C
- (Wicklow) Carrigmore
- (Wicklow) Coolnakilly
- (Wicklow) Corragh
- (Wicklow) Carriggower
- (Wicklow) Carrigeershinnagh
- (Wicklow) Coonmore
- (Wicklow) Cloghoge
- (Wicklow) Carrigacurra
- (Wicklow) Curtlestown
- (Wicklow) Cloghleagh
- (South Dublin) Cunard
- (Fingal County) Cappoge
- (Wicklow) Carrig
- (Wicklow) Cloon
- (Wicklow) Crone
- (Wicklow) Calary Upper
- (Wicklow) Calary Lower
- (Fingal County) Corballis
- (Fingal County) Coultry
- (Fingal County) Corduff
- (Fingal County) Cross of the Cage
- (Meath) Clonalvy
- (Fingal County) Clonard
- (Meath) Claire Mount
- (Meath) Colp
- (Meath) Caulstown
- (Louth) Canonstown
- (Louth) Cruisetown
- (Louth) Cobbler’s Cross
- (Louth) Coratown Cross