Nant Glas (or Nant-glas) is a village in the Elan Valley near Rhayader and Llandrindod Wells in Powys, Wales. It is on a side road between the A44 to the north-east and the A470 to the south-west.
The Willow Globe Theatre is close to the village, just off the A470.
Coordinates: 52°16′30″N 3°28′19″W / 52.275°N 03.472°W / 52.275; -03.472