| Country: | Wales |
| Official Name: | Cwmgiedd |
| Community Wales: | Ystradgynlais |
| Unitary Wales: | Powys |
| Lieutenancy Wales: | Powys |
| Constituency Westminster: | Brecon & Radnorshire |
| Post Town: | Swansea |
| Postcode District: | SA9 |
| Postcode Area: | SA |
| Dial Code: | 01639 |
| Os Grid Reference: | SN787115 |
| Coordinates: | 51.7891°N -3.7591°W |
Cwmgiedd is a small village beside the River Giedd[1] within the community of Ystradgynlais, Powys, Wales. It lies 22.5 km (15 miles) north-east of Swansea and 253 km (157 miles) west of London.
The Silent Village, a 1943 British propaganda film about the destruction by the Nazi occupiers of the Czech village Lidice, was filmed here.[2]