| Muir | R. W. | 3764, 9425, Palgarup | OX7 | 1962 |
| Muir | Raymond R. | Woodgreen, Seaton Villa, Manjimup | V1L | 1926 |
| Muir | Robert | Fern Hill, Balbarrup | 1OV | 1924 |
| Muir | Robert T. W. | Forest Hill, Mt. Barker | R4M | 1926 |
| Muir | Robt. | Fern Hill, Balbarrup | 1OV | 1912 |
| Muir | Robt. F. | Seaton Ross, Balbarrup | XF1 | 1912 |
| Muir | Robt. F. | Seaton Ross, Balbarrup | XF1 | 1924 |
| Muir | Ronald | St. Arnaud's, Chidlows | 7RU | 1924 |
| Muir | T. | Forest Hill, Mt. Barker | MU0 | 1926 |
| Muir | T. B. | 7954-5, Manjimup | 1OV and 10D, 35E | 1962 |
| Muir | T. W. | Deeside, Manjimup | T2M and 33D, 15E | 1962 |
| Muir | T. W. & A. | Riverside, Manjimup | 4DC and 2C, 15E | 1962 |
| Muir | Thos | Deeside, Balbarrup | T2M | 1924 |
| Muir | Thos. | Deeside, Balbarrup | T2M | 1912 |
| Muir | W. C. | Fernslope, Manjimup | 1XZ and 4D, 47E | 1962 |
| Muir | W. E. | Lake Muir, Manjimup | 1XV and 14C, 23E | 1962 |
| Muir | W. P. | Palgarup, Manjimup | W4M | 1962 |
| Muir | W. R. | Wood Green, Manjimup | U6R | 1924 |
| Muir | Walter Creswell | Fernslope, Balbarrup, via Bridgetown | 1XZ | 1924 |
| Muir | Wm. Clifton | Lake Muir, via Manjimup | 0ZY | 1924 |
| Muir | Wm. P. | Lake Muir, Balbarrup | W4M | 1912 |
| Muir | Wm. P. | Lake Muir, Balbarrup | W4M | 1924 |
| Muir & Gill | | Wellington Mills, Wellington | MG7 | 1912 |
| Muir & Gill | - | Wellington Mills, Dardanup | MG7 | 1924 |
| Mulcahy | Daniel | Milly Milly, via Yalgoo | U7Y | 1924 |
| Mulcahy | E. M. | 11906, 14906, 2266615515-6, 15367-8, 15520, Trayning | NE6 and 25B, 26E | 1962 |
| Mulcahy | G. & T. D. | 15515-6, 15367-8, 15520, Yelbeni | DP9 and 103D, 8E | 1962 |
| Mulcahy | J. O. & S. M. | Lauriston, Bilbarin | 6LS and 111B, 43A | 1962 |
| Mulcahy | Michael | Kelly's Stables, Claremont, Belmont | 0XE | 1924 |
| Mulcahy | P. F. & M. L. | Kingswell, Yelbeni | 7KA and 12B, 113E | 1962 |
| Mulcahy | Thos. Jos. | Kingswell, Yelbeni | 7KA | 1924 |
| Mulcahy Bros. | | Milly Milly, Yalgoo | 1DD | 1912 |
| Mulcahy, Est of D. | - | Milly Milly, via Cue | U7Y and 3D, 6E | 1962 |
| Muldoon | A. A. | Brooklyn, Roelands | AM8 | 1912 |
| Muldoon | A. A. | Brooklyn, Roelands | AM8 | 1924 |
| Muldoon | A. L. | Maryborough, Mundaring | JM1 and 30B, 106E | 1962 |
| Muldoon | Albert L. | Braeside, Yarloop | 4JH | 1924 |
| Muldoon | D. W. | 2556 Ninghan, Kalannie | DM1 and 29D, 31E | 1962 |
| Muldoon | T. H. | Emanon, Trayning | 7TM and 119A, 34C | 1962 |
| Mulga Down Pty. Ltd. | - | Mulga Downs, via Roebourne | MD2 and 102D, 38E | 1962 |
| Mulga Downs, Ltd. | - | Mulga Downs, via Roebourne | MD2 | 1924 |
| Mulgrave | Joseph | Commonage, Busselton | 3MU | 1924 |
| Mulgul Station Co. | - | Mulgul Station, via Meekatharra | Q8P and 5A, 116B | 1962 |
| Mulhall | Joseph | Balla Finn, Cunderdin | M5L | 1912 |
| Mulhall | Joseph | Balla Finn, Cunderdin | M5L | 1924 |
| Mulkerin & Richardson | - | Bohemia Downs Station, West Kimberley | Y2T | 1926 |
| Mulla | Said Ahmad | Mt. Sir Samue | SA3 | 1912 |
| Mulla Said Ahmad | - | Mt. Sir Samuel | SA3 | 1924 |
| Mullaly | E. | Avonmore Pingelly | EM5 | 1912 |
| Mullaly | E. | Avonmore, Pingelly | EM5 | 1924 |
