- Cornagunleog
- Cornahaw
- Corracleigh
- Corraneary
- Corravilla
- Corraweelis
- Corville
- Croaghan
- Cronery
- Cross Forts
- Cross Keys
- Crossdoney
- Crosserlough
- Crossmakeelan
- Cullentragh
- Culliagh
- Cullies Cross Roads
- Cabry
- Calf Island
- Calhaine
- Callan
- Cappry
- Carha
- Carn
- Carnaghan
- Carndonagh
- Carnmalin
- Carnowen
- Carntullagh
- Carowcanon