| Cluning | L. G. & D. H. | Cockburn Sound 613-375, 341-875, Bentley | V7T and 113B, 32A | 1962 |
| Clutterbuck | C. A. H. | Loc. 3632, 3787, 1457, Narrikup | C5C and 58F, 109D | 1962 |
| Clyne | M. C. | Carnada, Kalgulldening, via Wongan Hills | M9C | 1962 |
| Coad | C. J. & M. R. | Devon Downs, Mt. Barker | CC2 and 52F, 112D | 1962 |
| Coad | E. & I. | Moulyvale, Moulyinning | 0CS and 41B, 39A | 1962 |
| Coad | E. A. | Glenroy, East Brookton | E0Y | 1924 |
| Coad | H. H. & I. M. | Rockdale, Kulin | 2GA and 24B, 40A | 1962 |
| Coad | H. J. | Kentucky Farm, Lake Grace | XL8 | 1924 |
| Coad | J. R. | Camballup, Mt. Barker | YD3 and 20E, 18D | 1962 |
| Coad | S. | Lake View Farm, Nippering East Wagin | 7CN | 1912 |
| Coad | S. | Lake View Farm | 7CN | 1924 |
| Coad | W. G. | Coad's Farm, E. Narrogin | W5C | 1912 |
| Coad | W. J. | Coade's Farm, East Narrogin | W5C | 1924 |
| Coad & Son | E. G. | Killarney, 6782, 6102, 6412, 8312, 8313, Dumbleyung | 7CN and 22B, 53F | 1962 |
| Coad & Son | H. J. | Wolseley, Lake Grace | XL8 and 22D, 58F | 1962 |
| Coady | Wm. | Commonage, Hope Valley, Rockingham | V2Y | 1924 |
| Coaker | H. G. | Leigh Grance, Morawa | 5CV and 12B, 34E | 1962 |
| Coaker | W. H. | Merkanooka | 5CV | 1924 |
| Coakley | D. J. & M. H. | Burlington, Namban | D0C and 14B, 16E | 1962 |
| Coakley | J. G. | Edavale, Shackleton | C2J and 20B, 21A | 1962 |
| Coakley & Co. | - | Boolerappin, Lissadel, Coarinvale & Kokerbin, Kwolyin | CC3 and 10C, 49E | 1962 |
| Coakley Pastoral Co. | - | Cantabilling Station, Jurien Bay | S0L and 13D, 44E | 1962 |
| Coates | A. H. | Killarney, Rocky Gully, via Mt. Barker | A1C and 17C, 13E | 1962 |
| Coates | E. A. | Caringa, Coate's Siding | G6C and 39D, 37E | 1962 |
| Coates | Geo. | Serub Hill, Katanning | 0CA | 1912 |
| Coates | Geo. | Scrub Hill, Katanning | 0CA | 1924 |
| Coates | George F. | Carranger, Coates Siding via Baker's Hill | G6G | 1927 |
| Coates | W. | Rocky Ridge, Busselton | W8X | 1962 |
| Coates | Wm. | Avon Loc. 4184, Clackline | 7VN | 1912 |
| Coates | Wm. | Avon Loc. 4184, Clackline | 7VN | 1924 |
| Coates & Son | J. C. | 111-Mile R. P. F. Spring Hurst Mail, East Wagin | C5O | 1924 |
| Coates Bros. | (L. & C.) | Marton Farm, Trayning | CT2 and 52F, 116D | 1962 |
| Cobb & Co. Ltd. | - | Poison Creek, Lawlers | C0B | 1912 |
| Cobb & Co. Ltd. | - | Poison Creek, Lawlers | C0B | 1924 |
| Cobbe | Thomas | Blocks 10660, 15624, Nangeenan | 6CN | 1924 |
| Cobbin | Violet | Jolimont, 260 Barker Road, Subiaco | VC8 | 1924 |
| Cobby | E. | Bondo, Thomson's Brook | E9C | 1912 |
| Cobby | E. P. | Kaloorup, via Busselton | C4Y | 1962 |
| Cobby | W. R. | Loc. 317 W. Rockingham | O7E | 1962 |
| Cobby | Wm. Richard | Dandaloo, Thomson's Brook | O7E | 1924 |
| Cobham Pastoral Co. | - | Cobham, Hammersley Siding | L2L and 17C, 46A | 1962 |
| Cobley | R. N. | Doogalook, Walkaway, via Geraldton | P4X and 54F, 11C | 1962 |
| Cobra Pastoral Co. | - | Cobra Station, Carnarvon | CO7 and 22C, 7E | 1962 |
| Coburn Pastoral Co. | - | Past. Leases 394/506, 1067, 1310, 1311, Hamelin Pool, via Carnarvon | 7OJ and 5B, 37E | 1962 |
| Cochran | E. | Spring Hill, Kelmscott | 2DC | 1912 |
| Cochrane | E. | Springhill, Kelmscott | 2DC | 1924 |
| Cochrane | J. | Springdale, Duranillin | V4K and 7B, 6E | 1962 |
| Cochrane | L. J. | Stony Ridge, Duranillin | CB6 and 24B, 107E | 1962 |
| Cochrane | L. P. & F. L. | Loc. 3515, 3963, Duranillin | 1CP and 31D, 120E | 1962 |
| Cochrane | N. G. | Yaramano Part of Well Loc. 4752, Duranillin | N6C and 45B, 108E | 1962 |
