| Hatfield | S. H. S. | Kimberley Heights, North Walpole | ZW5 and 39D, 108E | 1962 |
| Hatfielld | G. A. & E. J. | Dleitah, Boddington | GE2 and 31B, 48A | 1962 |
| Hathaway | A. C. & D. A. | Sunnydale, Kweda via Brookton | 9AC and 3B, 10A | 1962 |
| Hathaway | D. J. | 23821, 25792, Bulyee | NH1 and 43D, 43E | 1962 |
| Hathaway | J. H. | Waylands, Bulyee | JH5 and 34B, 54F | 1962 |
| Hathaway & Co | A. J. & R. J. | Ning 1862, 1949, 1888, 1129, Kalannie | AH8 and 30A, 19B | 1962 |
| Hathaway & Co | A. J. & R. J. | Ning 2169, 2168, 1008, Kalannie | HJ1 and 27B, 42A | 1962 |
| Hatherly | J. E. | Kokarrup, Arthur River | 0HP and 11D, 37E | 1962 |
| Hathway | Alfred J. | Over Park, Xantippe, Dalwallinu | AH8 | 1927 |
| Hatten | Thomas | Little Britain, Muchea | TH7 | 1912 |
| Hatten | Thos. | Little Britain, Muchea | TH7 | 1924 |
| Hatton | E. E. | Kent Loc.1407, Gairdner River via Jerramungup | E3H and 38B, 14E | 1962 |
| Hatton | Hy. Wm. | Hillview Farm, Dalwallinu | O9N | 1924 |
| Hatton | Thos. | Sunlight Farm,Goomalling | 1XH | 1912 |
| Hatton | Thos. | Sunlight Farm, Goomalling | 1XH | 1924 |
| Hatty | William | Cundarring, Wagin | 7HY | 1912 |
| Hatty | William | Cundarring, Wagin | 7HY | 1924 |
| Hatwell | M. & A. V. | Gemeleigh, Dowerin | 2HH and 26B, 16E | 1962 |
| Hatwell Bros. | - | Gameleigh, Dowerin | 2HH | 1924 |
| Hatwell Bros. | Jos. Walter | Prydell Farm, Coomberdale | 6JU | 1924 |
| Haub | Mrs A. | Lakeside, Waroona | 3AH | 1924 |
| Haub | Mrs. A. | Lakeside, Waroona | 3AH | 1912 |
| Haub | Otto | Lake View, Waroona | Q0H | 1924 |
| Hauser | E. M. W. | 1295-1763, Ridge Hill | E6H and 19E, 102E | 1962 |
| Haussler | Hans | Gregorfields, Winchester | OH5 | 1924 |
| Haussler & Zuegg | - | Gregorfields, Winchester | IZ5 | 1928 |
| Hawcroft | F. W. | Brooklands Estate, Balingup | O8A | 1924 |
| Hawes | Revd. Jno. C. | Commonage, Yalgoo | 8JX | 1924 |
| Hawke | E. J. | Nelson Locs. 8189, 8186, Pemberton | H9X and 104B, 8A | 1962 |
| Hawke | G. E. | 62 Great Eastern Highway, Belmont | 7HZ and 6A, 9B | 1962 |
| Hawke | Jas. T. | Eyrie, Tambellup | 6HT | 1912 |
| Hawke | Jas. T. | Eyrie, Tambellup | 6HT | 1924 |
| Hawke | K. M. A. | Brookdale Murray 555, 602, 243, 734, 1164, 72, 145, Dwellingup | K7H and 58F, 28B | 1962 |
| Hawker | C. H. D. | Rock Hill Farm, Newcarnie | 2DH | 1912 |
| Hawker | C. H. D. | Rock Hill Farm, Newcarnie | 2DH | 1924 |
| Hawker | E. G. | Marglen, Kendenup | NU6 and 52F, 109D | 1962 |
| Hawker | Walter | Hawthornden, Tooday | U4H | 1912 |
| Hawker | Walter | Hawthornden, Toodyay | U4H | 1924 |
| Hawker | Wm. | Collie | ZW9 | 1924 |
| Hawker, Chomley, & Co., Ltd. | - | Sturt Meadows, Leonora | KY1 | 1925 |
| Hawkes | E. W. | Pigeon Grove, Wonnerup | 8XY | 1924 |
| Hawkes | F. A. | Tarrakul, Gnowangerup | JC8 and 52F, 109D | 1962 |
| Hawkes | Robert | Pemberton | KR4 | 1924 |
| Hawkes | T. J. | Loc. 7948, Pemberton | KR4 | 1962 |
| Hawkes | W. G. | Homestead, Kalgan River | G0H | 1912 |
| Hawkes | W. G. | Homestead, Kalgan River | G0H | 1924 |
| Hawkes | W. G. | The Carroll, Bolgart | HQ8 | 1924 |
| Hawkes | Wilfred | Broome | V7K | 1924 |
| Hawkesford | H. E. | Sussex Loc.1585, Waverley Farm, Cowaramup | HK8 and 108D, 4E | 1962 |
| Hawkesley Bros. | - | Westlands, Narrogin | HO8 | 1912 |
