# Cardiff South and Penarth

South Wales. About 112,662 people (mid-2024 estimate) in 55 square kilometres.

Stephen Doughty has been the Labour (Co-op) MP for Cardiff South and Penarth since July 2024. They won by 11,767 votes on a 53.6% turnout.

Constituency. Code W07000091. In: [Wales](https://openindex.co.uk/wales)

## MP and the 2024 result

Stephen Doughty has been the Labour (Co-op) MP for Cardiff South and Penarth since July 2024.
They won by 11,767 votes on a 53.6% turnout.

MP: [Stephen Doughty](https://members.parliament.uk/member/4264) (Labour (Co-op)).

### General election, 4 July 2024: Cardiff South and Penarth

| Candidate | Party | Votes | Share |
| --- | --- | --- | --- |
| Stephen Doughty (elected) | Labour and Co-operative Party | 17,428 | 44.5% |
| Anthony Slaughter | Green Party | 5,661 | 14.5% |
| Ellis Smith | Conservative | 5,459 | 13.9% |
| Simon Llewellyn | Reform UK | 4,493 | 11.5% |
| Sharifah Rahman | Plaid Cymru | 3,227 | 8.2% |
| Alex Wilson | Liberal Democrat | 2,908 | 7.4% |

Electorate 73,060. Turnout 53.6%. Majority 11,767 (30.0%). Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: House of Commons Library, UK Parliament election results. https://electionresults.parliament.uk/elections/3366

MP as of 18 October 2026. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.

## Key figures

- **Majority, 2024 general election: 30.0%** (July 2024). The winner in Cardiff South and Penarth had a majority of 30.0% of valid votes at the general election on 4 July 2024 (House of Commons Library). Joint 94th largest majority of 650. Source: UK Parliament election results, July 2024. Published 4 July 2024. https://openindex.co.uk/constituency/cardiff-south-and-penarth#f-ge2024-majority
- **Turnout, 2024 general election: 53.6%** (July 2024). Turnout in Cardiff South and Penarth at the general election on 4 July 2024 was 53.6% (House of Commons Library). Joint 128th lowest turnout of 650. Source: UK Parliament election results, July 2024. Published 4 July 2024. https://openindex.co.uk/constituency/cardiff-south-and-penarth#f-ge2024-turnout
- **Population: 106,453** (2021). Cardiff South and Penarth had 106,453 usual residents at the census (ONS Census 2021). 201st most populated of 650. Source: Census 2021, England and Wales and Scotland's Census 2022 and Census 2021, Northern Ireland, 2021. Published 21 July 2026. https://openindex.co.uk/constituency/cardiff-south-and-penarth#f-population
- **People in radon Affected Area squares: 29%** (2022). About 29% of people in Cardiff South and Penarth live in a 1 km square that the radon atlas marks as a radon Affected Area. UK 44%. Source: Worked out by Open Index from the UKHSA and BGS radon atlas and census output areas. Published 1 December 2022. https://openindex.co.uk/constituency/cardiff-south-and-penarth#f-radon-affected-share

## On the map

- [Radon Affected Area by constituency](https://openindex.co.uk/map/radon-affected-areas?place=W07000091) (Worked out by Open Index · 2022): About 29% of people in Cardiff South and Penarth live in a 1 km square that the radon atlas marks as a radon Affected Area.
- [Average house price by council](https://openindex.co.uk/map/house-prices?place=W07000091) (UK House Price Index · August 2026): Published for whole councils, so the map colours all of Vale of Glamorgan, where most of this constituency lies. The outline is Cardiff South and Penarth.
- [Crime and ASB by council](https://openindex.co.uk/map/recorded-crime?place=W07000091) (Police recorded crime and outcomes (data.police.uk) · August 2026): Published for whole councils, so the map colours all of Vale of Glamorgan, where most of this constituency lies. The outline is Cardiff South and Penarth.
- [Population by constituency](https://openindex.co.uk/map/population?place=W07000091) (Census 2021, England and Wales): Cardiff South and Penarth had 106,453 usual residents at the census.

