| Name | Sex | Colour | Registration | Foaling Date | Reg Status | Competition Status |
|---|---|---|---|---|---|---|
| CLOYNE SPIKE | Gelding | BAY | 23803 | Stud Book | Deceased | |
| CLOYNE TARA - HSH | Mare | BROWN | C2-197792 | 27/11/2005 | Second Cross | Eligible |
| CLOYNE WILL BE | Mare | BROWN | 6628 | Stud Book | Deceased | |
| CLUARAN JACK SPARROW | Gelding | CHESTNUT | 173565 | 10/09/2003 | Stud Book | Not Eligible |
| CLUARAN SHREK | Gelding | BAY | 157128 | 10/09/2002 | Stud Book | Not Eligible |
| CLUB | Gelding | CHESTNUT | 171888 | 23/03/2006 | Stud Book | Not Eligible |
| CLUB FOOT | Mare | BAY | 13958 | 27/01/1971 | Stud Book | Deceased |
| CLUDEN NEWRY MINDAH | Mare | BAY | 47223 | 10/12/1974 | Stud Book | Not Eligible |
| CLUFFY | Gelding | BROWN | 45964 | 09/10/1976 | Stud Book | Not Eligible |
| CLUMP CHIP - HSH | Mare | BLACK | 178452 | 30/11/2004 | Stud Book | Not Eligible |
| CLUMP JESS | Mare | CHESTNUT | 141540 | 29/10/1999 | Stud Book | Not Eligible |
| CLUMP JEWEL | Mare | CHESTNUT | 141546 | 31/08/2003 | Stud Book | Deceased |
| CLUNIE VALE JOSEPHINE | Mare | GREY | 23823 | Stud Book | Not Eligible | |
| CLUNY ANNABEL | Mare | GREY | 41952 | 09/11/1973 | Stud Book | Not Eligible |
| CLUNY BRITTA | Mare | GREY | 66683 | 06/11/1979 | Stud Book | Deceased |
| CLUNY RIVOLI REBEL | Mare | BLACK | F9419 | 07/10/1977 | Foal Recorded | Not Eligible |
| CLUNY SASCHA | Stallion | CHESTNUT | F14799 | 21/10/1978 | Foal Recorded | Not Eligible |
| CLUNY SHANNON | Mare | BROWN | F25740 | 01/11/1980 | Foal Recorded | Not Eligible |
| CLUNY TIKI | Mare | CHESTNUT | 4001 | 01/08/1968 | Stud Book | Deceased |
| CLUNYPONDS ELLE | Mare | CHESTNUT | 143771 | 31/01/1992 | Stud Book | Not Eligible |
| CLUNYPONDS SIRAYA | Mare | BLACK | 143772 | 14/03/1989 | Stud Book | Deceased |
| CLUSTER PLUCK | Mare | BAY | C1-242838 | 03/01/2008 | First Cross | Eligible |
| CLWYD NARELLAN | Mare | DUN | 42025 | Stud Book | Not Eligible | |
| CLWYD PEBBLES | Mare | BROWN | F37871 | 24/09/1983 | Foal Recorded | Not Eligible |
| CLWYD PENFRIEND | Stallion | BAY | F20362 | 26/09/1979 | Foal Recorded | Not Eligible |
| CLWYD REGAL VICTORY | Gelding | BAY | 71247 | 24/09/1982 | Stud Book | Deceased |
| CLWYD SCRUMPEN | Stallion | BAY | F27063 | 03/01/1981 | Foal Recorded | Not Eligible |
| CLYBUCCA DAME | Mare | CHESTNUT | 9512 | Stud Book | Deceased | |
| CLYBUCCA PENNY | Mare | BLACK | 9511 | Stud Book | Deceased | |
| CLYDE | Gelding | GREY | 26611 | Stud Book | Not Eligible | |
| CLYDE BEN | Gelding | CHESTNUT | 46783 | 01/01/1970 | Stud Book | Deceased |
| CLYDE BRUCE | Gelding | BAY | 64300 | 01/08/1974 | Stud Book | Not Eligible |
| CLYDE SON OF A GUN | Stallion | BAY | 46782 | 01/01/1972 | Stud Book | Deceased |
| CLYDE VALE CAPRI | Mare | CHESTNUT | 61524 | 30/09/1977 | Stud Book | Not Eligible |
