Treharris’s story
2 listed buildings
Cadw lists them inside Treharris’ built-up area.
47% of its homes were built before 1919, against 15% in the typical UK town.
Explore the history →
TreharrisMid Glamorgan
This town in Mid Glamorgan, Wales has a population of 5,042.
7 places within 12 milesMap →
Photo: nantcoly · CC BY-SA 2.0
Population
5,042
Census 2021 · Merthyr Tydfil council
Median home
£136K
156 sales in 3 years
Median age
44.4
21% are 65+ · Mid Glamorgan 20%
Degree level
27%
of residents 16+ · Wales 31%
Walk, cycle, bus
10%
of commuters · Wales 16%
TownGrade
D
#16 of 32 in Mid Glamorgan
Is Treharris a good place to live?
A town with more to fix than most. It takes 3.3 years of household income in the Merthyr Tydfil council area to buy the median home, at £136,000. Overall, Treharris earns a D, better than 14% of UK towns. In the ranking it comes #16 of 32 in Mid Glamorgan. Health is a weak point: 8.3% in bad or very bad health, 23% disabled.
Figures: health, Census 2021 (the grade adjusts for age) · prices, HM Land Registry, the last three years · incomes, ONS.
This town's Health Grade uses ONS's small-area life expectancy and healthy life expectancy for 2019 to 2023, and two Census 2021 measures, bad health and disability, adjusted for age. English towns' grades also use OHID's small-area early deaths, hospital admissions and child obesity, which OHID publishes for England only.
What makes Treharris stand out
The 2 things Treharris does most differently from other towns.
How Treharris grades
Each subject compared with the 2,160 UK towns with an overall grade (schools within Wales), ordered by how far Treharris is from typical. American towns are graded separately.
HealthHealth outcomes are among the weakest comparedDOpen →Jobs & incomeNear the bottom of the towns comparedC−Open →Walkability10% of commuters walk, cycle or take public transportCOpen →Hazard risk0.8% of homes at high or medium risk of flooding from rivers or the seaC+Open →SafetyBased on crimes reported per residentC+Open →Cost of livingAbout average among the towns comparedB−Open →
SchoolsNot published in Wales–
Character Graded, but not part of the overall grade.
History2 listed buildingsCOpen →Outdoors72% live within 400 m of a park; 2.6 ha of public green space per 1,000 residentsCOpen →Civic life1.6 local charities per 1,000 residents; 88% live within 1 km of a libraryB+Open →
How TownRatings grades towns →
The data
Data highlights are ordered by what stands out in Treharris.
Health
People in Treharris live shorter lives than in 88% of UK towns
One GP practice serves the town. The nearest A&E to Treharris is Prince Charles Hospital, 7.7 miles away. 77% of Treharris’ residents described their health as good or very good at the census, near Mid Glamorgan’s towns (77%) and lower than Wales’s towns (78%).
77%good or very good healthDHealth Grade
General health, self-reported
Good or very good 77%Fair 15%Bad or very bad 8%
| Census 2021 | Treharris | Mid Glamorgan | Wales |
|---|---|---|---|
| Good or very good health | 77% | 77% | 78% |
| Bad or very bad health | 8.3% | 8.2% | 7.1% |
| Disabled (Equality Act) | 23% | 23% | 22% |
77
life expectancy at birth, men (2019–23)
80.8
life expectancy at birth, women
Welsh towns’ Health Grades use ONS’s small-area life expectancy and healthy life expectancy for 2019 to 2023, and two Census 2021 measures, bad health and disability, adjusted for age. English towns’ also use OHID’s small-area early deaths, hospital admissions and child obesity, which OHID publishes for England only.
ONS Census 2021, general health and disability · ONS, life expectancy 2019–23 · OGL · A young population flatters these answers, which are not age-adjusted; the Health Grade instead uses measures that allow for age, such as life expectancy.
Schools
1 state school in Treharris
It is listed below. Its one primary school teaches 335 pupils.
| School | Level | Pupils | Letter |
|---|---|---|---|
| Edwardsville Primary SchoolLargest primary schoolPrimary | Primary | 335 | – |
Welsh Government · schools list · Wales publishes no school-level results, so its schools have no letters.The Schools page →
Work & commuteJobs & income grade C−
Long commutes are the norm in Treharris: just 16% travel under 5 km, below Mid Glamorgan’s towns and Wales’s towns
The Census was taken on 21 March 2021, in lockdown, so 24% of workers were mainly at home; shares here are of those who travelled.
At the census, 88% of commuters went by car. 2.5% of 16 to 64s claimed unemployment benefits in 2026, lower than both Mid Glamorgan’s towns (3.2%) and Wales’s towns (3%). Household income averages £44K a year before tax.
