| Garnddyrys Forge | |
|---|---|
 Remains of the ironworks and tramroad | |
  Location of Garnddyrys Forge | |
 | |
| Operated | 1817–61 |
| Coordinates | 51°48′05″N 3°04′37″W / 51.801423°N 3.0769175°W |
| Industry | Iron foundry |
| Products | Wrought iron |
Garnddyrys Forge was an iron foundry in Wales that operated from about 1817 to 1860 about 3 km (2 miles) north of Blaenavon in Wales, lying on a tramroad between Blaenavon and the Brecknock and Abergavenny Canal. At one time 450 people lived around the ironworks. It became isolated when the railway took a different route to Blaenavon, and was abandoned. Although little now is visible, it is archaeologically well-preserved.