| Hipper | Wm. | Wattle Farm, Northampton | 0HR | 1924 |
| Hipper & Co. | - | Indialla, Nabawa | HC5 and 80B, 5E | 1962 |
| Hird | Thos. | Melrose Farm, Cunderdin | HZ1 | 1912 |
| Hird | Thos. Jos. | Melrose, Cunderdin | 1TH | 1912 |
| Hird | Thos. Jos. | Melrose, Cunderdin | 1TH | 1924 |
| Hird | Thos. Jos. | Melrose, Cunderdin | HZ1 | 1924 |
| Hird | W. J. | Avon Loc. 2218, Cunderdin South | UX7 | 1924 |
| Hird & Sons | D. M. | 249, Cunderdin | HZ1 and 58F, 8D | 1962 |
| Hird Bros. | - | Dumbleyung | BH0 | 1924 |
| Hirsch | A. S. & A. E. | Gnarlbini, Latham | EH0 and 21E, 44C | 1962 |
| Hirschaner | E. | Manna Farm Perenjori | KE9 | 1924 |
| Hirshfeld | T. J. | M. 1725, yericoin | LH9 and 13D, 106E | 1962 |
| Hirsohn | L. | Turkey Creek, | LH7 | 1912 |
| Hirsohu | L. | Turkey Creek | LH7 | 1924 |
| Hiscock | Arthur | Bulga, Albany Road, Cannington | 1AH | 1928 |
| Hiscock | Herbert S. | Nelson Loc. (Springvale), Dinninup | 9KD | 1925 |
| Hiscox | Geo. | Grandstand Road, Belmont | B1O | 1924 |
| Hiscox | Geo. Jas. | Rosedale, York | JH2 | 1912 |
| Hiscox | Geo. Jas. | Rosedale, York | JH2 | 1924 |
| Hiscox | Lilly | Grove Farm, Belmont | L0H | 1924 |
| Hiscox | Lily | Grove Farm, Belmont | L0H | 1912 |
| Hiscox & Son | | Aloma, Gabbin | 2HX and 47A, 17B | 1962 |
| Hislop | F. K. | Lake View, Katanning | 0FK and 17D, 113E | 1962 |
| Hitchcock | A. H. | Malabaine, Northam | H6K and 37B, 22A | 1962 |
| Hitchcock | A. J. | Warradong, Meckering | HX8 and 45D, 6E | 1962 |
| Hitchcock | E. D. N. | Avon 4165, 4166, 14656, 1038, 4494, Meckering | D4H and 21C, 36E | 1962 |
| Hitchcock | E. G. | Wattleup, Naval Base | E3G | 1962 |
| Hitchcock | F. W. | Malabaine, Northam | F2H | 1912 |
| Hitchcock | H. E. F. | Mallabaine, Northam | H6K | 1912 |
| Hitchcock | Henry | Loc. 14, Midland Junction | VHG | 1924 |
| Hitchcock | J. A. | 21892, 19801, Corrigin | 9JA and 49C, 40E | 1962 |
| Hitchcock | J. W. | Carterville, Meckering | F2H and 11C, 58F | 1962 |
| Hitchcock | J. W. H. | Lesterfield, Bowes Siding | K7H | 1912 |
| Hitchcock | L. C. E. | 1466, 2173, 621, Malabaine, via Northam | R0H and 19A, 22C | 1962 |
| Hitchcock | N. F. C. | Avon Locs. 2685, 3179, 3253, Grass Valley | NH9 and 107A, 22B | 1962 |
| Hitchcock | R. C. | Malabine, Northam | R0H | 1912 |
| Hitchcock | W. L. | Calgie, York | L5H | 1912 |
| Hitchcock & Son | V. T. W. | Pynup, Cranbrook | 3FH and 21C, 19E | 1962 |
| Hitchcock Bros. | - | Blackeston, Cunderdin | 4HT and 38B, 35E | 1962 |
| Hitchins | F. S. | Mernda, Blackwood Road, Mt. Barker | 3FH | 1912 |
| Hitsert | J. | 6069, Gnowangerup | J2H and 21A, 19C | 1962 |
| Hitzert | G. | 6071, Gnowangerup | GH9 and 29B, 106E | 1962 |
| Hoad | C. S. | Swan Loc. 1352, Bullsbrook | 3CH and 10A, 32B | 1962 |
| Hoar | Henry | Connewarre, Nungarin | 0UH | 1924 |
| Hoar | Jonathan | Targain, Watheroo | H6J | 1912 |
| Hoar | Jonathan | Targain, Watheroo | H6J | 1924 |
| Hoare | H. L. J. | Lanaubra, Nungarin | 8HL and 25D, 42E | 1962 |
| Hoare | Jas. | Lenanbra, Nangeenan | 8HL | 1912 |
| Hoare | Jas. | Lananbra, Nanageenan | 8HL | 1924 |
| Hoare | W. | Avon Loc. 19158, Ardath | 9WZ | 1924 |
