| Registered Name | Owner / Club | Status |
|---|---|---|
| Cinn Oir | Sharon Murphy Donegal Gaeltacht | Approved |
| Cinnabar | Ruth Hurley Burren | Approved |
| Cinnamon Spice | Sara Wood Cill Dara | Approved |
| Circadian Rhythm | Keith Jamieson Hollybrook | Approved |
| Circle T Buster | Ken Woods Slane and Balrath | Approved |
| Circus | Rebecca Mahony Foxborough | Approved |
| Ciris Van De Nachtegaele | Patrick Mahon Warrington | Approved |
| Ciska II | Ceara Banner Abbeylands | Approved |
| City Star | Emer McNamee Headfort | Approved |
| CJ | FRASER O' REILLY Ballinasloe | Approved |
| CJ Summersky | Fidelma Clare Carne | Approved |
| CJS Powerpoint | Sheena Klingen Copperfield | Approved |
| CJs Quest | Catherine Killeen Warrington | Approved |
| Clabbystown Blue Cloud | Sophie Meehan Benbulben | Approved |
| Clabbystown Jupiter | Emma Murtagh Ross House | Approved |