C
- (Mayo County) Cloonlavis Lower
- (Mayo County) Cloonlavis Upper
- (Mayo County) Curraghteemore
- (Mayo County) Carrownageeragh
- (Mayo County) Carrowreagh
- (Mayo County) Cuiltybo
- (Mayo County) Coolaght
- (Mayo County) Curneen
- (Mayo County) Cloonmore Upper
- (Mayo County) Churchfield
- (Mayo County) Cloonlee
- (Mayo County) Carrowmore
- (Mayo County) Cloonlyon
- (Mayo County) Carrowreagh
- (Mayo County) Classaghroe
- (Mayo County) Carrowscoltia
- (Mayo County) Cappagh
- (Mayo County) Cloonfeaghra
- (Mayo County) Cloonean
- (Mayo County) Cloonacurry Lough
- (Mayo County) Cloonacurry
- (Mayo County) Clooncah
- (Mayo County) Crossard
- (Mayo County) Cartron North
- (Mayo County) Crossbeg
- (Mayo County) Cloongawnagh
- (Mayo County) Carrowbeg
- (Mayo County) Cloonaweema
- (Mayo County) Cloonalison
- (Mayo County) Cloonfaulus