| Name | Country | 14C dates | |
|---|---|---|---|
|
121-140 / 735 show all | |||
| Catalonia | Spain | 17 | Show |
| Catalunya | Spain | 326 | Show |
| Cavan | Ireland | 12 | Show |
| Central Bohemian Region | Czech Republic | 11 | Show |
| Central Greece | Greece | 21 | Show |
| Central Jutland | Denmark | 282 | Show |
| Central Macedonia | Greece | 48 | Show |
| Centre | France | 0 | Show |
| Centre-Val de Loire | France | 53 | Show |
| Centro | Portugal | 23 | Show |
| Ceredigion | Wales | 0 | Show |
| Champagne-Ardenne | France | 16 | Show |
| Chernivets'ka | Ukraine | 4 | Show |
| Cheshire | United Kingdom | 0 | Show |
| Clare | Ireland | 56 | Show |
| Coleraine | Northern Ireland | 0 | Show |
| Connacht | Ireland | 0 | Show |
| Constanţa | Romania | 2 | Show |
| Conwy | Wales | 0 | Show |
| Córdoba | Spain | 0 | Show |
