| Leach | G. | Swan Loc. 1221, Wanneroo | G9L | 1962 |
| Leach | G. A. | Yilgarn Loc. 302-3 and Miners Homestead Lease 68, Westonia | GL5 and 37E, 42D | 1962 |
| Leach | George | Block 140, Waroona | G9L | 1924 |
| Leach | Herbert | Braeside, Waroona | KX7 | 1924 |
| Leach | J. F. | Lot 8, Wannamal | JL8 and 31D, 12E | 1962 |
| Leach | John Raymond | Koorda | JL2 | 1928 |
| Leach | K. & I. M. | Yilgarn Loc. 148 Moorlands, Westonia | K1L and 16D, 47E | 1962 |
| Leach | M. D. | Loc. 69 and 71, Brookhampton | FL0 and 3B, 115E | 1962 |
| Leach | Robt. Harold | Nos. 425, 1221, 616, Coolup | 8LP | 1924 |
| Leach | V. J. | Preston Lot 68 Capel 125-6, Boyanup | 2VL and 16B, 11A | 1962 |
| Leach & Son | A. | Glenlea, Katanning | LA9 and 5B, 103A | 1962 |
| Leach & Sons | - | 3336-7, Kalannie | A2L and 46D, 20E | 1962 |
| Leadbeater | John R. | Brand Dole Farm, Wubin | UO9 | 1924 |
| Leadbeter & Davis | - | Bloemfontein, Kojonup | D1L | 1912 |
| Leader | A. E. E. | Nelson Location 6662, Jarnadup | UQ2 | 1924 |
| Leah | J. H. | Greenacres, Yarding | L6J | 1924 |
| Leahy | J. | The Hairn, Pithara | X8L | 1924 |
| Leahy | M. H. | Hazeleigh, East Pingelly | M6L and 31D, 117E | 1962 |
| Leahy | Micheal | Bejoording | 8MJ | 1924 |
| Leahy | Thomas | Victoria Plains | TL7 | 1924 |
| Leahy | Tim | Marne Sidiing | U4L | 1924 |
| Leahy | W. J. | Linga Longa, Wubin | JW4 and 117A, 50B | 1962 |
| Leahy & Sons | M. | Henley Farm, Pithara | 8MJ and 24E, 37D | 1962 |
| Leahy & Sons | T. J. & S. | Lurgan, Pithara | 8SL and 21D, 102E | 1962 |
| Leake | Albert | Gascoyne | AL7 | 1924 |
| Leake | Bruce W. | Cardonia, Kellerberrin | BL1 | 1924 |
| Leake | H. W. | Fourwinds, Kununoppin | L1K and 16B, 38E | 1962 |
| Leake | Henry W. | Karinia, Kununoppin | L1K | 1924 |
| Leake | M. H. & F. A. | Nanthana, Pingelly | 0LN and 25B, 16A | 1962 |
| Leake | R. B. & E. A. | Monrambine, Pingelly | J4S and 27B, 26A | 1962 |
| Leake | R. M. | Mooranoppin, Via Kellerberrin | LB8 | 1924 |
| Leake | T. Hubert | Mooranoppin West, Via Kellerberrin | O0K | 1924 |
| Leake & Roskams | - | Utopia, Kellerberrin | 1LR | 1924 |
| Leake & Son | A. G. | Lammea, Popanyinning | X8M and 12B, 115E | 1962 |
| Leake & Sons | B. W. | Cardonia, Kellerberrin | BL1 and 8B, 3E | 1962 |
| Leake & Sons | T. H. | Wilyara, Kellerberrin | O0K and 15B, 11E | 1962 |
| Leake Ryles & Wansbrough | A. & H. & H. | Via Peak Hill | LJ8 | 1924 |
| Leamy | John W. | Location 4108, Morowa | YL3 | 1924 |
| Leaning & Hayes | E. H. & E. | Spencer Road, Cannington | 5KL | 1924 |
| Leanner | F. | Peak Hill | FL6 | 1924 |
| Leapingwell | A. R. | East Lynn, Kulikup | R9L | 1962 |
| Lear | K. R. & N. R. | Loc. 1400, Margaret River | K8R and 109B, 118A | 1962 |
| Leathard | A. & E. R. | Bullock Hills, Dumbleyung | L9X and 19C, 6E | 1962 |
| Leathard | Alfred | Bullock Hills, Via Dumbleyung | L9X | 1924 |
| Leaver | F. L. & A. M. | Talga, Toodyay | 2FL and 17B, 19A | 1962 |
| Leaver | Frank W. | The Homestead, Byford | 2FL | 1927 |
| Leaver | S. A. | Bundarra, Wilsons Patch, via Leonora | MY6 and 7C, 31E | 1962 |
| Leaver & Son | - | Chiltern Farm, Dalwallinu | X9L | 1924 |
| Leavy | Patrick | Spring Vale, Waroona | PL3 | 1924 |
| Leclezio | J. M. | Greenfields, Mandogalup | M8L and 117B, 30A | 1962 |
