List of parliamentary constituencies in Powys

Powys is divided into two constituencies of the House of Commons of the UK Parliament (Westminster), which are also used for elections to the Senedd.^{[n 1]} The current boundaries have been effective since the 2007 National Assembly for Wales election and the 2010 UK general election.^[1]

Powys is one of the eight preserved counties of Wales, and has the name and boundaries of one of the 22 principal areas.

For Senedd elections, constituencies are grouped into additional member electoral regions, and changes to constituency boundaries mean, also, changes to regional boundaries.

Westminster boundaries

From 2024

2010 to 2024

Constituency	Boundaries
1. Brecon and Radnorshire CC (Westminster)	Parliamentary constituencies in Powys 2010
2. Montgomeryshire CC (Westminster)

Conservative † Liberal Democrat ¤

Constituency	Electorate	Majority	Member of Parliament		Nearest opposition		Map reference above
Brecon and Radnorshire	55,490	7,131		Fay Jones †		Jane Dodds ¤	1
Montgomeryshire	48,997	12,138		Craig Williams †		Kishan Devani ¤	2

1997 to 2010

Constituency	Boundaries
1. Brecon and Radnorshire CC (Westminster)	Parliamentary constituencies in Powys pre-2010
2. Montgomeryshire CC (Westminster)
3. Clwyd South CC (Westminster) (part)

The Clwyd South constituency was also partly a Clwyd constituency.

Proposed boundary changes

The Boundary Commission for Wales submitted their final proposals in respect of the Sixth Periodic Review of Westminster Constituencies (the 2018 review) in September 2018. Although the proposals were immediately laid before Parliament they were not brought forward by the Government for approval. Accordingly, they did not come into effect for the 2019 election which took place on 12 December 2019, and which was contested using the constituency boundaries in place since 2010.

Under the terms of the Parliamentary Voting System and Constituencies Act 2011, the Sixth Review was based on reducing the total number of MPs from 650 to 600 and a strict electoral parity requirement that the electorate of all constituencies should be within a range of 5% either side of the electoral quota.

On 24 March 2020, the Minister of State for the Cabinet Office, Chloe Smith, issued a written statement to Parliament setting out the Government's thinking with regard to parliamentary boundaries. They propose to bring forward primary legislation to remove the statutory obligation to implement the 2018 Boundary Review recommendations, as well as set the framework for future boundary reviews in time for the next review which is due to begin in early 2021 and report no later than October 2023. It is proposed that the number of constituencies now remains at the current level of 650, rather than being reduced to 600, while retaining the requirement that the electorate should be no more than /- 5% from the electoral quota.^[2]

Senedd boundaries

From 2007

Constituency	Senedd region	Constituency boundaries
1. Brecon and Radnorshire CC (Senedd)	Mid and West Wales	Senedd constituencies in Powys 2007
2. Montgomeryshire CC (Senedd)	Mid and West Wales

The Mid and West Wales region also includes five Dyfed constituencies and one Gwynedd constituency.

1999 to 2007

Constituency	Senedd region	Constituency boundaries
1. Brecon and Radnorshire CC (Senedd)	Mid and West Wales	Assembly constituencies in Powys pre-2007
2. Montgomeryshire CC (Senedd)	Mid and West Wales
3. Clwyd South CC (Senedd) (part)	North Wales

Results

Westminster elections

2005	2010	2015	2017	2019 (Aug)	2019 (Dec)

Assembly/Senedd elections

2007	2011	2016	2021

Historical representation by party

A cell marked → (with a different colour background to the preceding cell) indicates that the previous MP continued to sit under a new party name.

1832 to 1859

Conservative Peelite Whig

Constituency	1832	33	1835	40	1841	1847	50	1852	54	55	58
Montgomery Boroughs	Pugh	Edwards			Cholmondeley	Pugh
Montgomeryshire	C. Williams-Wynn						H. Williams-Wynn
Radnor Boroughs	Price					T. Lewis				G. Lewis
Radnorshire	T. Lewis		Wilkins	J. Walsh
Brecon	Watkins		C. M. Morgan			Watkins		C. R. Morgan	Watkins
Breconshire	Wood					Bailey					G. Morgan

1859 to 1885

Conservative Liberal

Constituency	1859	61	62	63	66	1868	69	70	75	77	1880	84
Montgomery Boroughs	Pugh	Willes-Johnson		C. Hanbury-Tracy						F. Hanbury-Tracy
Montgomeryshire	H. Williams-Wynn		C. Williams-Wynn jnr								Rendel
Radnor Boroughs	G. Lewis			Green-Price			Cavendish				Williams	Coltman-Rogers
Radnorshire	J. Walsh					A. Walsh					Green-Price
Brecon	Watkins				Gwyn¹		Villiers	Gwynne-Holford			Flower
Breconshire	G. Morgan								Fuller-Maitland

¹ original victor Pratt (Liberal) declared void on petition

1885 to 1918