Williamstown
| |
|---|---|
  Williamstown Location within Rhondda Cynon Taf | |
| OS grid reference | ST002907 |
| Principal area | |
| Preserved county | |
| Country | Wales |
| Sovereign state | United Kingdom |
| Post town | TONYPANDY |
| Postcode district | CF40 |
| Dialling code | 01443 |
| Police | South Wales |
| Fire | South Wales |
| Ambulance | Welsh |
| UK Parliament | |
| Senedd Cymru – Welsh Parliament | |
Williamstown (Welsh: Trewiliam) is a village in the Rhondda Valley in the county borough of Rhondda Cynon Taf, within the historic county boundaries of Glamorgan, Wales. Williamstown was founded in the 1870s, is located at the foot of Mynydd Dinas and is a district of neighbouring village Penygraig.