C
- (County Cork) Castlehaven
- (Kerry) Clashmelcon
- (County Cork) Colleras
- (Clare) Caherfenick
- (Clare) Church Island
- (Clare) Crane Island
- (Clare) Cribby Islands
- (Clare) Cloonoolia South
- (Clare) Cloonamirran
- (Clare) Cloonoolia North
- (Clare) Cappantruhaun
- (Clare) Carton
- (County Tipperary) Coole
- (County Tipperary) Cornode
- (Clare) Cloonmohaun
- (County Tipperary) Cooneen
- (County Tipperary) Cloneybrien
- (County Tipperary) Coolbaun
- (County Tipperary) Corbally
- (County Tipperary) Chadrinagh
- (County Tipperary) Cappanakeady
- (County Tipperary) Controversy
- (County Tipperary) Coolross
- (County Tipperary) Coole
- (County Tipperary) Carrowkeale
- (County Tipperary) Cranavaneen
- (County Tipperary) Coolnacalla
- (County Tipperary) Coolboreen
- (County Tipperary) Curraghduff
- (County Tipperary) Clonygaheen