| Caporn | W. H. | 23790, 23535, 25743, Yoting | 7WC and 10D, 102E | 1962 |
| Caporn | W. H. & C. M. | Marydale, Yoting | D8R and 8B, 7E | 1962 |
| Caporn | W. O. | 19826, 21714, 12084, 12083, 12085, Quairading | 2WC and 52F, 110D | 1962 |
| Caporn | Wilfred T. | Avondale Farm, Nokaning | 5CZ | 1924 |
| Caporn Bros. | - | Huntley Park, Collie Road, via Kojonup | 7ZC | 1924 |
| Capp | J. | Avons. Locs. 21551, 26747, 24033, 13798, 13797, Cunderdin | C2W and 43A, 3C | 1962 |
| Capping | H. H. | Fair View, Brookton | QC0 | 1924 |
| Caraher | T. | Fairfield and Loc. 1505, Pinjarra | 4TP and 56F, 103D | 1962 |
| Caralinga Pty. Ltd. | - | Mourcourup, Borden | F1P and 1C, 8E | 1962 |
| Caramia | D. | Plant Loc. 5745, Albany | 6DC and 31A, 71B | 1962 |
| Caramia Bros. | - | Plant Loc. 5754, Upper King, via Albany | 6BC and 55F, 113D | 1962 |
| Caranoo Past. Co. | - | Caranoo, East Pingelly | CP4 and 17B, 3A | 1962 |
| Caratti & Sons | - | Glenoulin, Waroona | TH9 and 80C, 44A | 1962 |
| Carbone | M. | Lot 19, Loc. 1, Brunswick Junction | MC8 and 6D, 18E | 1962 |
| Carboon | John | Crown Lands, Lawlers | JC0 | 1912 |
| Carboon | John | Crown Lands, Lawlers | JC0 | 1924 |
| Cardell | H. I. | Lots 64 and 71, Yandanooka | C8Y | 1924 |
| Carder | Wm. M. | Westlake, Lower Beaufort | 5CW | 1912 |
| Carder | Wm. M. | Westlake, Lower Beaufort | 5CW | 1924 |
| Cardiff Past. Co. | - | 20368, 9894-5-6-7, 15545, 1191, Yorkrakine | U9D and 7B, 56F | 1962 |
| Cardup Estate | - | Cardup, Byford | NB0 and 17D, 11E | 1962 |
| Cardwell | A. G. | Ngn. Pt. 114, Armadale | U6C | 1962 |
| Cardwell | C. H. | Noman's Lake, E. Narrogin | CC7 | 1924 |
| Cardwell | D. C. | Dunara, Sth. Nomans Lake | CC7 and 55F, 17C | 1962 |
| Cardwell | E. T. B. | Coree, Wickepin | 8EC | 1912 |
| Cardwell | E. T. B. | Coree, Wickepin | 8EC | 1924 |
| Cardwell | H. A. | Messines, Nomans Lake | C4X and 113A, 26B | 1962 |
| Cardwell | H. J. | Corumbene, E. Narrogin | Y8C | 1924 |
| Cardwell | R. H. & M. J. | Lot Nos. 29-77, Yandanooka | CZ5 and 44B, 107E | 1962 |
| Cardwell Bros. | - | Corumbene, E. Narrogin | CC7 | 1912 |
| Carew-Hopkins | J. H. & N. V. | Broadview, Bodallin | 3AW and 8D, 104E | 1962 |
| Carey | H. E. | Wattle Brook, Donnybrook | HE0 | 1912 |
| Carey | H. E. | Wattle Brook, Donnybrook | HE0 | 1924 |
| Carey | Hugh | Lochinavar Station, Marble Bar | UO3 | 1924 |
| Carey | Joseph | Wooroloo | 4NC | 1924 |
| Carey | W. J. | Gibb River Station, via Derby | X1Q | 1924 |
| Carey | Wm. John | Barnett River Station, Derby | 5CQ | 1924 |
| Carey Downs Past. Co. | - | Carey Downs Station, Carnarvon | V0Z and 43A, 21B | 1962 |
| Cargeeg | G. | Gimlet Grove, Bencubbin | GC6 and 32B, 48E | 1962 |
| Cargeeg & Sons | - | Parkfield, Bunbury | VC7 | 1924 |
| Cargill | Geo. | Loc. 18920, Korrelocking | 9ND | 1924 |
| Caris | J. D. | Carisbrook, Coolup, via Pinjarra | J4C | 1912 |
| Caris | J. D. | Carisbrook, Coolup | J4C | 1924 |
| Carlan | J. | Mayfields, Pinjarra | 0VC and115B, 53F | 1962 |
| Carlhansen | A. B. | Monte Carlo, Jandakot | VC1 | 1924 |
| Carlhansen | A. B. von | Monte Carlo, Jandakot | VC1 | 1912 |
| Carlin | F. J. & D. F. | 6994, 3816-7, 16166, 24209-10, Bakers Hill | CC4 and 67D, 44E | 1962 |
| Carlisle | A. J. | Lots 28, 29, Mary Street, Nedlands | V5C | 1924 |
| Carlisle | A. S. S. | Ninghan Loc.677, E. Konalling | SAQ | 1924 |
| Carlisle | W. H. C. | Lot 1184, Ewington, Collie | C6X | 1962 |
