| Horner | W. | Kellerberrin | Oakland | KE ● 88 | Kellerberrin Road Board | 1926-27 |
| Horner | W. | Kellerberrin | Oakland | KE ● 88 | Kellerberrin Road Board | 1927-28 |
| Horner | W. J. | Corrigin | Chevrolet | CR ● 232 | Corrigin Road Board | 1926-27 |
| Horner | W. J. | Bulyee | Chevrolet | CR ● 232 | Corrigin Road Board | 1927-28 |
| Horner & Co | C. | 24 Ebsworth Street, Mount Lawley | Ford | 8858 | Metro Private Car | 1925-26 |
| Horner & Co | C. | 24 Ebsworth Street, Mount Lawley | Ford | 8858 | Metro Private Car | 1926-27 |
| Horner & Co | C. | 24 Ebsworth Street, Mount Lawley | Ford | 8858 | Metro Private Car | 1927-28 |
| Hornibrook | M. | Capel | Chevrolet | CP ● 42 | Capel Road Board | 1927-28 |
| Hornibrook | Mrs M. | Capel | Chevrolet | CP ● 42 | Capel Road Board | 1926-27 |
| Hornsby | F. H | Wongan Hills | Ford | WB ● 16 | Wongan-Ballidu Road Board | 1926-27 |
| Hornsby | F. H. | Swan View | Ford | 16006 | Metro Private Car | 1927-28 |
| Hornsby | K. | Moulyinning | Chevrolet | DU ● 207 | Dumbleyung Road Board | 1927-28 |
| Hornsby | K. G. | Moulyinning | Chevrolet Truck | DU ● 167 | Dumbleyung Road Board | 1927-28 |
| Hornsby | L. J | East Wagin | Dodge | W ● 58 | Wagin Road Board | 1926-27 |
| Hornsby | L. J. | Wagin | Dodge | W ● 58 | Wagin Road Board | 1924-25 |
| Hornsby | L. J. | East Wagin | Dodge | W ● 58 | Wagin Road Board | 1925-26 |
| Hornsby | L. J. | Wagin | Dodge | W ● 58 | Wagin Road Board | 1927-28 |
| Hornsby | Mrs M. | Moulyinning | Chevrolet | DU ● 39 | Dumbleyung Road Board | 1924-25 |
| Hornsby | Mrs M. | Moulyinning | Chevrolet | DU ● 39 | Dumbleyung Road Board | 1925-26 |
| Hornsby | S. N. | Merredin | Dodge | MD ● 116 | Merredin Road Board | 1926-27 |
| Hornsby | S. N. | 27 Dundas Road, Inglewood | standard | 5179 | Metro Private Car | 1927-28 |
| Hornshfield | J. T. | Carani | Chevrolet Truck | VP ● 98 | Victoria Plains Road Board | 1927-28 |
| Horobin | O. W | Bruce Rock | standard | BK ● 299 | Bruce Rock Road Board | 1927-28 |
| Horonda Brewery | - | Cnr. Hay & Alvan streets, Subiaco | Adam Wagon | 4707 | Metro Private Car | 1924-25 |
| Horonda Water Co | - | Hay Street, Subiaco | Ford Wagon | 9144 | Metro Private Car | 1925-26 |
| Horonda Water Co | - | Hay Street, Subiaco | Ford Wagon | 9144 | Metro Private Car | 1926-27 |
| Horonda Water Co | - | Hay Street, Subiaco | Ford Wagon | 9144 | Metro Private Car | 1927-28 |
| Horowitz | I. | 547 Fitzgerald Street | Indian 7-9 H.P. | P 1150 | Perth Municipality | 1919 |
| Horowitz | I. | 129 William Sreet Perth | Chevrolet | 435 | Metro Private Car | 1924-25 |
| Horowitz | I. | 129 William Street, Perth | Chevrolet | 435 | Metro Private Car | 1925-26 |
| Horowitz | I. L. | 129 William Street, Perth | Chevrolet | 435 | Metro Private Car | 1926-27 |
| Horowitz | Isadore | 129 William Street, Perth | Chevrolet | 435 | Metro Private Car | 1923-24 |
| Horpin | W. S. | 68 Eighth Avenue, Maylands | Chevrolet | 14475 | Metro Private Car | 1927-28 |
| Horracks & Wadham | - | Bat Street, Fremantle | Ford | 1913 | Metro Private Car | 1922-23 |
| Horricks & Wadham | - | Beach Street, Fremantle | Ford Wagon | 12142 | Metro Private Car | 1926-27 |
| Horricks and Wadham Ltd | - | 8 Beach Street, Fremantle | Chevrolet | 4068 | Metro Private Car | 1923-24 |
| Horrocks | E. | 36 York Street, Boulder | Rugby | B 58 | Boulder Municipality | 1927-28 |
| Horrocks | Geo. | Harvey | B.S.A. Motorcycle | H ● 24 | Harvey Road Board | 1922-23 |
| Horrocks | R. | 36 York Street, Boulder | Rugby | B 58 | Boulder Municipality | 1925-26 |
| Horrocks | R. | 36 York Street, Boulder | Rugby | B58 | Boulder Municipality | 1925-26 |
| Horrocks | R. | 36 York Street, Boulder | Rugby | B 58 | Boulder Municipality | 1926-27 |
| Horrocks & Waddam | - | Bay Street, Fremantle | Peerless & Sidecar | 1389 | Metro Motorcycle | 1922-23 |
| Horrocks & Wadham | - | Bay Street | Douglas 2¾ Motorcycle | F 134 | Fremantle Municipal Council | 1917-18 |
| Horrocks & Wadham | - | 49 Ruby Street, North Perth | Douglas 2¾ H.P. Motorcycle | P 729 | Perth Municipality | 1919 |
| Horrocks & Wadham | - | Beach Street, Fremantle | Dodge | 1799 | Metro Private Car | 1924-25 |
| Horrocks & Wadham | - | Beach Street, Fremantle | Ford | 1913 | Metro Private Car | 1924-25 |
| Horrocks & Wadham | - | 10 Beach Road, Fremantle | Chevrolet Wagon | 6043 | Metro Private Car | 1924-25 |
| Horrocks & Wadham | - | Fremantle | Ford | 5004 | Metro Private Car | 1924-25 |
| Horrocks & Wadham | - | 10 Beech Road, Fremantle | Chevrolet Wagon | 6043 | Metro Private Car | 1925-26 |
| Horrocks & Wadham | - | Beach Street, Fremantle | Hupmobile | 6187 | Metro Private Car | 1925-26 |
