| Attwill | W. | Common, Yalgoo | W6A | 1924 |
| Attwood | C. H. | Well. Loc. 1088, Capel | 5AA | 1962 |
| Attwood | Chas. N. | Attwood's Farm, Bullaring, via Wickepin | 2NA | 1924 |
| Attwood | David | William Loc. 12147, Pingelly | A4Q | 1924 |
| Attwood | F. J. | Melrose, Latham | 1QZ and 5D, 45E | 1962 |
| Attwood | Frederick John | Latham | 1QZ | 1925 |
| Attwood | I. E. | Sunradale, Metricup | 8EA | 1962 |
| Attwood | J. A. | Springvale, Lowden | 6UN and 107D, 50E | 1962 |
| Atwell | Chas. W. | Stockdale, Coogee | A4W | 1912 |
| Atwell | Chas. W. | Stockdale, Coogee | A4W | 1924 |
| Atwell | E. | Atwell's Horse Bazaar, High Street, Fremantle | 1EA | 1924 |
| Atwell | F. & O. | Woodendale, Toodyay | F0A and F0A (cheek) and 37C, 11E | 1962 |
| Atwell | F. P. | Wooden Dale, Toodyay | F0A | 1924 |
| Atwell | W. C. | Edendale, Mundijong | 1SL and 3B, 71A | 1962 |
| Atwell & Son | E. | Atwell's Run, Byford | 1EA and 18B, 5A | 1962 |
| Atwell Bros. | - | Dunmore, Mundijong | A4W and 60F, 20C | 1962 |
| Aubin | Henry J. | Lot 212, Jandakot | LJ5 | 1924 |
| Aubin | Hy. J. | Lot 212, Jandakot | LJ5 | 1912 |
| Aubrey | John P. | Commonage, York | 9PA | 1924 |
| Aughey | J. G. & D. A. | Nelson Loc. 1029, 1243, 1499, 1564 1709, Boyup Brook | J6A and 104B, 112A | 1962 |
| Auld | E. B. & E. C. | 18256, Muntadgin | 8AB and 32D, 17E | 1962 |
| Auld | H. C. | Avon Loc. 19102-3, 18061, 19106, 18264, Muntadgin | 4KZ and 48B, 40A | 1962 |
| Auld | N. & B. A. | Vic. 8737, Coorow | 0NA and 38B, 105A | 1962 |
| Auld | Robert | Esperance Loc. 1276, 37 Mile, Esperance, Norseman Road | 2QY | 1925 |
| Auld | Wm. | Glen Mavis, East Chapman | V7A | 1924 |
| Auld & Sons | A. W. | Junction Farm, E. Chapman | A3A and 7B, 10E | 1962 |
| Auld & Sons | C. | Ewesley, Muntadgin | C3A and 43D, 21E | 1962 |
| Auld Bros. | - | Loc.18053, Merredin | UB3 | 1924 |
| Aunger | C. G. & E. R. | M1613, M1644, Carnamah | A3F and 43C, 37E | 1962 |
| Aurisch | E. F. | Sussex Loc. 2320, Busselton | 8XY and 35D, 10E | 1962 |
| Aurisch | G. H. | Lakeside, Beermullah | GA7 and 41B, 108A | 1962 |
| Aurisch | S. N. | 5539, 5653, Bassendean | SA1 and 34C, 114A | 1962 |
| Ausden | Wm. | Westonia, Bridgetown | V2N | 1924 |
| Austin | C. J. | Coorara, Ashburton | AU1 | 1912 |
| Austin | C. J. | Coorara, Ashburton | AU1 | 1924 |
| Austin | C. T. | Beeda, Beverley | C3A | 1912 |
| Austin | C. T. | Beeda, Beverley | C3A | 1924 |
| Austin | Herbert | Avon Loc. 20297, Gabbin | V9A | 1924 |
| Austin | J | M. 1265, Muchea | A4X | 1924 |
| Austin | Leslie Douglas | Avon Loc. 23126, Burracoppin | 8LQ | 1924 |
| Austin | R. C. | Corbie, Gnowangerup | RA5 and 39D, 116E | 1962 |
| Austin | W. I. | Abba Farm, Ludlow | AC8 and 57F, 4B | 1962 |
| Austin | W. J. | Bayswater | 2WA | 1928 |
| Austin | Wm. | Ferndale, Upper Preston | AC8 | 1924 |
| Austin & Son | - | Kia-Ora, Aldersyde | AU1 and 18B, 42A | 1962 |
| Austin & Son | A. | Tatiara, Frankland | L2Y and 8B, 46E | 1962 |
| Austin Bros. | - | Middlesex Loc. 9351, Pt. 9352, Jardee | EA3 and 29B, 35E | 1962 |
| Australian Aborignes Evangelical Mission | - | Cundalee Mission Station, Cundalee, via Zanthus | 7CM and 9D, 71E | 1962 |
| Avalon Grazing Co. | - | Avalon, Porongorups | 2CV and 45B, 4A | 1962 |
| Avery | A. & H. | Chingford, Pingelly | 0AV and 11C, 84E | 1962 |
