Llanblethian
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|---|---|
 View of Llanblethian looking north towards St John the Baptist Church | |
  Llanblethian Location within the Vale of Glamorgan | |
| OS grid reference | SS986741 |
| Community | |
| Principal area | |
| Preserved county | |
| Country | Wales |
| Sovereign state | United Kingdom |
| Post town | COWBRIDGE |
| Postcode district | CF71 |
| Dialling code | 01446 |
| Police | South Wales |
| Fire | South Wales |
| Ambulance | Welsh |
| UK Parliament | |
| Senedd Cymru – Welsh Parliament | |
Llanblethian (Welsh: Llanfleiddian) is a village in the Vale of Glamorgan in Wales which sits upon the River Thaw. It makes up part of the community of Cowbridge with Llanblethian, which consists of the village itself, the larger market town of Cowbridge and Aberthin.
Llanblethian first came to prominence as one of the manor lordships created by the Norman lords following the Norman invasion of Wales. It was first ruled by the St. Quentins before being taken over by the Siwards. Under the Norman lordship power in the region shifted from the village to nearby Cowbridge, where manorial affairs were conducted. Llanblethian has several fine large buildings including an early 18th century great house, a 12th-century church dedicated to St John the Baptist and its own castle, a largely ruinous structure but with a fine gatehouse known locally as St Quintins Castle.