C
- (Laois) Clonduff
- (Laois) Clarahill
- (Laois) Castlecutte
- (Uíbh Fhailí) Cappagowlan
- (Uíbh Fhailí) Curragh
- (Uíbh Fhailí) Cappanageeragh
- (Uíbh Fhailí) Cross Keys Cross Roads
- (Uíbh Fhailí) Cappyroe
- (Uíbh Fhailí) Corndarragh
- (Uíbh Fhailí) Capppancur
- (Uíbh Fhailí) Cully
- (Uíbh Fhailí) Castletown
- (Uíbh Fhailí) Creggan
- (Uíbh Fhailí) Cloneen
- (Westmeath) Cappanrush
- (Westmeath) Canal Harbour
- (Westmeath) Cumminstown
- (Westmeath) Coola Bridge
- (Westmeath) Clongowly
- (Westmeath) Clonyhague
- (Uíbh Fhailí) Cloghatanny
- (Laois) Clarbarracum
- (Laois) Cullenagh
- (Kildare) Castleroe Cross Roads
- (Kildare) Carrigeen Cross Roads
- (Wicklow) Clogh
- (Wicklow) Coolinarrig
- (Kildare) Castlereban North
- (Kildare) Churchtown
- (Kildare) Castlemitchell South