Merthyr Tydfil and Aberdare (UK Parliament constituency)

Merthyr Tydfil and Aberdare (Welsh: Merthyr Tudful ac Aberdâr) is a constituency of the House of Commons in the UK Parliament, first contested at the 2024 United Kingdom general election, following the 2023 Periodic Review of Westminster constituencies. It is currently represented by Gerald Jones of the Labour Party, who was previously the MP for the predecessor constituency of Merthyr Tydfil and Rhymney from 2015 to 2024.

Merthyr Tydfil and Aberdare
constituency for the House of Commons
Show location of constituency Show location within Wales Interactive map of the constituency.
Location of the constituency within Wales
Electorate	74,805 (March 2020)[1]
Major settlements	Merthyr Tydfil, Aberdare, Hirwaun, Treharris, Cwmbach
Current constituency
Created	2024
Member of Parliament	Gerald Jones (Labour)
Seats	One

Boundaries

Under the 2023 review, the constituency was defined as being composed of the following, as they existed on 1 December 2020:^[2]

• The County Borough of Merthyr Tydfil.

• The County Borough of Rhondda Cynon Taf wards of: Aberaman North; Aberaman South; Aberdare East; Aberdare West/Llwydcoed; Cwmbach; Hirwaun; Pen-y-waun; Rhigos.

Following local government boundary reviews which came into effect in May 2022,^[3][4] the constituency now comprises the following from the 2024 general election:^[5]

• The County Borough of Merthyr Tydfil.

• The County Borough of Rhondda Cynon Taf wards of: Aberaman; Aberdare East; Aberdare West and Llwydcoed; Cwmbach; Hirwaun, Penderyn and Rhigos; Pen-y-waun.

Merthyr Tydfil County Borough previously formed the majority of the abolished Merthyr Tydfil and Rhymney constituency; areas in Rhondda Cynon Taf were part of the abolished Cynon Valley constituency.^[6]

Election results

Elections in the 2020s

General election 2024: Merthyr Tydfil and Aberdare^[7][8]

Party		Candidate	Votes	%	±%
	Labour	Gerald Jones	15,791	44.8	−6.9
	Reform UK	Gareth Thomas	8,344	23.7	+13.0
	Plaid Cymru	Francis Daniel Whitefoot	4,768	13.5	+5.4
	Conservative	Amanda Jenner	2,687	7.6	−13.0
	Liberal Democrats	Jade Smith	1,276	3.6	+0.3
	Green	David Griffin	1,231	3.5	N/A
	Workers Party	Anthony Cole	531	1.5	N/A
	Independent	Lorenzo De Gregori	375	1.1	N/A
	Communist	Bob Davenport	212	0.6	N/A
Majority			7,447	21.2	N/A
Turnout			35,215	47.3	−10.3
Registered electors			74,460
	Labour hold		Swing	−9.9

Elections in the 2010s

2019 notional result [a] [9]
Party		Vote	%
	Labour	22,292	51.7
	Conservative	8,882	20.6
	Brexit Party	4,621	10.7
	Plaid Cymru	3,513	8.1
	Independent	1,482	3.4
	Liberal Democrats	1,434	3.3
	Other (2 candidates)	882	2.1
Majority		13,410	31.1
Turnout		43,106	57.6
Electorate		74,805

Notes

1. Estimate of the 2019 general election result as if the revised boundaries recommended under the 2023 boundary review were in place