| Lyons | T. G. | Yilgarn, Warralakin | LZ7 and 30A, 23B | 1962 |
| Lyons | Victor | Riverbend, Argyle | V5Y | 1924 |
| Lyons | W. E. | Homebush, Dangin | 5LY | 1924 |
| Lyons River Ltd. | - | Lyons River Station, Carnarvon | 3UP and 18E, 67D | 1962 |
| Lysaght | F. H. & P. M. | 1475, 1483-4, Gabbin | UQ3 and 24B, 113E | 1962 |
| Lyster | G. R. | Locs. 460, 546, Jarrahdale | 2RL and 9B, 107A | 1962 |
| Lyth | Harold Angus | Lower Kalgan, Via Albany | LY4 | 1924 |
| Maasa | Haji | Skeleton, near Flea Pool, via York | 5SH | 1912 |
| Maasa | Haji | Skeleton, near Flea Pool, Via York | 5SH | 1924 |
| Mabey | H. E. | Wavertree, Bridgetown | S5M | 1962 |
| Mable | Thos. | Locations 262 and 269, Ongerup | 2TX | 1924 |
| Mableson Bros. | - | Location 11925, Kelerberrin | M2U | 1924 |
| Mableson Bros. | - | Waukaringa, Doodlakine | D4J and 20C, 11E | 1962 |
| Macale | John jun. | Springfield, Turkey Creek | QQ8 | 1912 |
| Macale | John Junior | Springfield, Turkey Creek | QQ8 | 1924 |
| Macale | W. & McGregor A. | Bow River, Turkey Creek | T8T | 1912 |
| Macale | Walter | Springfield, O'Donnell River | 3ZT | 1912 |
| Macale | Walter | Greenvale, Turkey Creek | 0WZ | 1924 |
| Macale | Walter | Springfield, O'Donnell River | 3ZT | 1924 |
| Macale & McGregor | W. & A. | Bow River, Turkey Creek | T8T | 1924 |
| Macale & Rhatigan | - | Turkey Creek | MR0 | 1912 |
| Macale & Rhatigan | - | Gilbourning Downs, Turkey Creek | VZ8 | 1912 |
| Macale & Rhatigan | - | Turkey Creek | MR0 | 1924 |
| Macale & Rhatigan | - | Gilbourning Downs, Turkey Creek | VZ8 | 1924 |
| Macallum | W. M. | Bendigo Farm, Cuballing | W2M | 1912 |
| Macalpine | G. D. | Neridup 112, Gibson | GD9 and 67B, 40A | 1962 |
| Macansh Estates Ltd. | - | Callangade, La Grange Bay | 3ZZ | 1924 |
| Macansh Estates Ltd. | - | P/L 591/98, La Grange Bay | TU2 | 1924 |
| Macansh Estates Ltd. | - | Anna Plains Station, La Grange Bay | ZP0 | 1924 |
| MacArthur | John | Location 5163, Jarnadup | X4A | 1924 |
| Macassar | Blato | Moonyoonooka via Geraldton | 5BM | 1912 |
| Macassar | Blato | Moonyoonooka | 5BM | 1924 |
| Macaulay | D. A. | Margaret Station. Hall's Creek | MD1 | 1912 |
| Macaulay | J. | Murello Stud, Chidlows | JF6 and 102D, 27E | 1962 |
| Macaulay | J. H. C. | Murello Downs, Cuballing | VP1 and 7A, 5B | 1962 |
| Macauley | D. A. | Margaret Station, Hall's Creek | MD1 | 1924 |
| MacBain | A. & M. S. | Lillydale, Kellerberrin | 2MA and 19B, 29E | 1962 |
| MacBolt | M. & N. | Homefield Farm, Doodlakine | M2M and 12A, 1C | 1962 |
| MacBride | Lucien Victor Ney | Nelson Loc. 8119, Brooklands, Balingup | QY9 | 1925 |
| MacColl | D. A. & A. B. | Glengarry, Narembeen | MK0 and 59F, 10C | 1962 |
| MacDonald | A. | Miners' Rest, Tambellup | D9M | 1912 |
| MacDonald | A. | Miner's Rest, Tambellup | D9M | 1924 |
| MacDonald | B. M. | Melbourne Location 1099, Ballidu | N2X | 1924 |
| MacDonald | Chas. | Borarie Springs, Peak Hill | 4SS | 1912 |
| MacDonald | D. | Melbourne Loc. 935, Loc. M. 895, Mogumber | CB0 and 47B, 16E | 1962 |
| MacDonald | D. | Farm 1202, Gairdner River | MD1 and 104B, 41A | 1962 |
| MacDonald | D. H. | Balmore Farm, Jindong, via Bussleton | XD2 and 14D, 11E | 1962 |
| MacDonald | D. J. | Wyoming, Koorda | D4M and 40B, 109A | 1962 |
| MacDonald | G. A. & T. M. | Valley Farm, Wundowie | 4MG and 30D, 16E | 1962 |
| MacDonald | H. J. | Roe Loc. 1705, Karlgarin | MU7 | 1962 |
