- Clogheen
- Clogheen
- Clonagh
- Cloncumber
- Cloncurry
- Cloncurry
- Clondoolusk
- Clonegath Cross Roads
- Cloney
- Cloneybeg
- Clongorey
- Clonkeen
- Clonkeen Cross Roads
- Clonsast
- Clownings
- Colbinstown
- Confey
- Connaught Bridge
- Connellmore
- Conroy’s Cross Roads
- Coolaght
- Coolayna Haggard
- Coolearagh
- Cooleland Cross Roads
- Corbally Cross Roads
- Courtown Bridge
- Crinstown Cross Roads
- Crockaun
- Crookstown
- Crosskeys