| Murtha | P. D. | Commonage, Mingenew | 5XL | 1912 |
| Murtha | P. D. | Commonage, Mingenew | 5XL | 1924 |
| Muse | T. G. & J. M. | Victoria 7838, 7835, 83506, 8476, Tefore, Buntine | T2M and 43C, 108A | 1962 |
| Musk | John | Yalobia, via Carnarvon | 1MU | 1912 |
| Musk | John | Yalobia, via Carnarvon | 1MU | 1924 |
| Musk | John (Exrs. of Est. of late) | Leveland, Gingin | OYE | 1924 |
| Muskerry Grazing Co. | - | Muskerry, Northampton | RQ2 and 102C, 10E | 1962 |
| Mussared | Edgar | Westgate Farm,Totadjin | 8XM | 1924 |
| Mussared | G. M. & R. T. | Westgate, Belka | 8XM and 52F, 30D | 1962 |
| Mussared | H. S. | Grazing and Wheat, Cunderdin | H6M and 35B, 84E | 1962 |
| Mussared | R. G | Burtnell and Rikkaka, Cunderdin | MR5 and 19D, 113E | 1962 |
| Mustafa | | Coolgardie G. F. | MU1 | 1912 |
| Mustafa | - | Coolgardie G.F. | MU1 | 1924 |
| Mustica & De Fransesco | - | Ptn. Wellington 28597, Bunbury | M4D and 23B, 6E | 1962 |
| Musto | Khan | Wiluna | M8K | 1912 |
| Musto | Khan | Wiluna | M8K | 1924 |
| Mutch | David | Fern Park, Yarloop | DM2 | 1924 |
| Mutch | L. T. & R. L. | Omega, Esperance | 4RM and 112D, 5E | 1962 |
| Mutchett | D. | Ellensbrook, Muchea | DM9 | 1924 |
| Muteh | David | Fern Park, Yarloop | DM2 | 1912 |
| Mutehett | D. | Ellensbrook, Muchea | DM9 | 1912 |
| Muteroo Pastoral Co. | - | Muteroo, M.1400, M.11900, M.1703, Kalannie | MP8 and 50C, 67E | 1962 |
| Mutimer | A. S. | 1670,via Bussleton | SM9 | 1962 |
| Mutter | G. & F. | Bergala, Muchea | GM3 and 32D, 117E | 1962 |
| Mutter | J. H. | Canternatting, Northam | 3MY | 1925 |
| Mutter | R. H. | Williams 6818, 9031, Dumbleyung | 1RM and 3E, 13D | 1962 |
| Mutter | W. K. | Noalimba Dudawa, Arrino | M5M and 4B, 28E | 1962 |
| Muttinson | W. S. | Glenalbon, Collie | 3UM | 1924 |
| Mutton | A. H. & M. | Fieldhouse Farm, Wickepin | BC7 and 29B, 25E | 1962 |
| Mutton | Arthur R. | Perserverance Farm, Box 26, Wickepin | AM0 | 1927 |
| Mutton | C. A. & E. S. | Bibblin Farm, Wickepin | BC7 and 29B, 25E | 1962 |
| Mutton | G. A. | Commonage, Lawlers | GM6 | 1912 |
| Mutton | G. A. | Commonage, Lawlers | GM6 | 1924 |
| Mutton | H. A. | Olive Vale Farm, Dumbleyung | 8HM | 1912 |
| Mutton | H. A. | Olive Vale Farm, Dumbleyung | 8HM | 1924 |
| Mutton | H. D. | 55 River Road, Kelmscott | 2UM | 1962 |
| Muzzucchelli | H. H. | Avon, York | H3M | 1912 |
| Muzzucchelli | H. H. | Avon, York | H3M | 1924 |
| Mycock | J. P. | Roselea, Kukerin | JM3 and 28B, 15A | 1962 |
| Mycock | Joseph M. | Bladon Dale, Springhurst Mail, East Wagin | 8JQ | 1924 |
| Mycock | W. E. & T. J. | Bladondale, Kukerin | 8JQ and 31B, 18A | 1962 |
| Myers | A. | Duntram, Newcastle | A8M | 1912 |
| Myers | A. | Duntram, Toodyay | A8M | 1924 |
| Myers | Amy Maria | Reserve, Donnybrook | VM9 | 1924 |
| Myers | F. G. | Myeralla, Wubin | 3UF and 43E, 15B | 1962 |
| Myers | Fred. | Myeralla, Wubin | 3UF | 1924 |
| Myers | G. W. (Mrs) | Idridgehay Park, Muradup | ZS9 and 107A, 32C | 1962 |
| Myers | Oswald Louis | Rayak, Yearlering | HH0 | 1927 |
| Myers & Chambers | Sidney Geo. & Geo. F. | Avon Loc. 17639, Corrigin | Y8U | 1924 |
| Myers & Co | H. | 4903, 19 Wubin | H9M and 26B, 106E | 1962 |
