| Quartermaine | W. F. | Spring Hill, Badgemennip, Katanning | WQ7 | 1912 |
| Quartermaine | W. F. | Spring Hil, Badgenennip, Katanning | WQ7 | 1924 |
| Quartermaine | W. W. | Mea Mahn, Katanning | W7Q and 40D, 15E | 1962 |
| Quartermaine | Walter Wm. | Mean Mahn, Katanning | W7Q | 1924 |
| Quartermaine & Bros. | - | Bridgeclose, Waroona | QB0 | 1924 |
| Quartermann | H. E. | Margenup, Nyabing, East Katanning | AQ1 | 1924 |
| Quick | H. & D. | Avon 4194, 5085, 2233, 11567-8, 13413, 13870-1, 21511, Jennacubbine | Q3S and 118D, 46E | 1962 |
| Quick | Percival J. | Cunderdin | P3J | 1927 |
| Quick | R. & J. | Brae Leigh, Nokaning | RQ1 and 49D, 16E | 1962 |
| Quick & Son | H. J. | Whitebridge, Kirup | HQ1 and 9D, 40E | 1962 |
| Quicke | A. C. & J. C. | Avon Loc. 22478, Lake Jilakin | NY6 | 1924 |
| Quigley | John | Perth Milk Supply, Belmont | JQ0 | 1912 |
| Quigley | John | Millar's Lease, Worsley | JQ7 | 1912 |
| Quigley | John | Perth Milk Supply, Belmont | JQ0 | 1924 |
| Quigley | John | Millar's Lease, Worsley | JQ7 | 1924 |
| Quike | A. C. | Woodlands, Wagin | NY6 and 13C, 39A | 1962 |
| Quike | E. C. | Wandoo, Wooroloo | E1Q and 36D, 103E | 1962 |
| Quike | J. C. & A. D. | Albany 449, 1932, 5322, Albany | J4Q and 25D, 44E | 1962 |
| Quike & Co. | J. C. | Williams 8947-8 Kulana, Kulin | 7JQ and 19B, 50A | 1962 |
| Quill | D. | Ptn. Loc. 880, Collie | Q3U and 17D, 13E | 1962 |
| Quill | Daniel | Duranillin | Q3U | 1925 |
| Quill | J. | 3428, 1974, Pt. 1691, 3455, 1812, Duranillin | JQ1 and 4B, 106A | 1962 |
| Quill | J. T. | Rock Pool, Duranillin | J7Q | 1924 |
| Quill | Mrs Mary | May Park, Darkan | 1MQ | 1924 |
| Quill Bros. | - | May Park, Bokal | 1MQ and 35B, 11A | 1962 |
| Quilty | E. M. | Lansdowne Station, Derby | JE6 and 30D, 25E | 1962 |
| Quilty Bros. | (Thos. T. J. P. R. T.) | Bedford Downs, East Kimberley | BD7 | 1924 |
| Quilty Bros. | - | Bedford Downs, Halls Creek | BD7 and 24D, 24E | 1962 |
| Quilty Bros. | T. T. J. & J. R. J.) | Idamere Downs, East Kimberley | KG2 | 1924 |
| Quin | Gerald | Wittenoon Street, Collie | GQ2 | 1924 |
| Quindlan | H. A. | Broadacres, South Stirling | HQ1 and 15D, 104E | 1962 |
| Quinlan | J. W. | Hamilton Hill | 7QO | 1924 |
| Quinlan | John | Hamilton Hill | 7OQ | 1924 |
| Quinlan | P. | Canning Loc. 301, Wattle Grove | QU7 | 1962 |
| Quinlan | P. P. | Knockvalla, Beverley | PQ1 | 1912 |
| Quinlan | T. F. | Hawthornden, Newcastle | QT1 | 1912 |
| Quinlan | T. F. | Hawthornden, Toodyay | QT1 | 1924 |
| Quinn | A. J. | Spring View, 10208, Walpole | 1JO | 1962 |
| Quinn | Amelia | Bull's Brook, Upper Swan | 1QS | 1912 |
| Quinn | Amelia | Bull's Brook, Upper Swan | 1QS | 1924 |
| Quinn | C.G. | Gairdner Ranch, Gairdner River, via Jerramongup | CQ1 and 19C, 111E | 1962 |
| Quinn | D. K. | Boorala, Serpentine | J6U and 46B, 108A | 1962 |
| Quinn | Daniel | Vic. Loc. 51, Yandanooka | 7LQ | 1924 |
| Quinn | Hannah E. | Pine Avenue and Rocky View, E. Brookton and Aldersyde | FO4 | 1924 |
| Quinn | J. | Dairy, Highgate Hill | QJ7 | 1924 |
| Quinn | James | Ballaguin, Narrogin | JQ6 | 1912 |
| Quinn | James | Ballaguin, Narrogin | JQ6 | 1924 |
| Quinn | Jas. | Williams | J1Q | 1924 |
| Quinn | John J. | Mukinbudin | J2Q | 1927 |
| Quinn | Joseph | Jarrahwood | JQ2 | 1926 |
