Rhayader

Rhayader (; Welsh: Rhaeadr Gwy; pronounced) is a market town and community in Powys, Wales, within the historic county of Radnorshire. The town is 20 miles (32 km) from the source of the River Wye on Plynlimon, the highest point of the Cambrian Mountains, and is located at the junction of the A470 road and the A44 road 13 miles (21 km) north of Builth Wells and 30 miles (48 km) east of Aberystwyth.

The 2011 census recorded the population at 2,088, with 55% of the community having some form of Welsh identity. The community is the largest in Wales by area, with 137.31 km (53.02 sq mi). It includes the Elan Valley.

Rhayader holds the record for the lowest-ever temperature recorded in Wales, -23.3 °C on 21 January 1940.