Place
- Caputh, Perthshire1
- Cargill, Perthshire1
- Carmac, Brittany1
- Carnac, Bretagne1
- Carnanmore, Antrim1
- Castlewellan, Down1
- Channel Islands, United Kingdom1
- Christiania, Norway1
- Chysauster, Cornwall1
- Chywoone, Cornwall1
- Châtelandren, France1
- Clickemin, Mainland, Shetland1
- Clontygora, Armagh1
- Clumlie in Dunrossnes, Shetland1
- Clynnog Fawr, Caernarfonshire1
- Cochno, Dumbarton1
- Coldrum, Kent1
- Cong, Galway1
- Congash, Invernesshire1
- Constantinople, Europe/Asia1