| CLYDESDALE BOOMER | Gelding | CHESTNUT | 35727 | 26/08/1974 | Stud Book | Not Eligible |
| CLYNESMITH BELLE - HSH | Mare | GREY | 22349 | Stud Book | Deceased | |
| CLYPSO RAY DEE - HSH | Gelding | BAY | 64404 | 15/02/1979 | Stud Book | Not Eligible |
| CLYTIE | Mare | CHESTNUT | 36904 | Stud Book | Not Eligible | |
| CO BAH | Mare | BROWN | 62002 | 01/05/1970 | Stud Book | Deceased |
| CO CO LASS - HSH | Mare | DUN | 194353 | 06/11/2000 | Stud Book | Not Eligible |
| CO STAR | Stallion | CHESTNUT | F10554 | 15/09/1977 | Foal Recorded | Not Eligible |
| COACHMAN - HSH | Gelding | CHESTNUT | 156485 | 07/09/1990 | Stud Book | Not Eligible |
| COACHWOOD | Mare | BROWN | 6989 | Stud Book | Deceased | |
| COACHWOOD SWEET MELODY | Mare | CHESTNUT | 41716 | 01/10/1973 | Stud Book | Not Eligible |
| COACHWOOD SWEET TALKER | Mare | CHESTNUT | F30326 | 11/11/1981 | Foal Recorded | Not Eligible |
| COAL | Mare | BAY | F12422 | 26/11/1977 | Foal Recorded | Not Eligible |
| COAL CREEK CALOOLA | Mare | CHESTNUT | F22280 | 26/09/1979 | Foal Recorded | Not Eligible |
| COAL CREEK CELESTE | Mare | BROWN | F14179 | 09/11/1977 | Foal Recorded | Not Eligible |
| COAL CREEK CFOR | Stallion | BLACK | F28411 | 12/12/1980 | Foal Recorded | Not Eligible |
| COAL CREEK CLODAGH | Mare | BROWN | 31702 | 05/12/1972 | Stud Book | Not Eligible |
| COAL CREEK CONQUEST | Mare | BROWN | 17379 | 07/07/1965 | Stud Book | Deceased |
| COAL CREEK COUNTESS | Mare | BAY | 31703 | 01/01/1971 | Stud Book | Deceased |
| COAL CREEK HURRAH | Mare | CHESTNUT | 17378 | Stud Book | Deceased | |
| COAL CREEK IRIS | Mare | CHESTNUT | 17377 | Stud Book | Deceased | |
| COAL CREEK NANDINA | Mare | CHESTNUT | F14177 | 19/10/1977 | Foal Recorded | Not Eligible |
| COAL CREEK NINA | Mare | BAY | 36204 | 02/10/1972 | Stud Book | Not Eligible |
| COAL CREEK NONSENCE | Mare | CHESTNUT | F23288 | 18/12/1979 | Foal Recorded | Not Eligible |
| COAL CREEK RADAR | Stallion | CHESTNUT | F22279 | 29/09/1979 | Foal Recorded | Not Eligible |
| COAL CREEK ROCKET | Gelding | CHESTNUT | F14176 | 05/10/1977 | Foal Recorded | Not Eligible |
| COAL CREEK ROSETTE | Mare | CHESTNUT | 36205 | 01/01/1972 | Stud Book | Deceased |
| COAL CREEK RUTH | Mare | BROWN | 17380 | 20/07/1968 | Stud Book | Deceased |
| COAL CREEK SAFARI | Stallion | CHESTNUT | F14178 | 01/11/1977 | Foal Recorded | Not Eligible |
| COAL CREEK SHAMROCK | Stallion | CHESTNUT | F23290 | 30/09/1979 | Foal Recorded | Not Eligible |
| COAL CREEK VALETTA | Mare | CHESTNUT | F14181 | 29/12/1977 | Foal Recorded | Not Eligible |
| COAL CREEK VICOUNT | Stallion | CHESTNUT | F23289 | 29/10/1979 | Foal Recorded | Not Eligible |
| COAL CREEK WIGTAN - HSH | Gelding | CHESTNUT | F6535 | 06/01/1977 | Foal Recorded | Not Eligible |
