- For Trevithick's Pen-y-darren locomotive, see Richard Trevithick.
| Penydarren | |
|---|---|
  Penydarren Location within Merthyr Tydfil | |
| Population | 5,419 (2011) |
| OS grid reference | SO055075 |
| Principal area | |
| Preserved county | |
| Country | Wales |
| Sovereign state | United Kingdom |
| Post town | MERTHYR TYDFIL |
| Postcode district | CF47 |
| Dialling code | 01685 |
| Police | South Wales |
| Fire | South Wales |
| Ambulance | Welsh |
| UK Parliament | |
| Senedd Cymru – Welsh Parliament | |
Penydarren is a community and electoral ward in Merthyr Tydfil County Borough in Wales.