| Harley | Phillip Alec. | Koolanooka | Chevrolet Truck | PM ● 226 | Perenjori-Morawa Road Board | 1927-28 |
| Harling | F. A. | Nokaning | Dodge | MD ● 24 | Merredin Road Board | 1925-26 |
| Harling | H. G. | Korbel | Hupmobile | MD ● 24 | Merredin Road Board | 1924-25 |
| Harling | H. G. | Korbel | Hupmobile | MD ● 24 | Merredin Road Board | 1926-27 |
| Harling | H. H. | Korbel | Durant | MD ● 29 | Merredin Road Board | 1922-23 |
| Harling | H. H. | Korbel | Durant | MD ● 29 | Merredin Road Board | 1923-24 |
| Harling | H. H. | Belka | Hupmobile | MD ● 29 | Merredin Road Board | 1924-25 |
| Harling | H. H. | Belka | Hupmobile | MD ● 29 | Merredin Road Board | 1925-26 |
| Harling | H. H. | Belka | Hupmobile | MD ● 29 | Merredin Road Board | 1926-27 |
| Harling | H. H. | Belka | Hupmobile | MD ● 29 | Merredin Road Board | 1927-28 |
| Harling | Henry G. | Belka | Hupmobile | MD ● 24 | Merredin Road Board | 1927-28 |
| Harlock | H. | 27 High Street, Fremantle | Chevrolet | 9286 | Metro Private Car | 1926-27 |
| Harlock | H. | 27 Lilly Street, Fremantle | Chevrolet | 9286 | Metro Private Car | 1927-28 |
| Harlow | H. W. | - | Chevrolet | NA ● 10 | Nungarin Road Board | 1924-25 |
| Harlow | H. W. | Nungarin | Oldsmobile | NA ● 10 | Nungarin Road Board | 1927-28 |
| Harman | A. | Holyoake | Chevrolet | MY ● 162 | Murray Road Board | 1926-27 |
| Harman | A. | Holyoake | Chevrolet | MY ● 162 | Murray Road Board | 1927-28 |
| Harman | F. | West Swan | Overland | SW ● 45 | Swan Road Board | 1925-26 |
| Harman | F. | West Swan | Overland | SW ● 45 | Swan Road Board | 1926-27 |
| Harman | F. | West Swan | Overland | SW ● 45 | Swan Road Board | 1927-28 |
| Harman | H. | Greenmount | Triumph 3½ H.P. Motorcycle | GE 13 | Greenmount Road Board | 1916 |
| Harman | H. | Cue | Chevrolet Truck | CD ● 66 | Cue-Day Dawn Road Board | 1927-28 |
| Harman | H. E. | Goomalling | Ford Van | GO ● 176 | Goomalling Road Board | 1927-28 |
| Harman | H. P. | Greenmount | Austin | GE ● 43 | Greenmount Road Board | 1924-25 |
| Harman | P. | Wuraming | Ford | MR ● 16 | Marradong Road Board | 1925-26 |
| Harman | P. | Wuraming | Ford | MR ● 16 | Marradong Road Board | 1926-27 |
| Harman | P. | Wuraming | Ford | MR ● 16 | Marradong Road Board | 1927-28 |
| Harman | S. A. | 17 Herbert Street, Guildford Road | Chevrolet Wagon | 3707 | Metro Hire or Trade | 1925-26 |
| Harman | T. | West Swan | Ford | SW ● 33 | Swan Road Board | 1923-24 |
| Harman | T. | West Swan | Repubic Truck | SW ● 109 | Swan Road Board | 1927-28 |
| Harman & Andrews | - | Marmellup | Brookway Truck | SU ● 35 | Sussex Road Board | 1925-26 |
| Harman & Andrews | - | Marmellup | Brockway Truck | SU ● 35 | Sussex Road Board | 1926-27 |
| Harman & Andrews | - | Marmellup | Brockway Truck | SU ● 35 | Sussex Road Board | 1927-28 |
| Harman Thomas & Sons | - | West Swan | Republic Truck | SW ● 33 | Swan Road Board | 1926-27 |
| Harman Thomas & Sons | - | West Swan | Republic Truck | SW ● 33 | Swan Road Board | 1927-28 |
| Harmanis | A. | Port Hedland | Ford Truck | PH ● 45 | Port Hedland Road Board | 1926-27 |
| Harmer | U. | 98 Newcastle Road, Midland Junction | Chevrolet | 1599 | Metro Private Car | 1925-26 |
| Harmer | U. | 98 Newcastle Road, Midland Junction | Chevrolet | 1599 | Metro Private Car | 1926-27 |
| Harmer | U. | 89 Newcastle Road, Midland Junction | Chevrolet | 1599 | Metro Private Car | 1927-28 |
| Harmer | V. | 19 Boundary Road, Midland Junction | Chevrolet | 1599 | Metro Private Car | 1924-25 |
| Harmes | U. | Boundary Road, Midland Junction | Excelsior & Sidecar | 1438 | Metro Motorcycle | 1922-23 |
| Harmes | U. | Boundary Road, Midland Junction | Smith Wheel | 1441 | Metro Motorcycle | 1922-23 |
| Harmon | H. J. | Marmellup | Overland | SU ● 66 | Sussex Road Board | 1926-27 |
| Harmon | H. J. | Marmellup | Overland | SU ● 66 | Sussex Road Board | 1927-28 |
| Harms | W. A. | 202 Adelaide Terrace | Calthorpe 3½ H.P. Motorcycle | P 781 | Perth Municipality | 1917-18 |
| Harms | W. A. | 133 Claremont Avenue, Claremont | Dodge | 14283 | Metro Private Car | 1927-28 |
| Harmson | Louisa | Adderly Street, Claremont | Chevrolet | 5775 | Metro Private Car | 1925-26 |
| Harnett | B. J. | Worsley | Dodge | H ● 114 | Harvey Road Board | 1925-26 |
| Harnett | J. | Worsley | Dodge | CO ● 37 | Collie Road Board | 1924-25 |
| Harnett | R. P. | Worsley | Buick | H ● 70 | Harvey Road Board | 1927-28 |