10%walk, cycle or ride
How commuters got to work · March 2021
Driving88%
On foot5%
Bus3%
Train2%
16%
of commuters travel under 5 km · Wales 41%
24%
worked mainly from home in March 2021
£44K
mean household income, before tax
2.5%
of 16 to 64s claim unemployment benefits (2026)
C
Walkability: more walkable than 26% of UK towns
ONS Census 2021, method of travel and distance to work · ONS small-area income · DWP claimant count · OGL
History
More of the land in Treharris is conservation area than in Mid Glamorgan’s towns or Wales’s towns: 12%
The heritage lists give each building’s grade but not its age, so we don’t say which is oldest.
47% of its homes were built before 1919, close to Mid Glamorgan’s towns (47%) and above Wales’s towns (27%). None of the 2 listed buildings reaches Grade II* or Grade I; all are Grade II.
2listed buildingsCHistory Grade
Listed buildings by grade · Cadw
Grade I0
Grade II*0
Grade II2
0
scheduled monuments
0
registered parks and gardens
47%
of homes built before 1919 · typical UK town 15%
4
listed buildings per 10,000 residents · typical UK town 24
Cadw list, October 2026 · Valuation Office Agency, homes by build period · OGL
Safety
Violence is recorded less often in Treharris than in Mid Glamorgan’s towns or across Wales’s towns: 24.7 per 1,000 residents a year
Violence and sexual offences made up 43% of the total. Treharris logged 229 reported offences in a year (to August 2026), plus 49 complaints of anti-social conduct. Homes saw 11.6 burglaries and acts of damage per 1,000 residents a year, above Mid Glamorgan’s towns (10.3) and Wales’s towns (10.7) alike.
24.7violent and sexual offences per 1,000 a yearC+Safety Grade
Compared with UK towns its sizeLess crime per resident than 42% of the 1,308 UK towns of 2,500 to 10,000 people: about the middle for its size. Context only, not part of the grade.
Reports by type · Sep 2025 to Aug 2026
Violence & sexual99
Public order30
Damage & arson28
Vehicle crime28
Other theft13
Other crime11
Shoplifting8
Burglary8
Anti-social49
Not gradedAnti-social behaviour, shoplifting and other theft are shown but left out of the Safety Grade, which counts violence and crimes against homes and vehicles per resident.
24.7
violent and sexual offences per 1,000 residents a year, averaged Sep 2023 to Aug 2026
11.6
burglary, vehicle crime and damage per 1,000 a year, averaged Sep 2023 to Aug 2026
9.3
anti-social behaviour reports per 1,000 (not graded)
229
crimes recorded in the 12 months to August 2026
data.police.uk street-level crime · points inside the ONS built-up-area boundary · OGL · The police category of violence and sexual offences includes harassment and stalking.
HousingCost of living grade B−
Most households in Treharris own their home: 76%, more than in both Mid Glamorgan’s towns and Wales’s towns
Social housing holds 9% of households, lower than both Mid Glamorgan’s towns (15%) and Wales’s towns (18%). Private rents average £754 a month across the Merthyr Tydfil council area. Behind the median of £136,000: 156 standard sales inside Treharris’s built-up area, September 2023 to August 2026.
£136Kmedian sale
Median sale price · Sep 2023 to Aug 2026
Treharris£136K
Typical UK town£277K
| By type | Median | Sales |
|---|---|---|
| Detached | £305,000 | 27 |
| Semi-detached | £200,000 | 31 |
| Terraced | £120,000 | 98 |
76%
of households own their home · Wales 65%
15%
rent privately · Wales 17%
£754
average private rent a month, Merthyr Tydfil council area
£2,594
council tax, Band D, 2026–27
HM Land Registry Price Paid · ONS private rents · MHCLG / Welsh Government council tax · ONS Census 2021 tenure · OGL
Who lives here
Fewer children live in Treharris than in Mid Glamorgan’s towns or Wales’s towns: 15% are under 15
People aged 15 to 24 make up just over a tenth of the town. The median resident of Treharris is 44.4 years old. 27% of adults hold a degree, about level with Mid Glamorgan’s towns (28%) and below Wales’s towns (31%).
