| Mynydd Machen or Machen Mountain | |
|---|---|
 Looking up towards Mynydd Machen | |
| Highest point | |
| Elevation | 362 m (1,188 ft) |
| Prominence | 185 m (607 ft) |
| Listing | Marilyn |
| Coordinates | 51°36′13″N 3°07′20″W / 51.6036°N 3.1222°W |
| Naming | |
| Language of name | Welsh |
| Geography | |
 | |
| Location | Caerphilly, Wales |
| OS grid | ST 224900 |
| Topo map | OS Landranger 171 / Explorer 152 |
Mynydd Machen or Machen Mountain is a 362-metre-high (1,188 ft) hill lying between the town of Risca and the village of Machen in Caerphilly County Borough in south Wales. Its summit is crowned by a trig point and a mast.