| Maffescoine | A. | 2839, 1478, Bullsbrook | 0MA and 14E, 103D | 1962 |
| Mafriei | p. | Loc. 29, Brunswick Junction | P5M and 14D, 103E | 1962 |
| Magagnotti | F. | Fitz. Loc. 470 and 898, Kumarl | FM8 and 14B, 119E | 1962 |
| Magagnotti | Frank | Fitz. Locs. 470 & 898, Dowak | FM8 | 1926 |
| Magagnotti | W. J. | 347, 580, 1433, Kumarl Siding | W6M and 47B, 11E | 1962 |
| Magee | B. | Location 1071-2,, and Townsite, Kulin | M9X | 1924 |
| Magee | J. O. & E. M. | Jesmond, Kulin | MG6 and 7C, 27A | 1962 |
| Magee | M. E. & J. A. | Weeine, Northampton | MJ0 and 17D, 14E | 1962 |
| Magee | R. | 2365, 1682, 2647, Northampton | RM4 and 22B, 36E | 1962 |
| Magenta | G. | 890, Greenbushes | 1MT | 1962 |
| Magher | W. J. | Location 21608, Dangin | XI5 | 1924 |
| Magill | William Arthur | Lease No. 16343/68, Buckinghams P.O., via Collie | AQ8 | 1925 |
| Magini | S. | 4721, 7661, Kojonup | 4SV and 31D, 113E | 1962 |
| Magistro | D. L. & A. E. | Lot 125, Pt. Lots 123-4 and 12 and 13, Kelmscott | D3M and 41B, 67A | 1962 |
| Magner | John Thos. | Ongerup | TN7 | 1924 |
| Magnolia Farms Pty. Ltd. | - | Murray 896, 1016, 881, 288, Ptn. 740, Pinjarra | M7N and 84B, 36A | 1962 |
| Magnussen & Carlson | - | Vermont Dale, Kondinin | M3V | 1924 |
| Magor | Gordon A. | Locations 211-2, Meekatharra | 4PX | 1924 |
| Magowan | C. H. | Homebush Farm, Thompson's Brook | OM4 | 1924 |
| Magowan & Sons | C. W. | Yarrabin, Balkuling | OM4 and 50A, 11B | 1962 |
| Magri | J. | Yilgarn Locs. 335-6, 380, Boodarockin, via Westonia | J4M and 47A, 25B | 1962 |
| Maguire | James | Brookside, Narrogin | MJ6 | 1912 |
| Maguire | James | Brookside, Narrogin | MJ6 | 1924 |
| Maguire | James jun. | Homestead, Brunswick | 1JY | 1912 |
| Maguire | James Junior | Homestead, Brunswick | 1JY | 1924 |
| Maguire | Jos. Jas. | Turell Station, Peak Hill | OJ2 | 1924 |
| Maguire | Michael J. | Kurrawang | M0O | 1924 |
| Mahar | H. W. | 4598 William District, Yealering | 7HM and 31B, 71E | 1962 |
| Mahar | J. T. & R. P. | Brookhills, New Norcia | R6M and 22E, 47B | 1962 |
| Mahar | l. D. & F. L. | Queerearrup Park, Wagin | 6LF and 110D, 43E | 1962 |
| Mahar | M. A. | Granite Rock, Yealering | M5M and 29B, 102E | 1962 |
| Mahar | Martin | Seven Oaks, Malyalling | 7YM | 1924 |
| Mahar | S. R. | Locs. 22223-4, Dukin | S0M and 8B, 102E | 1962 |
| Mahar | T. | Boyanup Loc. 315 and 314, Bunbury | M0T and 46C, 32A | 1962 |
| Mahar | W. | Boulder Hill, Yealering | 9WM and 16C, 11E | 1962 |
| Mahar | Wm. | H. F. 4604874 East Narrogin | 9WM | 1912 |
| Mahar | Wm. | H.F. 46048/74, East Narrogin | 9WM | 1924 |
| Mahar Bros. | - | Golden Valley, Yealering | AM1 and 7E, 5D | 1962 |
| Maher | James | Depot Hill, Strawberry | J1A | 1912 |
| Maher | James | Depot Hill, Strawberry | J1A | 1924 |
| Maher | John | Spring Grove, Northampton | JM6 | 1926 |
| Maher | Martin | Avon Location 15600, Nangeenan | M6Q | 1924 |
| Maher | Michael Patrick | Waranga, East Tambellup | VM1 | 1924 |
| Maher | P. J. | Common, Meekatharra | 2PM | 1912 |
| Maher | R. | Bruke Hill, New Norcia | R6M | 1912 |
| Maher | R. | Bruke Hill, New Norcia | R6M | 1924 |
| Maher & Carter | - | Pin Town Farm, Nangeenan | M6N | 1912 |
| Mahlberg | Andrew | Lots 68-9-70 and 74, Boyanup | O8M | 1924 |
| Mahlstedt | Fred G. | Slaugter House, Wagin West | NF8 | 1924 |
| Mahmert | Paul | Ivanhoe, Balingup | 5PM | 1924 |
