| Collins & Jones | E. P. & G. E. | Royston, E. Dalwallinu | ON9 | 1924 |
| Collins & Sons | - | Sunshine, Wubin | N1Y and 43A, 19B | 1962 |
| Collins & Sons | J. H. | Spearwood Farm, Mingenew | XC7 | 1924 |
| Collins & Sons | N. E. | Glenalwyn, Dinninup | NC1 and 36D, 17E | 1962 |
| Collinson | E. E. | Midway, Kalannie | EC4 and 24A, 28C | 1962 |
| Collinson | J. | Pt. A 40 & B 39, N. Dandalup | R2U and 14D, 117E | 1962 |
| Collinson & Fleay | John & Norris C. V. | Dulcic Domum, Burngup via Lake Grace | GF1 | 1927 |
| Collis | G. P. W. | Nelson Loc. 10223/4, N. Walpole | YE9 and 32D, 48E | 1962 |
| Collis | P. J. J. & D. | 1739 Hay Loc., Hazelvale, via Denmark | YS0 and 36E, 11D | 1962 |
| Colliver | A. G. | Mallala, Tammin | N0C | 1924 |
| Colliver | S. & G. | Yomlin, Doodlakine | AV7 and 57F, 19D | 1962 |
| Colliver | S. G. | Avon Vale, Doodlakine | AV7 | 1927 |
| Collyn Bros. | - | Bona Joscelin via York | C8B | 1912 |
| Collyn Bros. | - | Bona Joscelin, via York | C8B | 1924 |
| Colmer | C. K. | Plantg. 1943, 945, Marbellup, via Albany | C6C and 37E, 6C | 1962 |
| Colmer | Richard J. | Lake Mahlda, Tenterden East | 9RZ | 1924 |
| Colombera | L. | 2503, 2505, Busselton | YG8 and 67A, 25B | 1962 |
| Colpitts | J. W. | Hippleholme, Winchester | X9C | 1924 |
| Colquhoun | Robt. | Swan Loc. 2030, Sawyers' Valley | 4RQ | 1924 |
| Colreavy | Peter Jos. | Morgans | Q4Y | 1924 |
| Colson | Edmund A. | Nelson Loc. 4030, Darradup | 7XC | 1924 |
| Colt & Fraser | - | Marraloona, La Grange Bay | CF8 | 1924 |
| Coltart | J. H. | Brer Park, Darkan | 6IJ and 13C, 118E | 1962 |
| Colton | Annie | Sandringham Farm, Armadale | 2XE | 1924 |
| Colton | George | Glen Valley, Roelands | Q6C | 1924 |
| Colton | J. | Lond Swamp, Bunbury Coast Road | CN3 | 1912 |
| Colton | W. K. | Glen Valley, Roelands | Q6C and 108D, 43E | 1962 |
| Colum | P. | H.A.A. 68, Waroona | 8PC and 16E, 105B | 1962 |
| Columbus | P. | Great Boulder, Cunderdin | PC7 | 1962 |
| Colvin | Jas. | Gum View Farm, Yuba, via Northampton | CO5 | 1924 |
| Colyer | A. L. | Wedgewood, Karridale | Y5P | 1962 |
| Combe | H. T. | Sussex 1880 Ptn. 1876, 1878, 1879, Busselton | TY2 and 33C, 4E | 1962 |
| Combellack | Samuel | The Ranche, Maida Vale | SG4 | 1928 |
| Combes | D. | Bellhelen, Harvey | CO8 and 71D, 9E | 1962 |
| Combes | L. M. (Mrs) | Winkle Farm, Moojebing | W8N and 41B, 47E | 1962 |
| Combes | T. A. | Hillside, Upper Capel | X8O | 1924 |
| Combley | B. J. | Combley's Farm, Meckering | C7Y and 27B, 28E | 1962 |
| Combs | G. M. | 23 Wilberforce St., Mt. Hawthorn | GC3 | 1962 |
| Combs | Geo. Fdk. Sutton | Jarnadup | GC3 | 1924 |
| Combs | George H. | Waterloo, Picton Junction | GC3 | 1912 |
| Combs | George H. | Waterloo, Picton Junction | GC3 | 1924 |
| Comerford | G. D. | Ningham 3164, 3159, 3170, Mukinbudin | 4GT and 21B, 39E | 1962 |
| Comerford | H. B. | Cunderdin | CQ8 | 1924 |
| Comerford | J. & M. A. | Auchindail, Mukinbudin | C0Z and 50C, 17A | 1962 |
| Comini | C. J. | Windy Ridge, Narrogin | R9C and 13C, 26E | 1962 |
| Comiskey | Henry | Osborne Park | HG0 | 1928 |
| Comley | W. H. | Avon Loc. 17302 & Kwolyin AA 114, Pantapin | 1WC and 30D, 13E | 1962 |
| Comley & Co. | H. S. | Kwolyin A.A. Lots 137-8, Pantapin | CC1 and 48B, 50A | 1962 |
| Commilleri | T. W. P. | Granite Hill Farm, Busselton | 8CF | 1912 |
| Commissioner of Police | Police Horses in State of W.A. | Perth | P/|\F | 1962 |
