List of parliamentary constituencies in Mid Glamorgan

The Preserved county of Mid Glamorgan is divided into 6 parliamentary constituencies, one of which is shared with Gwent. The current boundaries have been effective since the 2007 National Assembly for Wales election and the 2010 United Kingdom general election.

Constituencies

Name	1997 to 2010	From 2010
Bridgend CC * Cynon Valley CC Merthyr Tydfil and Rhymney CC (part) Ogmore CC * Pontypridd CC * Rhondda CC 1997-2010 Vale of Glamorgan CC (covered very small part of the Preserved County) * pre-2010 parts coloured white were included and were in South Glamorgan (in the case of Ogmore the part was too small to show)	Parliamentary constituencies in Mid Glamorgan	Proposed Revision

  Conservative †   Labour ‡

Constituency	Electorate	Majority	Member of Parliament		Nearest opposition		Map reference above
Bridgend CC	63,303	1,157	bgcolor="Template:Conservative Party (UK)/meta/color" |	Jamie Wallis †	bgcolor="Template:Labour Party (UK)/meta/color" |	Madeleine Moon ‡	1
Cynon Valley CC	51,134	8,822	bgcolor="Template:Labour Party (UK)/meta/color" |	Beth Winter ‡	bgcolor="Template:Conservative Party (UK)/meta/color" |	Pauline Church †	2
Merthyr Tydfil and Rhymney CC (western part is in Mid Glamorgan)	56,322	10,606	bgcolor="Template:Labour Party (UK)/meta/color" |	Gerald Jones ‡	bgcolor="Template:Conservative Party (UK)/meta/color" |	Sarah Jones †	3
Ogmore CC	57,581	7,805	bgcolor="Template:Labour Party (UK)/meta/color" |	Chris Elmore ‡	bgcolor="Template:Conservative Party (UK)/meta/color" |	Sadie Vidal †	4
Pontypridd CC	60,327	5,887	bgcolor="Template:Labour Party (UK)/meta/color" |	Alex Davies-Jones ‡	bgcolor="Template:Conservative Party (UK)/meta/color" |	Sam Trask †	5
Rhondda CC	50,262	11,440	bgcolor="Template:Labour Party (UK)/meta/color" |	Chris Bryant ‡	bgcolor="Template:Conservative Party (UK)/meta/color" |	Hannah Jarvis †	6

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.

See also

• List of Parliamentary constituencies in Wales

The implemented Fifth Periodic Review of Westminster constituencies.