| COAL CREEK WOBBLE - HSH | Mare | CHESTNUT | F14180 | 15/01/1978 | Foal Recorded | Not Eligible |
| COAL MINERS DAUGHTER | Mare | BAY | 80070 | 11/12/1990 | Stud Book | Deceased |
| COAL MINERS ROMANCE | Mare | BLACK | 260611 | 23/09/2010 | Stud Book | Eligible |
| COAL RIVER PRIDE - HSH | Stallion | BAY | 122210 | 25/01/1993 | Stud Book | Not Eligible |
| COAL STREAM - HSH | Mare | BROWN | 73349 | 02/10/1984 | Stud Book | Deceased |
| COAL WAGON | Stallion | BLACK | C1-140010 | 13/09/1993 | First Cross | Not Eligible |
| COALARA - HSH | Stallion | BROWN | F40073 | 30/10/1984 | Foal Recorded | Not Eligible |
| COALDALE CRUZ | Gelding | BAY | C1-229544 | 09/11/2008 | First Cross | Not Eligible |
| COALFIRE HAVA GUESS | Mare | BAY | 171534 | 22/11/1991 | Stud Book | Not Eligible |
| COALIE | Mare | BAY | 27320 | Stud Book | Not Eligible | |
| COALS OF A CONMAN | Mare | CHESTNUT/ROAN | C1-265424 | 18/10/2023 | First Cross | Not Eligible |
| COALS TOP SECRET | Gelding | BLACK | 264316 | 04/09/2022 | Stud Book | Eligible |
| COALVILLE | Mare | CHESTNUT | 9052 | Stud Book | Deceased | |
| COANDA PANDORA | Mare | BROWN | 36517 | 01/11/1967 | Stud Book | Deceased |
| COBALT LAD | Gelding | GREY | 60146 | 26/11/1976 | Stud Book | Not Eligible |
| COBALT MOON | Gelding | GREY | R-255286 | 25/10/2019 | Base Registry | Eligible |
| COBALTS PLEA - HSH | Mare | BROWN | 45695 | 14/10/1974 | Stud Book | Deceased |
| COBAN CARMELITA | Mare | CHESTNUT/PIED | 49570 | Stud Book | Not Eligible | |
| COBANA LASS | Mare | BAY | 7629 | Stud Book | Deceased | |
| COBANGO BLUEGUM | Mare | GREY | 64868 | 12/11/1979 | Stud Book | Not Eligible |
| COBANGO JUST JOLLY | Mare | BAY/BROWN | 64869 | 01/01/1966 | Stud Book | Deceased |
| COBANGO MURTLE | Mare | BROWN | 52326 | Stud Book | Deceased | |
| COBANGO SWAGGIE | Mare | BAY | 69731 | 21/01/1981 | Stud Book | Not Eligible |
| COBAR COPPER BLUE | Mare | GREY | 138081 | 10/10/1996 | Stud Book | Not Eligible |
| COBAR JACK | Gelding | GREY | 60776 | 01/08/1975 | Stud Book | Not Eligible |
| COBAR JAPARA | Gelding | CHESTNUT | 80586 | 26/11/1993 | Stud Book | Eligible |
| COBARGO CLAYMAN | Gelding | CHESTNUT | 61708 | 01/08/1971 | Stud Book | Deceased |
| COBARK BLUE | Mare | GREY | C1-194263 | 18/11/1999 | First Cross | Not Eligible |
| COBARK RIVER COCHISE - HSH | Stallion | CHESTNUT | 141134 | 02/11/1996 | Stud Book | Not Eligible |
| COBARK RIVER FERGIE | Mare | BAY | 103293 | 04/09/1986 | Stud Book | Deceased |
| COBARK RIVER LETS ELOPE - HSH | Mare | CHESTNUT | 134207 | 02/11/1991 | Stud Book | Not Eligible |
| COBARK RIVER MOUSE | Mare | BAY | 71310 | 07/12/1980 | Stud Book | Deceased |
| COBARK RIVER PIXIE - HSH | Mare | BROWN | 112042 | 19/09/1991 | Stud Book | Not Eligible |
| COBARK RIVER RIMFIRE | Stallion | BAY | F23470 | 24/09/1979 | Foal Recorded | Deceased |