| Cockram | G. W. | Homestead, Mardella | 0J K | 1912 |
| Cockram | G. W. | Homestead, Mardella | 0JK | 1924 |
| Cockram | H. A. J. | Sandhill, Yorkrakine | 7IC and 18A, 47B | 1962 |
| Cockram | H. J. & W. E. | Greenfield farm, Cannington | H6C | 1912 |
| Cockram | H. J. & W. E. | Greenfield Farm, Cannington | H6C | 1924 |
| Cockram | R. E. | Cannington | E0U | 1924 |
| Cockram | V. | Stock Bazaar, Pier Street, Perth | VC9 | 1924 |
| Cockram | V. (Mrs) | Feern Park, Gingin | C2E and 50C, 24A | 1962 |
| Cockram | V. D. | Mallee Farm, Avon Loc. 14058, Nukarni | 0JK and 12B, 80E | 1962 |
| Cockram | W. S. & M. | Williams Locs. 9741, 9742, 9347, 13868, Lake Grace | JA5 and 17D, 17E | 1962 |
| Cockram | Wilfred H. | Cockram's Farm, Jarrahdale | JT3 | 1912 |
| Cockram | Wilfred H. | Cockram's Farm, Jarrahdale | JT3 | 1924 |
| Cockram & Neave | - | North Pool, Laverton | C1N | 1912 |
| Cockram & Neave | - | North Pool, Laverton | C1N | 1924 |
| Cockram & Sons | C. E. | Clear Hills, Gnowangerup | C9C and 11B, 115E | 1962 |
| Cockram's Propty. Ltd. | - | Fairfield, Broomhill | 7UP | 1924 |
| Cockrane | I. W. | Hopewell Farm, Moodiarrup, West Wagin | WC1 | 1924 |
| Cockrane | J. S. | Collie Road, Kojonup | V4K | 1924 |
| Cockrane | John Jun. | Moodiarrup | Y6C | 1924 |
| Cocks | Henry | Landsdowne Farm, Nyabing | X0C | 1924 |
| Cockshott & Greatorex | - | Lakeside, Moodiarrup | YX4 | 1924 |
| Codling | T. H. | Harton Fauld, Dudinin | TC0 and 48A, 11B | 1962 |
| Cody | Michael | Northam | MC4 | 1912 |
| Cody | Michael | Northam | MC4 | 1924 |
| Coe | J. D. | 1425, 1566, 1683, 11833, 11126, Nelson Loc., Dinninup | 4CJ and 8D, 34E | 1962 |
| Coe | V. A. | Avon Loc. 4430, 10086, Toodyay | VC4 and 21B, 102E | 1962 |
| Coe | W. J. M. | Crann's Newtown | 7ZE | 1924 |
| Coe & hatton | - | Invermay, Wyalcatchem | C8O | 1912 |
| Coe & Hatton | - | Invermay, Wyalcatchem | C8O | 1924 |
| Coen | J. | Commonage, Bulong | C9H | 1912 |
| Coen | J. | Commonage, Bulong | C9H | 1924 |
| Coen | James | Mt. Ida, Mt. Ida | 3JC | 1912 |
| Coen | James | Mt. Ida, Mt. Ida | 3JC | 1924 |
| Coen & Robertson | - | Yunda, Mt. Ida | RO6 | 1912 |
| Coff | Arthur McL. | Warren Road, East Katanning | U6C | 1924 |
| Coff | Thomas | Balcatherine, 141 Gate, E. Katanning | T6G | 1924 |
| Coffen | Wm. | Roy Hill Station, Nullagine | 1VO | 1924 |
| Coffey | A. J. | Sussex Loc. 2437 & 2438, Karridale | 7TC | 1962 |
| Coffey | B. | Tralee Farm, Serpentine | BC8 | 1962 |
| Coffey | D. J. | Thompson road, North Fremantle | DY5 | 1924 |
| Coffey | Edward | Lawlers | TE2 | 1912 |
| Coffey | Edward | Lawlers | TE2 | 1924 |
| Coffey | J. C. | Brewood Farm, Karridale | KM5 | 1962 |
| Coffey | J. H. & G. E. | Umalga, Maida Vale | UM1 and 113B, 38A | 1962 |
| Coffey | J. M. | 199, Subiaco | M9C and 49C, 11A | 1962 |
| Coffey | J. T. | Block Nos. 139, 402, Serpentine | KC6 | 1962 |
| Coffey | P. | Pipe Clay Well, Meckering | PC8 | 1912 |
| Coffey | P. | Pipe Clay Well, Meckering | PC8 | 1924 |
| Coffey | T. B. | Maryville, Lower Chittering | O1C and 3B, 30E | 1962 |
| Coffey & Son | D. | Killarney, Serpentine | DC6 and 71C, 119E | 1962 |
