- Cabragh
- Cabry
- Caldavnet
- Calf Island
- Calhaine
- Callaghs
- Callan
- Calliagh
- Canningstown
- Cappry
- Cargagh
- Cargagh
- Cargaghlisnanarney
- Cargaghoge
- Carha
- Carn
- Carn Cross Roads
- Carnaghan
- Carndonagh
- Carnmalin
- Carnowen
- Carntullagh
- Carowcanon
- Carraduffy
- Carran
- Carraskea
- Carrick
- Carrick
- Carrick Bridge
- Carrick Lower Bridge