C
- (Roscommon) Creevy
- (Roscommon) Cloonavullaun
- (Roscommon) Coolaghtane
- (Sligo) Corkagh Beg
- (Sligo) Cartronofarry
- (Sligo) Carryduff
- (Sligo) Carrownacreevy
- (Sligo) Carrownurlar
- (Sligo) Corkagh More
- (Sligo) Carrownamadoo
- (Sligo) Cloondrihara
- (Sligo) Carrownaleck
- (Sligo) Carrowntober
- (Sligo) Carraun
- (Sligo) Castleloye
- (Sligo) Cloonarara
- (Sligo) Cloonbaniff
- (Sligo) Cloonaraher
- (Sligo) Carrowntawn
- (Sligo) Cashel North
- (Sligo) Carrowmurray
- (Sligo) Carrownaskeagh
- (Sligo) Carrownabanny
- (Sligo) Cabragh
- (Sligo) Carroward
- (Sligo) Carrowbleagh
- (Sligo) Carrownaknockan
- (Sligo) Carrownree
- (Sligo) Carrowdurneen
- (Sligo) Carrowmorris