44.4median age
TreharrisMid GlamorganWales
Ages · share of residents
21%
Qualifications · residents 16 and older
No qualifications23%
Apprenticeship6%
A levels or similar18%
Degree level27%
Women and men · all residents
51% women, 49% men
About 95 men for every 100 women. Across Wales, 51% of residents are women.
| Treharris | Mid Glamorgan | Wales | |
|---|---|---|---|
| Under 15 | 15% | 17% | 17% |
| 15–24 | 11% | 11% | 12% |
| 25–44 | 25% | 25% | 25% |
| 45–64 | 29% | 27% | 26% |
| 65+ | 21% | 20% | 21% |
| No qualifications | 23% | 24% | 20% |
| Apprenticeship | 5.9% | 5.3% | 5.6% |
| A levels or similar | 18% | 16% | 17% |
| Degree level | 27% | 28% | 31% |
ONS Census 2021 · Mid Glamorgan and Wales: all residents of their built-up areas · OGL
Keep exploring
Everything we know about Treharris
15pages on Treharris
The big questions
SafetyC+24.7 violent and sexual offences per 1,000 residents a year, averaged Sep 2023 to Aug 2026Cost of livingB−Median home £136K · rent £754 a monthHousing39 sold in 12 months · busiest street Ty Llwyd ParcSchools1 state school (no results published in Wales)HealthDWork & commuteC−42% of working residents work in the townFlood & hazardsC+0.8% of homes at high or medium flood risk
Out and about
Famous people from Treharris
5 notable people were born in Treharris.
Treharris’s neighbours
The nearest built-up areas, from ONS’s 2022 boundaries. See them on the map →
TrelewisNelsonAbercynonGelligaerAberfanBedlinogPen-pedair-heolTreharris
How the neighbours grade
| Town | People | Miles | Overall | Cost | Safety | Health |
|---|---|---|---|---|---|---|
| Treharris | 5,042 | — | D | B− | C+ | D |
| Trelewis | 2,022 | 0.6 | — | B− | C | D |
| Nelson | 4,235 | 1.3 | C | B+ | C | D |
| Abercynon | 6,376 | 1.4 | D | B+ | C− | D− |
| Gelligaer | 1,436 | 2.2 | — | A | D− | D− |
| Aberfan | 2,431 | 2.6 | — | B− | C− | D− |
| Bedlinog | 1,098 | 2.8 | — | B− | C− | D− |
| Pen-pedair-heol | 3,787 | 2.8 | C+ | B+ | B+ | D |
Trelewis, Gelligaer, Aberfan and Bedlinog have fewer than 2,500 residents, so they get subject grades but no overall grade. People: Census 2021. Miles: centre to centre.
Questions about Treharris
How many listed buildings are there in Treharris?
2 on Cadw’s list.
Is Treharris expensive to live in?
Homes cost less than in most UK towns: the median sale over three years was £136,000, against £277,000 in the typical UK town. By type: terraced houses £120,000, semi-detached houses £200,000 and detached houses £305,000.
Is Treharris safe?
About the middle for its size: 58% of the 1,308 UK towns of 2,500 to 10,000 people report less crime per resident. Against all UK towns, it grades C+.
About Treharris
Town in Mid Glamorgan, Wales
Treharris is a built-up area of 5,042 people, in the Merthyr Tydfil council area. TownRatings uses ONS’s 2022 built-up areas as towns: the physical town, as people mean the word, rather than a council district, so its figures cover the town itself.
Built from ONS geography and Census 2021
- Population
- 5,042 (Census 2021)
- Council
- Merthyr Tydfil
- County
- Mid Glamorgan
- Region
- Wales
- Area
- 0.5 sq mi (1.2 km²)
- ONS code
- W45000484
Sources: ONS Census 2021, output areas summed to the ONS 2022 built-up area · HM Land Registry Price Paid (standard sales, September 2023 to August 2026) · ONS Price Index of Private Rents (August 2026, by council) · MHCLG and Welsh Government council tax, Band D 2026–27 (with parish precepts in England) · data.police.uk street-level crime, 36 months to August 2026, points inside the built-up-area boundary · ONS small-area life expectancy and healthy life expectancy, 2019 to 2023 (England and Wales), OHID Fingertips small-area indicators (England) and Census 2021 health, adjusted for age · ONS small-area income estimates (financial year ending 2023) · DWP claimant count via Nomis (January to August 2026) · Cadw listed buildings, scheduled monuments and registered historic parks and gardens via DataMapWales, October 2026, inside the ONS 2022 built-up-area boundary · Valuation Office Agency, Council Tax: stock of properties by build period (31 March 2025) · TownRatings grades: our own summary of the data, ranked against UK towns only. All under the Open Government Licence v3.0.
Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2026. Contains OS data © Crown copyright and database right 2026 (ONS boundaries). Northern Ireland: Source: NISRA; contains Land & Property Services data and Ordnance Survey of Northern Ireland information, © Crown copyright, licensed under the Open Government Licence v3.0. Scotland: contains National Records of Scotland data, Registers of Scotland data and SEPA data, © Crown copyright / © SEPA 2025, licensed under the Open Government Licence v3.0.