| Carlon | Ida | Commanage, Wyndham | 2UX | 1924 |
| Carlourie Estate | - | Carlourie, Narrogin | 5RF and 42E, 117D | 1962 |
| Carlshausen | E. G. | Namron Downs, Wubin | ND1 and 35B, 111E | 1962 |
| Carlshausen & Co. | W. N. | Pinewood, Wubin | Z6H and 25B, 19A | 1962 |
| Carlson | Alfred | Riverdale, Popanying | AC0 | 1912 |
| Carlson | Alfred | Riverdale, Popanyinning | AC0 | 1924 |
| Carlson | Gustav | Calcatup, Katanning | G2C | 1912 |
| Carlson | Gustav | Calcatup, Katanning | G2C | 1924 |
| Carlson | Henry | Rosalie, Balingup | HC6 | 1912 |
| Carlson | Henry | Rosalie, Balingup | HC6 | 1924 |
| Carlsson | J. A. F. | Lot 7, Clifton Area, Brunswick Junction | C7O | 1962 |
| Carlsson | R. | Murray 417-43-44-802, Coolup A 66, Waroona | RC4 and 27D, 8E | 1962 |
| Carlsson | S. E. G. | Glenview, Brunswick Junction | ZK5 | 1924 |
| Carlsson | S. E. G. | Lot 9, Clifton Ave., Bruswick Junction | ZK5 | 1962 |
| Carlton | E. G. | Ninhan Locs. 2753, 3011, Wialki | 4GC and 41D, 71E | 1962 |
| Carlyon | Flora H. S. | Kally, Yalgoo | J6H | 1912 |
| Carlyon | Flora H. S. | Kally, Yalgoo | J6H | 1924 |
| Carlyon | H. & R. J. | Arcadia, Yalgoo | P9O | 1924 |
| Carman | F. W. | 142 Anzac Tce., Bassendean | F0C | 1962 |
| Carman | R. J. | Treatment Works, 60 Trfalgar Road, East Perth | 7KR | 1924 |
| Carman & Ruhen | - | Block 384, Denmark | C4R | 1912 |
| Carman & Ruhen | - | Block 384, Denmark | C4R | 1924 |
| Carmichael | Thomas | Kulinbah, Maya | 8ZO | 1925 |
| Carmichael | Wm. | Blocks 1447, 1451, Upper Preston | 8CZ | 1924 |
| Carmichael Bros. | - | Jandakot, South Jandakot | C2L | 1912 |
| Carmichael Bros. | - | South Jandakot | C2L | 1924 |
| Carmichael-Smith | H. | Bundaleer, Arthur River | HS3 and 42C, 120E | 1962 |
| Carmody | A. G. | Mittakeri, Kulin | AC1 and 51F, 45C | 1962 |
| Carmody | E. J. | College Farm, Trayning | UF4 | 1924 |
| Carmody | J. G. | Springhaven, Cunderdin | KR3 | 1924 |
| Carmody | L. B. & V. M. | Maryland, Wagin | LC8 and 56F, 3C | 1962 |
| Carmody | L. V. & S. J. | Hillcrest, E. Highbury | 1LC and 31A, 9B | 1962 |
| Carmody | R. & F. | Grassmere, E. Narrogin | TC0 and 40A, 33C | 1962 |
| Carmody & Co. | J. H. | Locksley, Irwin | LX1 and 40B, 4E | 1962 |
| Carmody & Sons | A. P. | Killarney, Kuliu | AC6 and 55F, 21C | 1962 |
| Carmody Bros. | - | Grassmere, East Narrogin | TC0 | 1912 |
| Carmody Bros. | - | Grassmere, East Narrogin | TC0 | 1924 |
| Carn | J. G. | Avon Valley, Cuballing | 8KJ | 1924 |
| Carnarvon Municipal Council | - | Commonage, Carnarvon | P9C | 1912 |
| Carnarvon Municipal Council | - | Commonage, Carnarvon | P9C | 1924 |
| Carne | Herbert V. | Quaindering, Williams | VC0 | 1924 |
| Carne | W. C. | Collindale, Williams | VC0 and 34B, 25E | 1962 |
| Carne | W. V. | Sub. 10, 11, 12, 13-51, 52, 53, 54, 9588, Part 22, 23, 28, 29, Williams | 4WC and 3B, 34E | 1962 |
| Carney | Albert | Peak Hill | 6QC | 1924 |
| Carney | Austin | Needilup | 4QL | 1924 |
| Carney | F. | Chesters Crossing, Kent 829, 855, Needilup, via Ongerup | 4WA and 14C, 18E | 1962 |
| Carney, Morris | A. E. & E. M. | 1745 & 2005, Chidlows | W8C and 116B, 44A | 1962 |
| Carnicelli | P. P. | 412, Marvel Lock | 1PC and 6D, 43E | 1962 |
| Carpenter | A, C. & E. H. | 373, 583, 375, 615-6-7, Ongerup | A7C and 16A, 6B | 1962 |
| Carpenter | Albert V. | Kent Location 355, Ongerup | V8C | 1924 |
