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UK Parliamentary Constituency and Ward Maps

Merthyr Tydfil and Rhymney Boundary Change Map

Compare the former Merthyr Tydfil and Rhymney boundary with Merthyr Tydfil and Aberdare from July 2024. Buy a vector comparison map for £20, prepared and sent by email, or order a printed map.

Compare the boundaries

RetainedRemovedAdded

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Dashed line: former Merthyr Tydfil and Rhymney. Solid line: Merthyr Tydfil and Aberdare from 4 July 2024.

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See the boundary change figures

2019 and 2024 boundary comparison

Merthyr Tydfil and Rhymney: 2019 and 2024 constituency boundary comparison with Merthyr Tydfil and Aberdare

See the full boundary change figures

What changed in 2024?

The former constituency was split between successor constituencies. The map compares the old area with its closest successor, Merthyr Tydfil and Aberdare.

Former constituencyMerthyr Tydfil and Rhymney (W07000071)
Closest successorMerthyr Tydfil and Aberdare (W07000099)
New boundaries in use4 July 2024
Old premises retained in this successor78.6%

21.4% of the old constituency’s residential premises moved to other constituencies.

About the comparison map

The colours show land retained, removed and added when this former constituency is compared with its closest successor.

The tables show every linked constituency. Their percentages measure residential premises, not votes, electors or land area.

The preview uses 20-metre generalised boundaries. Small differences along an edge can reflect mapping detail.

View sources and dates

Where did the old area go?

Share of residential premises in the former Merthyr Tydfil and Rhymney constituency.

Constituency from July 2024ShareMap
Merthyr Tydfil and Aberdare (closest successor)78.6%View map
Blaenau Gwent and Rhymney21.4%View map

Rounded values may not add up to exactly 100%.

Where did Merthyr Tydfil and Aberdare come from?

Share of residential premises in the successor constituency.

Former constituencyShareComparison
Merthyr Tydfil and Rhymney58.5%This comparison
Cynon Valley41.5%Compare
Brecon and Radnorshire<0.1%Compare

Ward maps within Merthyr Tydfil and Aberdare

The source lists 17 whole wards and 1 partial ward, using 2023 ward boundaries.

Aberaman

Whole ward

Aberdare East

Whole ward

Aberdare West and Llwydcoed

Whole ward

Bedlinog and Trelewis

Whole ward

Cwmbach

Whole ward

Cyfarthfa

Whole ward

Dowlais and Pant

Whole ward

Gurnos

Whole ward

Hirwaun, Penderyn and Rhigos

Whole ward

Merthyr Vale

Whole ward

Mountain Ash

Part of ward

Park

Whole ward

Pen-y-waun

Whole ward

Penydarren

Whole ward

Plymouth

Whole ward

Town

Whole ward

Treharris

Whole ward

Vaynor

Whole ward

These are ward-to-constituency memberships, not changes to ward boundaries. Links appear where the ward code exists in our map catalogue.

Sources and dates

Comparison figures: House of Commons Library, workbook dated 2023-07-13. Constituency changes took effect at the 2024 general election. Ward memberships use 2023 boundaries.

Map outlines: ONS December 2022 (W07000071) and July 2024 (W07000099), 20-metre generalised boundaries. The map differences and premises figures are separate calculations. Boundary sources and method.

Source: Office for National Statistics licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right 2022 and 2024.

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