| Klein | J. A. | 12 James Street, Swanbourne | Hupmobile | 5584 | Metro Private Car | 1927-28 |
| Klein | W. | Wubin | Hupmobile | DL ● 56 | Dalwallinu Road Board | 1924-25 |
| Klein | W. | Wubin | Hupmobile | DL ● 56 | Dalwallinu Road Board | 1925-26 |
| Klein | W. | Wubin | Hupmobile | DL ● 70 | Dalwallinu Road Board | 1926-27 |
| Klein | W. | Wubin | Hupmobile | DL ● 70 | Dalwallinu Road Board | 1927-28 |
| Klem | B. E. | 12 James Street, Swanbourne | Ford | 2605 | Metro Private Car | 1923-24 |
| Klenk | C. C. | Victoria Avenue | Studebaker 20 H.P. | NF 236 | North Fremantle Municipality | 1917-18 |
| Klenk | C. C. | Victoria Avenue | Overland 20 H.P. | NF 236 | North Fremantle Municipality | 1919 |
| Klenk | C. C. | Victoria Avenue, North Fremantle | Buick | 6056 | Metro Private Car | 1924-25 |
| Klenk | Chas. | Victoria Avenue, North Fremantle | Overland | 1807 | Metro Private Car | 1923-24 |
| Klien | A. | 5 Hyde Street, Mount Lawley | Ford | 6893 | Metro Private Car | 1927-28 |
| Klinac | Toni | West Boulder Lease | Erskine - Hire Car | K ● 10 | Kalgoorlie Road Board | 1927-28 |
| Klintworth | F. | Kalgan Mount Barker | Ford | PL ● 9 | Plantagenet Road Board | 1924-25 |
| Klintworth | F. | Mount Baker | Ford | PL ● 9 | Plantagenet Road Board | 1924-25 |
| Klintworth | F. | Mount Barker | Ford | PL ● 9 | Plantagenet Road Board | 1925-26 |
| Klintworth | J. | Mount Baker | Rugby | PL ● 2 | Plantagenet Road Board | 1924-25 |
| Klintworth | J. | Mount Barker | Rugby | PL ● 2 | Plantagenet Road Board | 1925-26 |
| Klintworth | John | Mount Barker | Dodge | PL ● 164 | Plantagenet Road Board | 1927-28 |
| Kloos | F. | Menlup | Chevrolet Truck | DU ● 142 | Dumbleyung Road Board | 1927-28 |
| Klopper | A. B. | - | Ford Truck | N ● 86 | Northam Road Board | 1927-28 |
| Klopper | H. F. | Bridgetown | Morris Truck | B ● 163 | Bridgetown Road Board | 1926-27 |
| Klopper | H. F. | Bridgetown | Morris | B ● 159 | Bridgetown Road Board | 1927-28 |
| Klopper | H. F. | Bridgetown | Morris Truck | B ● 163 | Bridgetown Road Board | 1927-28 |
| Klopper Bros | - | Bridgetown | Chevrolet | B ● 123 | Bridgetown Road Board | 1925-26 |
| Klopper Bros | - | Bridgetown | Chevrolet | B ● 123 | Bridgetown Road Board | 1926-27 |
| Klopper Bros | - | Bridgetown | Chevrolet | B ● 123 | Bridgetown Road Board | 1927-28 |
| Klug | C. | Queen of the Hills G. M., Meekatharra | - | MK 2 | Murchison Road Board | 1915 |
| Klug | E. B. | Meekatharra | De Dion | MK 7 | Meekatharra Roads Borad | 1916 |
| Klug | H. E | Williams | Dodge | WL ● 1 | Williams Road Board | 1926-27 |
| Klug | H. E. | Williams | Dodge | WL ● 1 | Williams Road Board | 1925-26 |
| Klug | H. E. | Williams | Dodge | WL ● 1 | Williams Road Board | 1927-28 |
| Kluth | Mrs M. | John Street, Osborne Park | Ford Truck | P ● 156 | Perth Road Board | 1927-28 |
| Knapp | A. | 14 Altona Street | Talbot 10 H.P. | P 1 | Perth Municipality | 1915 |
| Knapp | A. | 14 Altona Street | Talbot 12-15 H.P. | P 1 | Perth Municipality | 1916 |
| Knapp | A. | 14 Altona Street | Talbot 15 H.P. | P 1 | Perth Municipality | 1917-18 |
| Knapp | A. | 14 Altona Street | Clement-Talot 12 H.P. | P 1 | Perth Municipality | 1919 |
| Knapp | A. | 14 Altona Street, West Perth | Packard | 25 | Metro Private Car | 1927-28 |
| Knapp | August | 14 Altona Street | Talbot | 25 | Metro Private Car | 1922-23 |
| Knapp | August | 14 Altona Street, West Perth | Buick | 25 | Metro Private Car | 1923-24 |
| Knapp | August | 14 Altona Street, West Perth | Buick | 25 | Metro Private Car | 1925-26 |
| Knapp | August | 14 Altona Street, West Perth | Buick | 25 | Metro Private Car | 1926-27 |
| Knapp | Augustus | 14 Altona Street, West Perth | Buick | 25 | Metro Private Car | 1926-27 |
| Knapp | D. | Torbay | Ford | A ● 11 | Albany Road Board | 1924-25 |
| Knapp | D. | Torbay | Ford | A ● 11 | Albany Road Board | 1925-26 |
| Knapp | D. | Torbay | Ford | A ● 11 | Albany Road Board | 1926-27 |
| Knapp | G. | Ballidu | Dodge | WB ● 93 | Wongan-Ballidu Road Board | 1926-27 |
| Knapp | G. | Ballidu | Dodge | WB ● 93 | Wongan-Ballidu Road Board | 1927-28 |
| Knapp | H. | Fitzgerald Street | International Truck | N 46 | Northam Municipality | 1922-23 |
| Knapp | H. | Fitzgerald Street | International Truck | N 46 | Northam Municipality | 1923-24 |
| Knapp | H. | Fitzgerald Street | International Truck | N 46 | Northam Municipality | 1924-25 |
