Merthyr Tydfil and Aberdare

Merthyr Tydfil and Aberdare 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.

Boundaries

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

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, the constituency now comprises the following from the 2024 general election:

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.