| Knight Digby | L. | 59 Malcolm Street, Perth | Hudson | 600 | Metro Private Car | 1924-25 |
| Knight Dighy Bank Chambers | L. S. S. & A. | William Street | Chrysler | 600 | Metro Private Car | 1927-28 |
| Knight E.S.A. Bank Chambers | Digby L. | William Street | Hudson | 600 | Metro Private Car | 1925-26 |
| Knight Motors Ltd | - | Perth | FalCon-Knight | 2574 | Metro Private Car | 1927-28 |
| Knights | A. F. | Katanning | Rugby | KA ● 109 | Katanning Road Board | 1926-27 |
| Knights | E. | Keane Street, Midland Junction | Chevrolet | 8772 | Metro Private Car | 1925-26 |
| Knights | E. | Keane Street, Midland Junction | Chevrolet | 8772 | Metro Private Car | 1926-27 |
| Knights | E. J. | Keane Street, Midland Junction | Chevrolet | 8772 | Metro Private Car | 1927-28 |
| Knights | T. G. | Keane Street, Middle Junction | Dodge | 7745 | Metro Private Car | 1927-28 |
| Knipe | E. O. | Menzies | Ford | MN ● 19 | Menzies Road Board | 1924-25 |
| Knipe | E. O. | Menzies | Ford | MN ● 19 | Menzies Road Board | 1925-26 |
| Knipe | E. O. | Ardath | Ford | BK ● 247 | Bruce Rock Road Board | 1927-28 |
| Knobb | J. | Derby | Vulcan Truck | KW ● 29 | West Kimberley Road Board | 1925-26 |
| Knoop | C. | Kukerin | Triumph Motorcycle | DU ● 2 | Dumbleyung Road Board | 1922-23 |
| Knopp | J. | Derby | Ford Truck | KW ● 35 | West Kimberley Road Board | 1926-27 |
| Knopp | J. | Derby | Ford Truck | KW ● 35 | West Kimberley Road Board | 1927-28 |
| Knott | A. | Dumbleyung | Harley-Davidson 8 H.P. Motorcycle | DU ● 6 | Dumbleyung Road Board | 1922-23 |
| Knott | H. G. | Lake Grace | Overland | LG ● 54 | Lake Grace Road Board | 1925-26 |
| Knott | H. G. | Lake Grace | Overland | LG ● 54 | Lake Grace Road Board | 1926-27 |
| Knott | James | Narrogin | Ford Truck | NGN 84 | Narrogin Municipality | 1927-28 |
| Knott | R. | Dumbleyung | Bradbury 3½ H.P. Motorcycle | DU ● 12 | Dumbleyung Road Board | 1919 |
| Knott | R. | Dumbleyung | Indian 9 H.P. H.P. Motorcycle | DU ● 12 | Dumbleyung Road Board | 1922-23 |
| Knott | R. | Dumbleyung | Ford | DU ● 50 | Dumbleyung Road Board | 1923-24 |
| Knott | R. | Dumbleyung | Ford | DU ● 50 | Dumbleyung Road Board | 1924-25 |
| Knott | R. | Dumbleyung | Ford | DU ● 50 | Dumbleyung Road Board | 1925-26 |
| Knott | R. | Dumbleyung | Ford | DU ● 50 | Dumbleyung Road Board | 1926-27 |
| Knott | R. | Dumbleyung | Ford | DU ● 50 | Dumbleyung Road Board | 1927-28 |
| Knott | R. J. | Dumbleyung | 3 H.P. Motorcycle | DU ● 8 | Dumbleyung Road Board | 1917-18 |
| Knott | R. J. | Dumbleyung | Overland | DU ● 118 | Dumbleyung Road Board | 1927-28 |
| Know | W. D. | Bedford Street, East Fremantle | Chevrolet | 1934 | Metro Private Car | 1923-24 |
| Knowels | Mrs A. M. | Kojonup | Dodge | KO ● 158 | Kojonup Road Board | 1927-28 |
| Knowies | W. | Ashburton Downs | Overland | AS ● 74 | Ashburton Road Board | 1925-26 |
| Knowies | W. | Ashburton Down | Overland | AS ● 74 | Ashburton Road Board | 1927-28 |
| Knowler | J. | Regent House, Perth | Whippet | 5885 | Metro Private Car | 1927-28 |
| Knowles | H. P. | 187 Marmion Street, Cottesloe | Reo Truck | 10509 | Metro Hire or Trade | 1927-28 |
| Knowles | Mrs A. M. | Kojonup | Dodge | KO ● 87 | Kojonup Road Board | 1925-26 |
| Knowles | T. B. | Broome Hill | Overland 25-3 H.P. | B 2 | Broome Municipality | 1915 |
| Knowles | W. | Glenflorrie Street, Onslow | B.S.A. Motorcycle | AS ● 9 | Ashburton Road Board | 1922-23 |
| Knowles | W. | Ashburton Down | Overland | AS ● 74 | Ashburton Road Board | 1926-27 |
| Knowles | W. K. | Esplanade Hotel, Perth | Buick | 6733 | Metro Private Car | 1924-25 |
| Knowley | H. P. | 187 Marmion Street, Cottesloe | Reo Truck | 10509 | Metro Hire or Trade | 1926-27 |
| Knox | G. N. | Swan Street, Guildford | Fiat | 4842 | Metro Private Car | 1927-28 |
| Knox | J. | Railway Terrace, Maylands | Maxwell 18 H.P. | P ● 24 | Perth Road Board | 1917-18 |
| Knox | J. | - | Maxwell | P ● 24 | Perth Road Board | 1919 |
| Knox | J. | 196 Railway Terrace, Maylands | Maxwell | 477 | Metro Private Car | 1924-25 |
| Knox | J. | 181 Railway Parade, Maylands | Maxwell | 477 | Metro Private Car | 1926-27 |
| Knox | James | 196 Railway Terrace, Maylands | Maxwell | 477 | Metro Private Car | 1922-23 |
| Knox | James | 196 Railway Terrace, Maylands | Maxwell | 477 | Metro Private Car | 1923-24 |
| Knox | James | 181 Railway Parade, Maylands | Chevrolet | 14793 | Metro Private Car | 1927-28 |
| Knox | John | East Wickepin | Overland-Crossley Truck | CR ● 318 | Corrigin Road Board | 1927-28 |