## How Cardiff South and Penarth compares

Each constituency against every other constituency the measure covers.

| Measure | Cardiff South and Penarth | Rank | Compared with |
| --- | --- | --- | --- |
| Majority, 2024 general election | 30.0% | joint 94th largest majority | 650 constituencies, UK · Jul 2024 |
| Turnout, 2024 general election | 53.6% | joint 128th lowest turnout | 650 constituencies, UK · Jul 2024 |
| Population | 106,453 | 201st most populated | 650 constituencies, UK · 2021 |
| People in radon Affected Area squares | 29% | joint 276th fewest people in radon Affected Areas | 650 constituencies, UK · 2022 |

## What is the population of Cardiff South and Penarth?

Cardiff South and Penarth had 106,453 usual residents at the census.
Cardiff South and Penarth is the 201st most populated of 650 in the UK.

## Figures for the whole of Vale of Glamorgan

Most of Cardiff South and Penarth lies in Vale of Glamorgan. These figures are published for the whole of Vale of Glamorgan, not for constituencies, so they describe the council and not Cardiff South and Penarth itself. [See Vale of Glamorgan](https://openindex.co.uk/vale-of-glamorgan)

- **Average house price: £300,358** (August 2026). Vale of Glamorgan’s average house price was £300,358 in August 2026 (HM Land Registry). Up 3.2% in a year. Source: UK House Price Index, August 2026. Published 21 October 2026.
- **Median full-time pay: £38,656** (2025). Full-time workers living in Vale of Glamorgan earned a median of £38,656 in 2025 (ONS earnings survey). 169th highest paid of 348. Source: Annual Survey of Hours and Earnings, 2025. Published 23 October 2025.
- **House price to pay: 7.8×** (2025). A home in Vale of Glamorgan costs 7.8 times local full-time pay. Joint 140th least affordable of 348. Source: Worked out by Open Index from the UK House Price Index and the ONS earnings survey. Published 21 October 2026.
- **Population estimate: 135,362** (2025). Vale of Glamorgan’s population was an estimated 135,362 in mid-2025 (ONS population estimates). No change in a year. Source: Mid-year population estimates, 2025. Published 1 October 2026.

## Cardiff South and Penarth in brief

The winner in Cardiff South and Penarth had a majority of 30.0% of valid votes at the general election on 4 July 2024.
Turnout in Cardiff South and Penarth at the general election on 4 July 2024 was 53.6%.
Cardiff South and Penarth had 106,453 usual residents at the census.
About 29% of people in Cardiff South and Penarth live in a 1 km square that the radon atlas marks as a radon Affected Area.

## About

- Type: Constituency
- Code: W07000091
- Council: [Vale of Glamorgan †](https://openindex.co.uk/vale-of-glamorgan)
- Nation: [Wales](https://openindex.co.uk/wales)
- Area: 55.17 km²
- People, mid-2024: 112,662*
- Wards: 11
- Middle areas: 12
- Neighbourhoods: 64
- Output areas: 328

* People: worked out by Open Index from neighbourhood estimates, shared out by where people lived at the census (by area in Northern Ireland). This area's edges do not follow neighbourhood edges, so the figure is close but not exact.
† Best fit: the council this constituency mostly lies in. Its edges do not follow it.

## Next door

[Vale of Glamorgan](https://openindex.co.uk/constituency/vale-of-glamorgan), [Cardiff West](https://openindex.co.uk/constituency/cardiff-west), [Cardiff East](https://openindex.co.uk/constituency/cardiff-east), [Cardiff North](https://openindex.co.uk/constituency/cardiff-north)

## Similar places

Constituencies with the closest mix of age and density. [Cardiff East](https://openindex.co.uk/constituency/cardiff-east), [Cardiff West](https://openindex.co.uk/constituency/cardiff-west), [Newport East](https://openindex.co.uk/constituency/newport-east), [Swansea West](https://openindex.co.uk/constituency/swansea-west), [Cardiff North](https://openindex.co.uk/constituency/cardiff-north), [Pontypridd](https://openindex.co.uk/constituency/pontypridd).

## Latest updates for Cardiff South and Penarth

- August 2026 house prices published: HM Land Registry and partners · Oct 2026.
- September 2026 rent published: ONS private rents · Oct 2026.
- Dental practices updated: NHS England · Oct 2026.
- Schools updated: Ofsted · Oct 2026.

The same figures as JSON: https://openindex.co.uk/v1/places/W07000091

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/constituency/cardiff-south-and-penarth, or to one figure with its anchor, https://openindex.co.uk/constituency/cardiff-south-and-penarth#f-ge2024-majority.

Open Index's own text and the figures it works out are licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source data keeps its publishers' licences, named with each figure. Give each figure's period and source with it.

Snapshot 2026.10.9. The HTML page: https://openindex.co.uk/constituency/cardiff-south-and-penarth