- Culleen
- Cullenagh
- Clonakilty
- Cobh
- Cackanode
- Caher
- Caher
- Caher
- Caheraphuca
- Caherbarnagh
- Caherdowney
- Caherdrinny
- Cahergal
- Cahergarriff
- Caherkeen
- Caherlag
- Cahermoanteen Bridge
- Cahermore
- Cahermucker
- Cahernaeaha
- Calaiste
- Calf Island East
- Calf Island Middle
- Calf Island West
- Calf Islands
- Callaros Eighter
- Canalough
- Candroma
- Capel Island
- Cappaboy Beg