# Ystrad Mynach Town in Caerphilly, Wales. Ystrad Mynach is a town in Caerphilly, Wales. Median sale price £196,000 in 2025. Recorded crime 111.8 per 1,000 people. About 12,058 people. Town. Code W45000501. In: [Towns](https://openindex.co.uk/places/towns) › [Caerphilly](https://openindex.co.uk/caerphilly) Ystrad Mynach is an ONS built-up area: the land built up as one town, whatever council it is in. Figures for Ystrad Mynach add up the census output areas (or, for claimants, the neighbourhoods) that sit mostly inside it, so they are close to, but not exactly, the town’s own. ## Key figures - **Median sale price: £196,000** (2025). The median price paid for a home in Ystrad Mynach was £196,000 in 2025. 221st cheapest of 1,092. Source: Worked out by Open Index from HM Land Registry Price Paid Data. Published 28 September 2026. https://openindex.co.uk/town/ystrad-mynach#f-house-sales-median-price - **Population: 11,856** (2021). Ystrad Mynach had 11,856 usual residents at the census (ONS Census 2021). 344th least populated of 1,209. 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/town/ystrad-mynach#f-population - **People in radon Affected Area squares: 98%** (2022). About 98% of people in Ystrad Mynach 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/town/ystrad-mynach#f-radon-affected-share - **Gigabit broadband coverage: 94.7%** (January 2026). In Ystrad Mynach, 94.7% of homes and businesses could get gigabit-capable broadband in January 2026 (Ofcom). UK 87.8%. Source: Connected Nations (Ofcom), January 2026. Published 13 May 2026. https://openindex.co.uk/town/ystrad-mynach#f-gigabit-coverage ## On the map - [Radon Affected Area by town](https://openindex.co.uk/map/radon-affected-areas?place=W45000501) (Worked out by Open Index · 2022): About 98% of people in Ystrad Mynach live in a 1 km square that the radon atlas marks as a radon Affected Area. - [Sales per year by town](https://openindex.co.uk/map/house-sales-per-year?place=W45000501) (Worked out by Open Index · 2025): 160 homes were sold in Ystrad Mynach in 2025. - [Crime and ASB by town](https://openindex.co.uk/map/recorded-crime?place=W45000501) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for Ystrad Mynach. - [Population by town](https://openindex.co.uk/map/population?place=W45000501) (Census 2021, England and Wales): Ystrad Mynach had 11,856 usual residents at the census. ## How Ystrad Mynach compares Each town against every other town the measure covers. | Measure | Ystrad Mynach | Rank | Compared with | | --- | --- | --- | --- | | Median sale price | £196,000 | 34th most expensive | 76 towns, Wales · 2025 | | Population | 11,856 | 29th least populated | 76 towns, Wales · 2021 | | People in radon Affected Area squares | 98% | joint 33rd fewest people in radon Affected Areas | 76 towns, Wales · 2022 | | Gigabit broadband coverage | 94.7% | joint 25th highest | 76 towns, Wales · Jan 2026 | ## Is Ystrad Mynach safe? What police records show In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Ystrad Mynach at a rate of 111.8 per 1,000 people. That compares with 96.7 per 1,000 people across Wales. In August 2026 alone, 128 cases of crime and anti-social behaviour were recorded in Ystrad Mynach. In the 12 months to August 2026, the most common types were violence and sexual offences (522), other crime (254) and anti-social behaviour (245). A year earlier, the recorded crime rate in Ystrad Mynach was 97.9 per 1,000 people. Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates. Rates are per resident, so places that many people work in or visit, such as Westminster, the City of London and other city centres, have far higher rates than their residents alone would suggest. ## Deprivation in Ystrad Mynach, neighbourhood by neighbourhood - Deprivation is ranked by neighbourhood, so Ystrad Mynach has no single figure. Of its 7 neighbourhoods with a rank: - Decile 1 (Wales’s most deprived 10%): 1 neighbourhood - Decile 3: 1 neighbourhood - Decile 5: 2 neighbourhoods - Decile 6: 2 neighbourhoods - Decile 9: 1 neighbourhood Source: Welsh Index of Multiple Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in Wales. ## Neighbourhoods in Ystrad Mynach | Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband | | --- | --- | --- | --- | --- | | [Caerphilly 008E](https://openindex.co.uk/caerphilly/neighbourhood/w01001418) | 1,399 | 101.3 per 1,000 | 3 | 50.1% | | [Caerphilly 012A](https://openindex.co.uk/caerphilly/neighbourhood/w01001363) | 1,800 | 70.4 per 1,000 | 6 | 98.0% | | [Caerphilly 012B](https://openindex.co.uk/caerphilly/neighbourhood/w01001364) | 1,779 | 99.5 per 1,000 | 1 | 100.0% | | [Caerphilly 012C](https://openindex.co.uk/caerphilly/neighbourhood/w01001365) | 1,931 | 62.4 per 1,000 | 5 | 98.4% | | [Caerphilly 013D](https://openindex.co.uk/caerphilly/neighbourhood/w01001432) | 2,753 | 88.4 per 1,000 | 6 | 92.3% | | [Caerphilly 013E](https://openindex.co.uk/caerphilly/neighbourhood/w01001433) | 1,360 | 171.2 per 1,000 | 5 | 95.0% | | [Caerphilly 013F](https://openindex.co.uk/caerphilly/neighbourhood/w01001434) | 1,373 | 264.2 per 1,000 | 9 | 97.3% | ## Your MP - [Caerphilly](https://openindex.co.uk/constituency/caerphilly): Chris Evans (Labour (Co-op)), MP since July 2024. As of 18 October 2026. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API. ## Council [Caerphilly](https://openindex.co.uk/caerphilly) ## Postcode districts covering Ystrad Mynach [CF82](https://openindex.co.uk/postcode/cf82) ## Middle areas in Ystrad Mynach [Hengoed & Maesycwmer](https://openindex.co.uk/caerphilly/hengoed-and-maesycwmer) ## Towns near Ystrad Mynach [Pontllanfraith](https://openindex.co.uk/town/pontllanfraith), [Blackwood](https://openindex.co.uk/town/blackwood), [Bargod](https://openindex.co.uk/town/bargod), [Caerphilly](https://openindex.co.uk/town/caerphilly), [Newbridge](https://openindex.co.uk/town/newbridge), [Risca](https://openindex.co.uk/town/risca) ## Ystrad Mynach in brief Ystrad Mynach is a town in Caerphilly, Wales. About 12,058 people lived in Ystrad Mynach in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £196,000 in 2025 across 160 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 111.8 per 1,000 people in the 12 months to August 2026 (police.uk). The median price paid for a home in Ystrad Mynach was £196,000 in 2025. Ystrad Mynach had 11,856 usual residents at the census. About 98% of people in Ystrad Mynach live in a 1 km square that the radon atlas marks as a radon Affected Area. In Ystrad Mynach, 94.7% of homes and businesses could get gigabit-capable broadband in January 2026. ## About - Type: Town - Code: W45000501 - Constituency: [Caerphilly †](https://openindex.co.uk/constituency/caerphilly) - Council: [Caerphilly †](https://openindex.co.uk/caerphilly) - Nation: [Wales](https://openindex.co.uk/wales) - Area: 3.79 km² - People, mid-2024: 12,058* - Neighbourhoods: 7 - Output areas: 37 * 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 constituency and council this town mostly lies in. Its edges do not follow theirs. ## Next door [Pontllanfraith](https://openindex.co.uk/town/pontllanfraith), [Blackwood](https://openindex.co.uk/town/blackwood), [Bargod](https://openindex.co.uk/town/bargod), [Caerphilly](https://openindex.co.uk/town/caerphilly), [Newbridge](https://openindex.co.uk/town/newbridge), [Risca](https://openindex.co.uk/town/risca) ## Latest updates for Ystrad Mynach - 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/W45000501 ## How to cite Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/town/ystrad-mynach, or to one figure with its anchor, https://openindex.co.uk/town/ystrad-mynach#f-house-sales-median-price. 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/town/ystrad-mynach