| Hart | Dan | Princess Rosa, Norseman | DH3 | 1924 |
| Hart | Eli | Brookside, Cuballing | HU8 | 1912 |
| Hart | Eli | Brookside, Cuballing | HU8 | 1924 |
| Hart | Emma | Sherwood Lodge, Cannington | H5Q | 1924 |
| Hart | F. G. | Karrihill, Northcliffe | 3ZH and 80A, 12B | 1962 |
| Hart | Fredk. Wm. | Oakleigh Grange, Cuballing | 1QH | 1924 |
| Hart | J, J, G. | Locs. 1662, 1586, Metricup | 9HT | 1962 |
| Hart | J. | McAlinden, Collie | X3H and 17B, 67E | 1962 |
| Hart | John | Yearley Bank,Chittering | HJ3 | 1912 |
| Hart | John | Yearling Bank, Chittering | HJ3 | 1924 |
| Hart | L. E. K. & A. | Kurana, Ongerup | WX1 and 48A, 2C | 1962 |
| Hart | M. J. & B. | Rosehill & 1486, Manjimup | D1U and 42B, 106A | 1962 |
| Hart | R. | Locs. 3191, 2106, 3052, Metricup | RH7 | 1962 |
| Hart | R. J. | 240, Pinjarra | QU3 and 113B, 120A | 1962 |
| Hart | R. S. | 1152, Augusta | ZH3 | 1962 |
| Hart | Reginald H. | Eastward, Corrigin | QU3 | 1925 |
| Hart | Rowley | Metricup | RH7 | 1928 |
| Hart | T. G | Chowringee, Ongerup | G0H and 39D, 55F | 1962 |
| Hart | Thomas | Hollingwood, Jingalup, Kojonup | 9ZO | 1926 |
| Hart | W. H. | The Heights, Narrogin | HY4 | 1912 |
| Hart | W. H. | The Heights, Narrogin | HY4 | 1924 |
| Hart & McKay | H. & P. | Regina Stud, Balcatta | X9H | 1962 |
| Hart & Sons | - | Myrniong Farm, Blackwood Raod, Kojonup | 2ZH | 1924 |
| Hart & Sons | - | Loc. Nos. 2776, 2779-80, Kulikup | 2NH | 1962 |
| Hart Bros. | - | Yearby, Chittering | HB4 | 1927 |
| Hart Bros. | - | Yearby Bank, Chittering | HJ3 and 40D, 21E | 1962 |
| Harte | T. A. | Coolup 197, Pinjarra | 6TH | 1962 |
| Hartley | A. | Springholm, Newdegate | XH5 and 48B, 84E | 1962 |
| Hartley | Albert | Katanning | XH5 | 1924 |
| Hartley | Albert E. | Avon Loc. 21829, Gorge Rock | V4Y | 1924 |
| Hartley | D. H. | Nethercote, Corrigin | LY9 and 4D, 42E | 1962 |
| Hartley | J. | Hensingham Farm, Burekup | 8JH and 84B, 18E | 1962 |
| Hartley | J. E. | Avondale Farm, Corrigin | 9EY | 1924 |
| Hartley | James | Banjee, Corrigin | NH5 | 1924 |
| Hartley | John M. | Nethercote, Gorge Rock, via Corrigin | LY9 | 1924 |
| Hartley Bros. | (E. & B) | 925/ 1266, 1182, Lake Biddy | H7B and 111E,10C | 1962 |
| Hartnett | Denis | Orpha Farm, East Pingelly | QH7 | 1924 |
| Hartnett | F. G. | Greenacres, airdale via Margaret River | 5HG and 108D, 104E | 1962 |
| Hartnett | Mary | Dardanup | MH9 | 1912 |
| Hartnett | Mary | Dardanup | MH9 | 1924 |
| Hartnett & Sons | T. H. | 8295 and 8296, Cundinup via Nannup | B6H and 106B, 110A | 1962 |
| Hartnup | G. H. | 2432, 4119, Karridale | G3H and 31D, 32E | 1962 |
| Hartwell Bros. | - | Gameleigh, Dowerin | 2HH | 1912 |
| Hartzer | C. J. | Forest Grazing, Greenbushes | 1HZ | 1962 |
| Haruzan | Uzonoe | Lawlers, East Murchison | HU2 | 1912 |
| Haruzan | Uzunoe | Lawlers, East Murchison | HU2 | 1924 |
| Haruzan & Khan | Uzunoe & Hyat | Commonage, Lawlers | UH3 | 1924 |
| Harvey | A. E. | Nobels Bridge and Le Sarr, Arthur River, West Wagin | 7AY and 113B, 8A | 1962 |
| Harvey | Arthur | Noblebridge Farm, Arthur River | 7AY | 1924 |
| Harvey | B. | Jilbadji 509, 510 and 515, Moorine Rock | 6BH and 39B, 20A | 1962 |
