- Coopers
- Corntown
- Coytrahên
- Crabtree Green
- Cradoc
- Craig-cefn-parc
- Creigiau
- Crewgreen
- Croes-lan
- Cross Inn
- Cross Inn
- Cross Lanes
- Crossgates
- Crossway
- Cwm-Llinau
- Cwm-nant-gwynt
- Cwm Penmachno
- Cwm-twrch Uchaf
- Cwm-y-glo
- Cwmbach
- Cwmdwyfran
- Cwmfelin
- Cwmfelinfach
- Cwmgors
- Cwmgwili
- Cwmgwrach
- Cwmifor
- Cwmllynfell
- Cwmpenanner
- Cwmsyfiog