# Ynys Môn

North west Wales. About 69,097 people (mid-2024 estimate) in 715 square kilometres.

Llinos Medi has been the Plaid Cymru MP for Ynys Môn since July 2024. They won by 637 votes on a 61.4% turnout.

Constituency. Code W07000112. In: [Wales](https://openindex.co.uk/wales)

## MP and the 2024 result

Llinos Medi has been the Plaid Cymru MP for Ynys Môn since July 2024.
They won by 637 votes on a 61.4% turnout.

MP: [Llinos Medi](https://members.parliament.uk/member/5085) (Plaid Cymru).

### General election, 4 July 2024: Ynys Môn

| Candidate | Party | Votes | Share |
| --- | --- | --- | --- |
| Llinos Medi (elected) | Plaid Cymru | 10,590 | 32.5% |
| Virginia Crosbie | Conservative | 9,953 | 30.5% |
| Ieuan Williams | Labour | 7,619 | 23.4% |
| Emmett Jenner | Reform UK | 3,223 | 9.9% |
| Martin Schwaller | Green Party | 604 | 1.9% |
| Leena Farhat | Liberal Democrat | 439 | 1.3% |
| Sir Grumpus L Shorticus | Official Monster Raving Loony Party | 156 | 0.5% |
| Sam Wood | Libertarian Party | 44 | 0.1% |

Electorate 53,141. Turnout 61.4%. Majority 637 (2.0%). 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/3898

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: 2.0%** (July 2024). The winner in Ynys Môn had a majority of 2.0% of valid votes at the general election on 4 July 2024 (House of Commons Library). Joint 46th smallest majority of 650. Source: UK Parliament election results, July 2024. Published 4 July 2024. https://openindex.co.uk/constituency/ynys-mon#f-ge2024-majority
- **Turnout, 2024 general election: 61.4%** (July 2024). Turnout in Ynys Môn at the general election on 4 July 2024 was 61.4% (House of Commons Library). Joint 278th highest turnout of 650. Source: UK Parliament election results, July 2024. Published 4 July 2024. https://openindex.co.uk/constituency/ynys-mon#f-ge2024-turnout
- **Population: 68,863** (2021). Ynys Môn had 68,863 usual residents at the census (ONS Census 2021). 3rd least 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/ynys-mon#f-population
- **People in radon Affected Area squares: 63%** (2022). About 63% of people in Ynys Môn 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/ynys-mon#f-radon-affected-share

## On the map

- [Radon Affected Area by constituency](https://openindex.co.uk/map/radon-affected-areas?place=W07000112) (Worked out by Open Index · 2022): About 63% of people in Ynys Môn 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=W07000112) (UK House Price Index · August 2026): Published for whole councils, so the map colours all of Isle of Anglesey, where most of this constituency lies. The outline is Ynys Môn.
- [Crime and ASB by council](https://openindex.co.uk/map/recorded-crime?place=W07000112) (Police recorded crime and outcomes (data.police.uk) · August 2026): Published for whole councils, so the map colours all of Isle of Anglesey, where most of this constituency lies. The outline is Ynys Môn.
- [Population by constituency](https://openindex.co.uk/map/population?place=W07000112) (Census 2021, England and Wales): Ynys Môn had 68,863 usual residents at the census.

## How Ynys Môn compares

Each constituency against every other constituency the measure covers.

| Measure | Ynys Môn | Rank | Compared with |
| --- | --- | --- | --- |
| Majority, 2024 general election | 2.0% | joint 46th smallest majority | 650 constituencies, UK · Jul 2024 |
| Turnout, 2024 general election | 61.4% | joint 278th highest turnout | 650 constituencies, UK · Jul 2024 |
| Population | 68,863 | 3rd least populated | 650 constituencies, UK · 2021 |
| People in radon Affected Area squares | 63% | joint 239th most people in radon Affected Areas | 650 constituencies, UK · 2022 |

## What is the population of Ynys Môn?

Ynys Môn had 68,863 usual residents at the census.
Ynys Môn is the 3rd least populated of 650 in the UK.

## Figures for the whole of Isle of Anglesey

Most of Ynys Môn lies in Isle of Anglesey. These figures are published for the whole of Isle of Anglesey, not for constituencies, so they describe the council and not Ynys Môn itself. [See Isle of Anglesey](https://openindex.co.uk/isle-of-anglesey)

- **Average house price: £236,308** (August 2026). Isle of Anglesey’s average house price was £236,308 in August 2026 (HM Land Registry). Down 0.4% in a year. Source: UK House Price Index, August 2026. Published 21 October 2026.
- **Median full-time pay: £35,709** (2025). Full-time workers living in Isle of Anglesey earned a median of £35,709 in 2025 (ONS earnings survey). 85th lowest paid of 348. Source: Annual Survey of Hours and Earnings, 2025. Published 23 October 2025.
- **House price to pay: 6.6×** (2025). A home in Isle of Anglesey costs 6.6 times local full-time pay. Joint 136th most 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: 68,607** (2025). Isle of Anglesey’s population was an estimated 68,607 in mid-2025 (ONS population estimates). Down 0.4% in a year. Source: Mid-year population estimates, 2025. Published 1 October 2026.

## Ynys Môn in brief

The winner in Ynys Môn had a majority of 2.0% of valid votes at the general election on 4 July 2024.
Turnout in Ynys Môn at the general election on 4 July 2024 was 61.4%.
Ynys Môn had 68,863 usual residents at the census.
About 63% of people in Ynys Môn live in a 1 km square that the radon atlas marks as a radon Affected Area.

## About

- Type: Constituency
- Code: W07000112
- Council: [Isle of Anglesey †](https://openindex.co.uk/isle-of-anglesey)
- Nation: [Wales](https://openindex.co.uk/wales)
- Area: 715 km²
- People, mid-2024: 69,097*
- Wards: 14
- Middle areas: 9
- Neighbourhoods: 41
- Output areas: 229

* 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

[Bangor Aberconwy](https://openindex.co.uk/constituency/bangor-aberconwy), [Dwyfor Meirionnydd](https://openindex.co.uk/constituency/dwyfor-meirionnydd)

## Similar places

Constituencies with the closest mix of age and density. [Monmouthshire](https://openindex.co.uk/constituency/monmouthshire), [Mid and South Pembrokeshire](https://openindex.co.uk/constituency/mid-and-south-pembrokeshire), [Clwyd East](https://openindex.co.uk/constituency/clwyd-east), [Caerfyrddin](https://openindex.co.uk/constituency/caerfyrddin), [Ceredigion Preseli](https://openindex.co.uk/constituency/ceredigion-preseli), [Dwyfor Meirionnydd](https://openindex.co.uk/constituency/dwyfor-meirionnydd).

## Latest updates for Ynys Môn

- 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/W07000112

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/constituency/ynys-mon, or to one figure with its anchor, https://openindex.co.uk/constituency/ynys-mon#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/ynys-mon