Brecon and Radnorshire (UK Parliament constituency)

Brecon and Radnorshire
Former county constituency
for the House of Commons
Boundary of Brecon and Radnorshire in Wales
Preserved countyPowys
Population69,197 (2011 census)
Electorate53,032 (April 2019)
Major settlementsBrecon, Crickhowell, Ystradgynlais, Knighton, Llandrindod Wells
19182024
SeatsOne
Created fromBreconshire
Radnorshire
Replaced byBrecon, Radnor and Cwm Tawe
SeneddBrecon and Radnorshire, Mid and West Wales

Brecon and Radnorshire (Welsh: Brycheiniog a Sir Faesyfed) was a county constituency in Wales of the House of Commons of the Parliament of the United Kingdom. Created in 1918, it elected one Member of Parliament (MP) by the first-past-the-post system of election.

The constituency was abolished as part of the 2023 periodic review of Westminster constituencies and under the June 2023 final recommendations of the Boundary Commission for Wales. The entire constituency became part of the newly named constituency of Brecon, Radnor and Cwm Tawe.