| School | Address | Town | County | |
|---|---|---|---|---|
| Ysgol Calon y Dderwen | Park Street | Newtown | Select | |
| Ysgol Capel Garmon | Capel Garmon | Conwy | Select | |
| Ysgol Capelulo | Ffordd Treforus | Conwy | Select | |
| Ysgol Carreg Emlyn | Safle Clocaenog | Rhuthun | Denbighshire (Sir Ddinbych) | Select |
| Ysgol Carreg Hir | Old Road | Neath | Select | |
| Ysgol Carreg Hirfaen | Cwmann | Sir Gaerfyrddin | Select | |
| Ysgol Cedewain | Maesyrhandir | Powys | Select | |
| Ysgol Cefn Coch | Penrhyndeudraeth | Gwynedd | Select | |
| Ysgol Cefn Meiriadog | Groesffordd Marli | Denbighshire | Select | |
| Ysgol Cefnllys | Cefnllys Lane | Powys | Select |