| Harrod | G. E. | Bethney, Brunswick Junction | Z1H | 1962 |
| Harrod | J. | Kathleen Vale, Brunswick Junction | J4H and 56F, 33D | 1962 |
| Harrod | John | Kathleen vale, Kununoppin | J4H | 1928 |
| Harrod | L. H. J. | Will. 15032, Boddington | HL9 and 109B, 110A | 1962 |
| Harrold | Edmond | Mokine Park, Mokine | 2EZ | 1924 |
| Harrold | N. G. | Naranio, Pinjarra | N3H and 36B, 105A | 1962 |
| Harrold & Magner | - | Mokine Park, Mokine | 7XJ | 1924 |
| Harrop | Catherine | Hill Farm, Cunderdin | C8S | 1912 |
| Harrop | Catherine | Hill Farm, Cunderdin | C8S | 1924 |
| Harrop | G. H. | Commonage, Northam | GH3 | 1912 |
| Harrop | G. H. | Commanage, Northam | GH3 | 1924 |
| Harrop | R. L. | 1085 & 1317, Ongerup | 6RL and 25B, 120E | 1962 |
| Harrop | S. R. | Kent 1316 &354 Thisllyo, Ongerup | SH5 and 40E, 71D | 1962 |
| Harry | Arthur | Roath Lake FArm, Lot 349, Ongerup | 9HX | 1924 |
| Harslett | Edwin Henry | M.H. L. 14, Prinsep Street, Norseman | UQ7 | 1925 |
| Harsley | W. H. | Many Water, Redmond | 7MA | 1962 |
| Harstedt | A. J. | Wickepin, Narrogin | A6H | 1912 |
| Harstedt | A. J. | Wickepin, Narrogin | A6H | 1924 |
| Hart | A. & R. K. | Park Ville, Dangin | RX8 | 1924 |
| Hart | A. J. | Avon Loc. 15182, Merridin | UH9 | 1924 |
| Hart | A. J. | Avon Loc. 15182, Nukarui | UH6 and 29A, 42B | 1962 |
| Hart | Alfred | Northampton, Victoria District | A4H | 1912 |
| Hart | Alfred | Northampton, Victoria District | A4H | 1924 |
| Hart | Dan | Princess Rosa, Norseman | DH3 | 1912 |
| 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 |
