C
- (Sligo) Clooncunny
- (Roscommon) Cross South
- (Roscommon) Cross North
- (Roscommon) Cartron More
- (Roscommon) Cappagh
- (Roscommon) Creggan
- (Roscommon) Callow
- (Roscommon) Cloonmagunnaun
- (Roscommon) Cartron Beg
- (Roscommon) Carrowgarve
- (Roscommon) Cloonfad
- (Roscommon) Cornamucklach
- (Roscommon) Cloonfinglas
- (Roscommon) Corlis
- (Roscommon) Cloonard
- (Roscommon) Cloonarragh Bridge
- (Roscommon) Cloonarragh
- (Roscommon) Cloonsheever
- (Roscommon) Cloondart
- (Roscommon) Clooncrim
- (Roscommon) Cloontarsna
- (Roscommon) Cloonconra
- (Roscommon) Cloonsuck
- (Roscommon) Cloonelt
- (Roscommon) Cloonbonniff
- (Roscommon) Carrowbehy
- (Roscommon) Caher
- (Roscommon) Cloonagh
- (Roscommon) Corracommeen
- (Roscommon) Cloonacolly