| Mews & Wimbridge | - | Bango and Gabanintha, Murchison | M5W | 1912 |
| Mews & Wimbridge | - | Hillview, Gabanintha, Murchison | 6OO | 1924 |
| Mews & Wimbridge | - | Wolga Gunga, Nannine | P3G | 1924 |
| Meyer | D. H. | Stirling Estate, Capel | D3M | 1912 |
| Meyer | D. H. | Stirling Estate, Capel | D3M | 1924 |
| Meyer | Geo. | Old Donnybrook, Donnybrook | MO9 | 1924 |
| Meyer | Henry | Block 135, Lansdowne Estate, Kidman Avenue South Guildford | MY4 | 1924 |
| Meyer | R. | Peel Estate 449, Wellard | 6MR and 58F, 32D | 1962 |
| Meyer & Co. | G. F. | Bloomfield, Broomhill | MY7 and 28C, 32A | 1962 |
| Meyers | F. C. | Hotel, Bencubbin | F9U | 1924 |
| Mia Mia Pastoral | - | Mia Mia, Carnarvon | M1N and 1C, 120A | 1962 |
| Mia Mia Pastoral Co. Ltd. | - | Mia Mia, Carnarvon, St. George's Terrace, Perth | M1N | 1925 |
| Michael | E. R. & L. J. | Kojonup 2143 (Laurie Gleam), Mauradup | EL2 and 114B, 26E | 1962 |
| Michael | H. G. | Rotherwood Cranbrook | 9MY and 12A, 39C | 1962 |
| Michael | Harry Geo. | Rothorwood, Slab Hut Mail, via Kojonup | 9MY | 1924 |
| Michael | J. I. | Stanley Park, Moora | S9P | 1927 |
| Michael | L. G. & I. E. | Irwin River Station, Mingenew | ML4 and 3B, 30A | 1962 |
| Michael | R. W. & M. L. | Wangoola, Piawaning | RM2 and 35B, 40A | 1962 |
| Michalanney | A. C. & M. M. | Lots 47-8, 182, Lot 3 Kojonup Loc. 4984 and pt. 4985, 4983, 4982, Katanning | C9M 35B, 37A | 1962 |
| Michel | E. H. & G. | Booylgoo Springs Station, Sandston | 4MX and 25A, 6C | 1962 |
| Michel | Mrs I. M. | Southernwood, Gosnells | 4MX | 1924 |
| Micheledes | E. L. (Mrs) | Bushells Farm, Northam | 6ME | 1962 |
| Michelides | E. & R. | Nelson 9801-2, 8151, 7598, 6847, 7295, 2193, Pemberton | 4EM and 59F, 14B | 1962 |
| Michelids Ltd. | - | Nelson Locs. 465, 5977, 9039, 6183, 9771, 8225, 8228, 3826, Manjimup | X4M | 1962 |
| Mickan | H. E. & L. E. | Dalkey M. 411 & M. 591, Walebing | HM7 and 13B, 8A | 1962 |
| Micke | E. K. E. | Sunny Crest, Canna | 6EK and 15D, 107E | 1962 |
| Micke | G. G. | Glen View, Canna | 4GM and 28B, 43E | 1962 |
| Micke | H. J. & E. J. | Wongulla and Mungarra, Canna | HJ3 and 38B, 71A | 1962 |
| Micke | R. J. | Wongalee 8609, 9300, 8216, Canna | R2M and 113A, 28C | 1962 |
| Mickelsons | A. & Z. | 2255 and 2492, North Collie | AM4 and 43E, 12B | 1962 |
| Mickle | Wm. | Doddum, Narrogin | D6M | 1924 |
| Middalya Pastoral Co. | - | Middalya Station, Carnarvon | DH6 | 1924 |
| Middalya Pastoral Co. | - | Middalya Station, Carnarvon | DH6 and 20C, 10E | 1962 |
| Middleton | A. | Block No. 16418, Corrigin | AM3 and 47D, 114E | 1962 |
| Middleton | A. | Town Lot. 66-7-8, Noggerup | SD9 and 43C, 31E | 1962 |
| Middleton | A. W. | Hillside Farm, Wickepin | QM4 | 1924 |
| Middleton | Jas. | View Farm, Wickepin | 2XA | 1912 |
| Middleton | Jas. | View Farm, Wickepin | 2XA | 1924 |
| Middleton | John | Block 10892/74, Warren | JM7 | 1912 |
| Middleton | John | Block 10892/74, Warren | JM7 | 1924 |
| Middleton | Matthew | Fernielee, Kojonup | M1D | 1926 |
| Middleton | N. | 19502, 19807-8, Corrigin | NM8 and 32D, 26E | 1962 |
| Middleton | Norman | Newholm, Kulin, 86 Gate, Wickepin | NM8 | 1924 |
| Middleton | R. | Balingup | 3RM | 1912 |
| Middleton | R. | Balingup | 3RM | 1924 |
| Middleton | R. H. | Broomefield, Northam | 2RM | 1912 |
| Middleton | R. H. | Broomfield, Northam | 2RM | 1924 |
| Middleton | R. H. | Zamia, Bakers Hill | 2RM and 28B, 38E | 1962 |
| Middleton | T. | Block 374, Denmark | T3M | 1912 |
| Middleton | T. | Block 374 Denmark | T3M | 1924 |
