C
- (Kilkenny) Castletown
- (Kilkenny) Coolnacrutta
- (Laois) Cannonswood Cross Roads
- (Laois) Coneyburrow Bridge
- (Laois) Coolkerry
- (Laois) Coolfin Cross Roads
- (Laois) Coolbally
- (Laois) Clogh
- (Kilkenny) Castlemarket Bridge
- (Louth) Cloughmore
- (Louth) Currathir Bridge
- (Louth) Cornamucklagh
- (Louth) Chanonrock
- (Louth) Carnbeg
- (Uíbh Fhailí) Curralanty Cross Roads
- (Uíbh Fhailí) Corolanty
- (Uíbh Fhailí) Coolaghansglaster
- (Uíbh Fhailí) Cogran
- (Uíbh Fhailí) Carrick
- (Uíbh Fhailí) Cranereagh Bridge
- (Uíbh Fhailí) Clondelara
- (Uíbh Fhailí) Cloghal
- (Uíbh Fhailí) Clortrane
- (Uíbh Fhailí) Clonaderg
- (Uíbh Fhailí) Clonmacnoise
- (Westmeath) Creggan
- (Laois) Clonagooden
- (Laois) Carrowreagh
- (Laois) Corraun
- (Laois) Cuddagh