| Clamp | M. | Locs. 14017, 14118, Wattoning | MZ0 | 1924 |
| Clamp | Thos. | Wiracubba Farm, Trayning | C3V | 1924 |
| Clancy | A. B. | 160 Beaufort Street, Perth | 3KL | 1924 |
| Clancy | Christopher | Locs. 5633, 5634, 5635, Williams | C9W | 1912 |
| Clancy | Christopher | Locs. 5633, 5634, 5635, Williams | C9W | 1924 |
| Clancy | G. J. | 2248, 6668, 2502, Nanson | 7GC and 55F, 67B | 1962 |
| Clancy | J. | Loc. 667, 668, 669, Boyup Brook | CJ2 and 20C, 80A | 1962 |
| Clancy | J. & F. M. | Marah, Watheroo | JC4 and 22D, 20E | 1962 |
| Clancy | J. F. | Brentwood Park, Miling | C9J and 11C, 104A | 1962 |
| Clancy | J. J. | Clear Valley, Broomehill | J7C | 1912 |
| Clancy | J. J. | Clear Balley, Broomehill | J7C | 1924 |
| Clancy | J. P. | Ingoloona, Bindi Bindi | 0ZC and 84D, 52F | 1962 |
| Clancy | Joseph James | Morrel Vale, Gnowangerup | 6UC | 1924 |
| Clancy | M. P. | Hillview, Moora | VO0 and 116A, 41B | 1962 |
| Clancy | Martin | Canning Brook, Wattle Grove, Queen's Park | MG2 | 1927 |
| Clancy | Peter | Fairview Farm, via Wagin | 5UC | 1924 |
| Clansen | V. B. | Lake View, Moodiarrup | 7VC | 1912 |
| Clansen | V. B. | Lake View, Moodiarrup | 7VC | 1924 |
| Clapin | J. C., F. R. & T. S. | Koj. Loc. 6632, 6634, Cranbrook | B8C and 32B, 26A | 1962 |
| Clapp | E. L. | Canning Loc. 21, Cannington | 8YC | 1962 |
| Clapp | E. L. | Boyanup 88, 89, 90, 91, Elgin | LC9 | 1962 |
| Clapp | R. B. & V. N. | Bermuda farm, Bilbarin | R8C and 48E, 39B | 1962 |
| Clapp | R. E. | Stirling Lot 31, Capel | 9RC and 34B, 106E | 1962 |
| Clapp | W. H. | Clifton Area, Brunswick | C3L | 1912 |
| Clapp | W. H. | Clifton area, Brunswick | C3L | 1924 |
| Clapp | Wm. Jas. | Lots 5 and 6, Clifton Estate, Brunswick | 8YC | 1924 |
| Clapp | Zephaniah P. | Bermuda Farm, Wogerlin | ZC1 | 1924 |
| Clare | J. P. | Purlieu, Gabbin | Q8C and 50A, 6C | 1962 |
| Clare | J. T. & J. W. | Thurlby Estate, Walpole | TE2 | 1962 |
| Clare | P. | Loc. 20274, Gabbin | Q8C | 1924 |
| Clarey | J. K. | Lunnenburg | JK4 | 1912 |
| Clarey | J. K. | Lunnenberg | JK4 | 1924 |
| Clark | A. | Woodhorn Loc. Nos. 1846, 1847, Busselton | YF1 | 1962 |
| Clark | A. B. | Loc. 16205, Bruce Rock | C3Z | 1924 |
| Clark | A. H. | St. Agnes, Kulin | 0CZ | 1924 |
| Clark | A. H. & J. H. | St. Agnes' Estate, Kulin | 0GZ | 1927 |
| Clark | A. J. | Koolkarnin, Wongon Hills | 3CA | 1912 |
| Clark | A. J. | Locs. 14549, 22548, Ardath | 2HA and 5D, 42E | 1962 |
| Clark | A. W. | Stanmore, Dalwallinu | WC9 and 39A, 12C | 1962 |
| Clark | Angus | Coffee Palace, Blackwood | 2AC | 1912 |
| Clark | Angus | Kooyong, Kwollyinn | C6A | 1912 |
| Clark | Angus | Coffee Palace, Blackwood | 2AC | 1924 |
| Clark | Angus | Kooyong, Kwolyin | C6A | 1924 |
| Clark | Arthur E. | Stewart Downs, Nullagine | UT3 | 1912 |
| Clark | Arthur E. | Stewart Downs, Nullagine | UT3 | 1924 |
| Clark | C. | Midland Company's Run, Walebing | CC5 | 1912 |
| Clark | C. | Midland Coy's Run, Walebing | CC5 | 1924 |
| Clark | D. E. & M. B. | Nelson 8944, 226, 8108, 1719, 8109, 3531, Tweed, 3, 907, Boyup Brook | 0DC and 24B, 42A | 1962 |
| Clark | E. | Broadsound Stud, Cannington | C6K and 120A, 71B | 1962 |
| Clark | E. B. J. & F. J. | Loc. No. 1041 Sussex, Wubin | E8C and 33C, 84A | 1962 |
