- Craughwell
- Craughwell
- Creduff
- Creig an Chéirín
- Croaghnakeela Island
- Crockaunroe
- Croghnut
- Crossconnell
- Crossooha
- Crosswell
- Crow Island
- Cruagh
- Crump Island
- Crumpan
- Crumpaun
- Cuddoo
- Cur
- Curhownagh
- Curragh
- Curragh West
- Currawatia
- Currywongaun
- Caddagh Glebe
- Carrickleitrim
- Carrickmurray
- Carrickoghil
- Carrigallen
- Carrigeen
- Carrigeencor
- Carrowcrin