11 Clifton Crescent, Mount Lawley | Essex | 1406 | Metro Private Car | 1925-26 |
| Kurth | C. D. | 11 Clifton Crescent, Mount Lawley | Essex | 1406 | Metro Private Car | 1926-27 |
| Kurth | C. M. | Saint George's Terrace, Perth | Morris-Cowley | 1800 | Metro Private Car | 1927-28 |
| Kurth | E. | - | Indian 7 H.P. Motorcycle | KMC 41 | Kalgoorlie Municipality | 1915 |
| Kurth Lombard Chrs. | C. D. | Saint George's Terrace | Ford 20 H.P. | P 651 | Perth Municipality | 1917-18 |
| Kutts | J. | Denmark | Reo Wagon | DE ● 11 | Denmark Road Board | 1924-25 |
| Kuzmic | T. P. | Upper Swan | Ford Truck | SW ● 86 | Swan Road Board | 1926-27 |
| Kuzmic | T. P. | Upper Swan | Ford Truck | SW ● 86 | Swan Road Board | 1927-28 |
| Kyle | H. B. | Lister House, Saint George's Terrace | Oakland | 1790 | Metro Private Car | 1927-28 |
| Kynaston | W. | Ferguson Street | Ford 20 H.P. | MJ 66 | Midland Junction Municipality | 1916 |
| Kynaston | W. | Ferguson Street | Buick 20 H.P. | MJ 66 | Midland Junction Municipality | 1917-18 |
| Kynaston | W. | Ferguson Street | Buick 20 H.P. | MJ 66 | Midland Junction Municipality | 1919 |
| Kynaston | W. | Ferguson Street, Midland Junction | Buick 20 H.P. | P 1244 | Perth Municipality | 1919 |
| Kynaston | W. | Ferguson Street, Midland Junction | Hudson | 3170 | Metro Hire or Trade | 1926-27 |
| Kynaston | W. | Ferguson Street, Midland Junction | Hudson | 3170 | Metro Hire or Trade | 1927-28 |
| Kynaston | Wm. | Ferguson Street, Midland Junction | Buick | 3170 | Metro Vehicle for Hire | 1922-23 |
| Kyneston | W. | Ferguson Street, Midland Junction | Hupmobile | 3170 | Metropolitan Hire and Trade Cars | 1923-24 |
| Kyneston | W. | Ferguson Street, Midland Junction | Hupmobile | 3170 | Metro Private Car | 1924-25 |
| Kyneston | W. | Ferguson Street, Midland Junction | Hupmobile | 3170 | Metro Hire or Trade | 1925-26 |
| Kyrwood | W. P. | 84 Rowland Street, Subiaco | Austin | 11710 | Metro Private Car | 1927-28 |
