C
- (County Leitrim) Conaghil
- (County Leitrim) Cleighran
- (County Leitrim) Carrowcrin
- (County Leitrim) Carrigeen
- (County Leitrim) Corglancey
- (County Leitrim) Culnascagh
- (Sligo) Cartonroe
- (Sligo) Corlisheen
- (Sligo) Carrowreagh
- (Sligo) Cuiltydangan
- (Sligo) Cornamucklagh
- (Sligo) Coollemoneen
- (Sligo) Cartrontonlena
- (Sligo) Carrickglass
- (Sligo) Carrigeenblike
- (Sligo) Cuilnaglerag
- (Sligo) Cloysuckera
- (Sligo) Clooneenhugh
- (Sligo) Cloghmine
- (Sligo) Carrownagilty
- (Sligo) Carrownyclowan
- (Sligo) Carrowmore
- (Sligo) Carrownadargny
- (Sligo) Carrowoashel
- (County Leitrim) Cunnion
- (County Leitrim) Curry
- (County Leitrim) Corratawy
- (County Leitrim) Caddagh Glebe
- (County Leitrim) Cloonbannive
- (County Leitrim) Carrickoghil