| Name | Country | 14C dates | |
|---|---|---|---|
|
441-460 / 460 show all | |||
| Århus Amt | Denmark | 2 | Show |
| Argyll and Bute | United Kingdom | 3 | Show |
| Argyll and Bute | United Kingdom | 0 | Show |
| Ardennes | France | 1 | Show |
| Aragón | Spain | 25 | Show |
| Arad | Romania | 0 | Show |
| Apulien | Italy | 46 | Show |
| Appenzell (Ausserrhoden/Innerrhoden | Switzerland | 0 | Show |
| Antrim | Ireland | 1 | Show |
| Ankara | Turkey | 8 | Show |
| Angus | United Kingdom | 0 | Show |
| Andorra | Andorra | 2 | Show |
| Andalucía | Spain | 278 | Show |
| Alpes-de-Haute-Provence | France | 3 | Show |
| Alba | Romania | 0 | Show |
| Aisne | France | 0 | Show |
| Aegean Island | Greece | 15 | Show |
| Aberdeenshire | United Kingdom | 0 | Show |
| Aargau | Switzerland | 6 | Show |
| Aalborg | Denmark | 8 | Show |
