| Horsfield & Brackelman | - | Salisbury Road, Kalgoorlie | Ford | K ● 65 | Kalgoorlie Road Board | 1927-28 |
| Horsley | C. | Quairading | Ford | Q ● 71 | Quairading Road Board | 1927-28 |
| Horsley | E. F. | 67 Chelmsford Road, Mount Lawley | Overland | 13556 | Metro Private Car | 1926-27 |
| Horsley | Ernest F | Wagin | Overland 20 H.P. | WM 26 | Wagin Municipality | 1922-23 |
| Horsley | Ernest F. | Wagin | Overland 20 H.P. | WM ● 26 | Wagin Municipality | 1923-24 |
| Horsley | Frank | Wagin | Overland | W ● 39 | Wagin Road Board | 1924-25 |
| Horsley | J. | - | Bradbury | N 4 | Northam Municipality | 1919 |
| Horsman & Bros | - | Bilbarin | Hupmobile | CR ● 197 | Corrigin Road Board | 1927-28 |
| Horsman & Sons | - | Corrigin | Hupmobile | CR ● 197 | Corrigin Road Board | 1926-27 |
| Horswill | T. | Gnowangerup | Ford | GN ● 52 | Gnowangerup Road Board | 1924-25 |
| Horswill | T. | Gnowangerup | Ford | GN ● 52 | Gnowangerup Road Board | 1925-26 |
| Horswill | T. | Gnowangerup | Ford | GN ● 52 | Gnowangerup Road Board | 1926-27 |
| Horswill | T. | Gnowangerup | Ford | GN ● 52 | Gnowangerup Road Board | 1927-28 |
| Horswill | Thomas | Gnowangerup | Ford | GN ● 52 | Gnowangerup Road Board | 1923-24 |
| Horswill | Thomas | Gnowangerup | Ford | GN ● 52 | Gnowangerup Road Board | 1923-24 |
| Hortin | C. T. | Tennessee | Chevrolet | A ● 37 | Albany Road Board | 1927-28 |
| Hortin | F. V. | Torbay | Whippet | A ● 15 | Albany Road Board | 1927-28 |
| Hortin | H. C. | Tennessee | Ford Truck | A ● 43 | Albany Road Board | 1927-28 |
| Horton | A. H. | Manjimup | Overland | WA ● 53 | Manjimup Road Board | 1925-26 |
| Horton | Arthur Henry | Manjimup | Maxwell | WA ● 6 | Warren Road Board | 1924-25 |
| Horton | Arthur Henry | Manjimup | Overland | WA ● 53 | Warren Road Board | 1924-25 |
| Horton | Mrs | York | G.M.C. Truck | Y 35 | York Municipality | 1924-25 |
| Horton | Mrs | York | G.M.C Truck | Y 35 | York Municipality | 1925-26 |
| Horton | Mrs | York | G.M.C. Truck | Y 35 | York Municipality | 1926-27 |
| Horton | Mrs | York | G.M.C. Truck | Y 35 | York Municipality | 1927-28 |
| Horton | S. | Korbel | Chevrolet | MD ● 7 | Merredin Road Board | 1926-27 |
| Horton | V. A. | York | Overland 19 H.P. | Y 93 | York Municipality | 1922-23 |
| Horton | V. A. | York | Hupmobile | Y 93 | York Municipality | 1923-24 |
| Horton | V. A. | York | Hupmobile | Y 93 | York Municipality | 1924-25 |
| Horton | V. A. | York | Hupmobile | Y 93 | York Municipality | 1925-26 |
| Horton | V. A. | York | Hupmobile | Y 93 | York Municipality | 1926-27 |
| Horton | V. A. | York | Hupmobile | Y 93 | York Municipality | 1927-28 |
| Horwood | A. F. | Korrelocking | Ford | WM ● 96 | Wyalkatchem Road Board | 1925-26 |
| Horwood | A. T. | Korrelocking | Standard | WM ● 265 | Wyalkatchem Road Board | 1927-28 |
| Horwood | F. B. | Darkin via Wagin | Ford 20 H.P. | AW ● 6 | West Arthur Road Board | 1922-23 |
| Horwood | F. B. | Darkan via Wagin | Ford 20 H.P. | AW ● 6 | Arthur (West) Road Board | 1923-24 |
| Horwood | F. B. | Darkan via Wagin | Ford 20 H.P. | AW ● 6 | West Arthur Road Board | 1924-25 |
| Horwood | F. B. | Darkan | Ford | AW ● 6 | West Arthur Road Board | 1925-26 |
| Horwood | F. B. | Darkan | Ford | AW ● 25 | West Arthur Road Board | 1926-27 |
| Horwood | F. B. | Darkan | Ford Truck | AW ● 60 | West Arthur Road Board | 1926-27 |
| Horwood | F. B. | Darkan | Ford | AW ● 76 | West Arthur Road Board | 1926-27 |
| Horwood | F. B. | Darkan | Ford | AW ● 6 | West Arthur Road Board | 1927-28 |
| Horwood | F. B. | Darkan | Ford | AW ● 25 | West Arthur Road Board | 1927-28 |
| Horwood | F. B. | Darkan | Ford Truck | AW ● 60 | West Arthur Road Board | 1927-28 |
| Horwood | F. J. | Saint George's Terrace, Perth | Dodge | 2478 | Metro Private Car | 1923-24 |
| Horwood | F. J. | Saint George's Terrace, Perth | Dodge | 2478 | Metro Private Car | 1924-25 |
| Horwood | F. J. | Saint George's Terrace, Perth | Dodge | 2478 | Metro Private Car | 1925-26 |
| Horwood | F. J. | Cunderdin | Dodge | ME ● 51 | Meckering Road Board | 1925-26 |
| Horwood | F. J. | Cunderdin | Dodge | ME ● 51 | Meckering Road Board | 1926-27 |
| Horwood | F. J. | Cunderdin | Dodge | ME ● 51 | Meckering Road Board | 1927-28 |
