| Adamson & Allan | - | Landerdale, Collie | A6J | 1912 |
| Adamson & Allan | - | Lauderdale, Collie | A6J | 1924 |
| Adamson & Co. | R. H. | Yakabindie Station, Leonora | 2AT and 13D, 11E | 1962 |
| Adamson Co. | R. H. | Pascoe, Kathleen Valley | 2AT | 1924 |
| Adaway | P. | Brooklyn, Wagerup | MQ6 and 58F, 39B | 1962 |
| Adcock | A. E. (Trustee for A. R. W. Thomson J. B. Thomson Thelma E. Adcock) | Blocks 1412/56 and 4552/74, Williams | AA4 | 1924 |
| Adcock | A. E. (Trustee for A. R. W. Thomson, J. B. Thomson, Thelma E. Adcock) | Block 1412/56 and 4552/74, Williams | AA4 | 1912 |
| Adcock | C. J. (Trustee for A. R. W. Thomson, J. B. Thomson, Thelma E. Adcock) | Brooking Creek, Horsehoe Bend Stations., West Kimberley | 4AT | 1912 |
| Adcock | H. I. N. | Kojonup Loc. No. 8902, Arthur River | H1A and 33C, 29E | 1962 |
| Addis | A. J. J. | Glendaragh, Nyabing | VA7 and 50D, 67E | 1962 |
| Addis | Arthur | Avon Loc 12438, Booralaming | X8A | 1924 |
| Addis | R. J. | Gordon River Est. Cranbrook | GR8 and 28B, 38A | 1962 |
| Addison | G. J. & R. | Salmon Gun, Esperance | 4QA | 1924 |
| Addison | Gordon John | Fitzgerald, Loc. 356, Salmon Gums | GA8 | 1926 |
| Addison | Robert T. | Fitzgerald Locs. 252 and 802, Salmon Gums | 5FQ | 1925 |
| Addison & Son | - | Rocky View, Bruce Rock | LA7 and 7C, 40E | 1962 |
| Aderson | Cyril Victor | Esperance Loc. 864, 928, Scaddan via Norseman | GV7 | 1926 |
| Aderson | Douglas Cran | Thainstone, Circle Valley via Norseman | D3G | 1926 |
| Aderson | George Henry | Llewellyn, Williams Loc, 10099, Kulin | 8GA | 1926 |
| Adkins | J. J. | Glen Ercott, Broomehill | A0W and 52F, 25D | 1962 |
| Adlam | F. E. & G. R. | Avon Loc. 11924, Kodj Kodjin | F0G | 1912 |
| Adlam | F. E. & R. G. | Avon Loc 11924, Kodj Kodjin | F0G | 1924 |
| Adlam | J. R. | Poverty Point, Trayning | 4UA | 1924 |
| Adlam | J. R. | Poverty Point, Trayning | YA9 | 1924 |
| Adler | R. O. & S. J. | Twow View, Napier, via Albany | R9A and 40B, 113E | 1962 |
| Adolf | H. T. | Wyndham | T6T | 1912 |
| Adolf | H. T. | Wyndham | T6T | 1924 |
| Adolphe | W. G. & P. T. | Devon Park Farm, Armadale | 7DP and 29B, 35A | 1962 |
| Affeck | W. | H. F. 1905 Wilga | 0AF | 1924 |
| Affleck | D. G. | Epping, Wilga | 0AF and 46C, 106E | 1962 |
| Affleck | W. | H. F. 1905, Wilga | 0AF | 1912 |
| Agapoff | S. | Donbrava, Hyden | SA2 and 18B, 117E | 1962 |
| Agar | F. H., G. H., F. S. | Merkanooka, Central Morawa | 0GA | 1912 |
| Agar | F. H., G. H., F. S. | Merkanooka, Central Morawa | 0GA | 1924 |
| Agar | G. H. | Macclesfield, Morawa | 0GA and 28C, 119E | 1962 |
| Agars & Co. | B. M. | Pinjin Station, via KalgoorlIe | DU1 and 22B, 32A | 1962 |
| Ager | William | Mayndale, Upper Blackwood | 4AE | 1924 |
| Ager | Wm. | Mayndale, Upper Blackwood | 4AE | 1912 |
| Agg | C. S. M. | Boonie Doon, Nannup | X2A | 1962 |
| Aggiss | D. M. | Roe Loc. 1713, Karlgarin | MA7 and 41D, 114E | 1962 |
| Aggiss | F. A. | Glen Valley, Karlgarin | AF9 and 35B, 104A | 1962 |
| Aggiss | J. W. C. | Hadleigh Farm, Karlgarin | 9WA and 42C, 9E | 1962 |
| Agnello | G. | N. Wanneroo | A2U | 1962 |
| Agricultural Deparment | - | W. A. | W1A | 1924 |
| Agricultural Department | - | W.A | W1A | 1912 |
| Aguilar | Jas. John | Latham's Rock, Coorow | 5AV | 1912 |
| Aguilar | Jas. John | Mayndale, Upper Blackwood | 5AV | 1924 |
| Ah | Chong | Commouage, Mingenew | W9Z | 1924 |
| Ah | Ying | Mack Lagoon, Wyndham | 2YW | 1924 |
| Ah Chong | - | Commonage, Mingenew | W9Z | 1912 |
