| Country: | Wales |
| Official Name: | Aberthin |
| Coordinates: | 51.467°N -3.4295°W |
| Static Image Name: | Aberthin1.jpg |
| Static Image Caption: | Aberthin |
| Unitary Wales: | Vale of Glamorgan |
| Lieutenancy Wales: | South Glamorgan |
| Constituency Welsh Assembly: | Vale of Glamorgan |
| Constituency Westminster: | Vale of Glamorgan |
| Community Wales: | Cowbridge with Llanblethian |
| Post Town: | Cowbridge |
| Postcode District: | CF71 |
| Postcode Area: | CF |
| Os Grid Reference: | ST008752 |
Aberthin is a small village, just outside Cowbridge in the Vale of Glamorgan, South Wales, on the north side of a shallow valley, less than a mile northeast of Cowbridge across the A48 road. Cowbridge Comprehensive School lies just to the southwest of the village. About 250 metres to the south is an old quarry, with a "faulted strip of grey oolite".[1] Aberthin is also the name of a brook, the River Aberthin.[2] The village was served by the Aberthin Platform railway station between 1905 and 1920, now a field to the west of Aberthin.
Thomas Morgan recorded an early belief that the village had been a place of druidic sacrifices, and that the name derived from the word Abertha (sacrifice). However, this derivation is now considered a folk etymology.[3] As the Nant y Berthyn's confluence (or "Aber" in Welsh) with the River Thaw located just to the west of the village's centre, the name is most likely a contraction of "Aber-Nant-y-Berthyn".
It has no shops, but does have two pubs, a village hall which when built in 1749 was created as Wales's second purpose-built Calvinistic Methodist meeting house,[4] and a notable tree in the middle of the roundabout. The Methodist church and village was visited in 1746 by Howell Harries and it was at the church where Peter Williams gave a speech in which he was disowned by the Methodists.[5] Houses in the area include Llansannor Court and Great House, Aberthin.[6]
The village hall committee organises many events throughout the year, such as a duck race (where plastic yellow ducks are raced down the stream), a free bonfire and fireworks display (held on the Downs overlooking the village), quiz nights, amateur dramatics, barn dances, and an annual Village Day, which has a barbecue, live music and a dog show.