Ystrad Mynach
| Ystrad Mynach | |
|---|---|
Location within Caerphilly | |
| Population | 19,204 (2011 census) |
| OS grid reference | ST145945 |
| Principal area | |
| Preserved county | |
| Country | Wales |
| Sovereign state | United Kingdom |
| Post town | HENGOED |
| Postcode district | CF82 |
| Dialling code | 01443 |
| Police | Gwent |
| Fire | South Wales |
| Ambulance | Welsh |
| UK Parliament | |
| Senedd Cymru – Welsh Parliament | |
Ystrad Mynach is a town in the Rhymney Valley in the Caerphilly County Borough, within the ancient county of Glamorgan, Wales, and is 5 miles (8.0 km) north of the town of Caerphilly. The urban area had a population of 19,204 in 2011. Before the Industrial Revolution and the coming of coal mining in the South Wales Coalfield the valley was rural and farmed. It lies in the community of Gelligaer.