| Aitken | A. R. | Red Hill, Mt. Kokeby | 6AR and 117B, 29A | 1962 |
| Aitken | Alex | Avon Location 5140, West Pingelly | 6AA | 1912 |
| Aitken | Alex | Wagerup, Wagerup | A6A | 1912 |
| Aitken | Alex | Avon Location 5140, West Pingelly | 6AA | 1924 |
| Aitken | Alex | Wagerup | A6A | 1924 |
| Aitken | E. I. | Koonkoobing, Welbungin | 0EA and 109D, 24E | 1962 |
| Aitken | Isaac | Karriburn, Manjmup | 1QA | 1924 |
| Aitken | James R. | Wagerup | JA1 | 1924 |
| Aitken | Jas. R. | Wagerup | JA1 | 1912 |
| Aitken | R. A. & R. M. | Touarae, Bencubbin | A2R and 29B, 118E | 1962 |
| Aitkenhead & Son | G. | Spruceville, Tammin | H7D and 25D, 20E | 1962 |
| Akehurst | A. | 9979, Northcliffe | 8YX | 1962 |
| Akesson | B. T. | Rosedale, Bilbarrin | QA6 | 1924 |
| Akesson | D. O. | Stockholm Valley, Metricup, via Busselton | D0A and 37B, 46A | 1962 |
| Akesson | R. C. | Glenveil, Wubin | 7AX and 39B, 103A | 1962 |
| Akhar | J. | Wiluna, Leonora | AQ9 | 1924 |
| Akhust | Frederick | The Pines, 4758, Perenjori | F8A | 1924 |
| Aladad | - | Coolgardie | AD4 | 1924 |
| Albrey | A. H. | Buffalo, Yelverton | AY0 | 1962 |
| Albyn-Vale Pastoral Co. | - | Swan Loc. 13 & 14, Midland Junction | AV1 and 3B. 111E | 1962 |
| Albyn-Vale Pastoral Co. | - | 236 253, Coolup | AV2 and 4B, 113E | 1962 |
| Alcester | - | Avon Loc. 27356, Kellerberrin | BC6 and 39C, 71A | 1962 |
| Alcock | G. F. | Ducken Warren via Dowerin | F7A | 1912 |
| Alcock | G. F. | Duckenwarren, via Dowerin | F7A | 1924 |
| Alcock | H. W. | Maddington, Maddington | W5F | 1912 |
| Alcock | Joseph | Culland, York | 2JA | 1924 |
| Alcock | M. C. | Bald Rock, Yornaning | M9A and 42B, 20A | 1962 |
| Alcorn | Chas. A. | Mingenew Townsite, care of Elder Smith & Co., Perth | 4AO | 1924 |
| Alcorne | Chas. A. | Rockview, Mummballun | O5A | 1924 |
| Alden | H. P. | Haldene, Kulin | WH2 and 13D, 30E | 1962 |
| Alderson | W. | Deerness, Armadale | W1O | 1962 |
| Aldred | Reginald John | Antequera, Booralaming, via Dowerin | 1UA | 1924 |
| Aldridge & Symers | - | Glenview, Lower Kalgan-Albany | AS2 | 1927 |
| Aldum | E. W. | Oakridge Farm, Tarwoonga Road, Williams | 9AV | 1924 |
| Aldus | Quintin | Youanmi | OA3 | 1924 |
| Alexander | Ernest H. B. | Hamel | VA9 | 1924 |
| Alexander | J. D. | Murray 342-3, Hamel | 8JA and 9D, 44E | 1962 |
| Alexander | J. D. | Whip-Ma-Whop-Ma, Chidlow | 9JD and 113B, 29E | 1962 |
| Alexander | J. M. | Golden Grove, Mt. Kokeby | CG2 | 1912 |
| Alexander | J. W. | Armadale, Armadale | 5WX | 1962 |
| Alexander | John | Commonage, Collie | DO5 | 1924 |
| Alexander | Robert | Blocks 7331/55, 5937/55, The Upper Blackwood Peninsular, Bridgetown | RA8 | 1924 |
| Alexander | Robt. | Blocks 7331/55, 5937/55, the Upper Blackwood Peninsula, Bridgetown | RA8 | 1912 |
| Alexander | S & I. | Cloverdale, Hamel | VA9 and 12C, 11A | 1962 |
| Alexander | T. G. | 5207, 8297, 9798, 8972, Nannup | T1A and 84D, 7E | 1962 |
| Alexander | V. M. | Plenabar, N. Dandalup | 5WP and 13B, 29A | 1962 |
| Alexander | W. | Sheriden, Miling | DO5 and 4D, 43E | 1962 |
| Alexander | William | Bunbury and Nannup, South Bunbury | Z3A | 1924 |
| Alexander | Wm. John | Townsite, Armadale | 5WX | 1924 |
| Alfieri | W. | Maydale, Latham | W0A and 51F, 104B | 1962 |
