Caio
| |
|---|---|
| Village | |
 | |
  Caio Location within Carmarthenshire | |
| Community | |
| Principal area | |
| Country | Wales |
| Sovereign state | United Kingdom |
| Police | Dyfed-Powys |
| Fire | Mid and West Wales |
| Ambulance | Welsh |
| UK Parliament | |
Caio (or Caeo) is a village in the county of Carmarthenshire, south-west Wales, sited near to the Dolaucothi Gold Mines.