Photo: Rept0n1x · CC BY-SA 3.0A smaller share of households in flats than 99% of UK towns: 0.8%
Across Wales’s towns, 29% of households live in a terraced house; in Mynydd Isa, 3.4%. Half of the town’s residents are over 50, older than in 84% of UK towns. At the 2021 Census, 4,738 people lived here, in 2,073 households. Adults who have never married: 26% of the total.
What the Census says about Mynydd Isa’s people
Many older residents
29% of residents were 65 or over in 2021, more than in 88% of UK towns; 18% of households are someone 66 or over living alone. Ages ↓
Written from the data on this page: ONS Census 2021 (output areas summed to the 2022 built-up area).
Mynydd Isa ranks above 88% of UK towns on residents aged 65 and over: 29%
Share of residents in each five-year age band, Census 2021.
The biggest five-year age group is 70–74, with nearly one in ten residents, 1.5 times the share across Wales’s towns. The wider picture: 21% of residents are 65 or over across Wales’s towns. Locally, 9.9% of residents are aged 15 to 24.
Median age of UK towns of 2,500+
■ Mynydd Isa, 50. The typical town is 44.4.
Broad ages · share of residents
Women and men · all residents
51% women, 49% men
About an even split. Across Wales, 51% of residents are women.
Mynydd Isa sits below 61% of UK towns for full-time students (4.6%)
What adults did at the 2021 Census (the ONS’s NS-SEC classes), and where residents lived a year earlier.
Adults by occupation class · residents 16 and over
Address a year before the Census
Residents who lived somewhere else a year earlier. The bar runs to 25%.
By class, 37% of adults are in managerial and professional jobs and 22% in routine and semi-routine work (Wales’s towns: 29% and 27%). Typically, 8% of adults are full-time students across Wales’s towns. Across Mynydd Isa, nearly one in ten residents lived at another address a year earlier.
Only 27% of households are one person living alone in Mynydd Isa
Household make-up at the 2021 Census. Each square is 1% of households.
Against Clwyd’s towns and Wales’s towns
People per household
Wales’s towns.
With households with dependent children at 25%, Mynydd Isa is behind 76% of UK towns on that count. The comparison figure for one-person households is 32% across Wales’s towns. The census found that 1.9% of households are unrelated adults sharing a home here.
More households in detached houses than 94% of UK towns: 57%
Accommodation type and cars or vans per household, Census 2021. Owning and renting are on Cost of living.
Type of home
Cars or vans · share of households
The share of households without a car or van is 8.3%, against 21% across Wales’s towns. By way of comparison, nearly a quarter of households live in a detached house across Wales’s towns.
3.5% of residents were born outside the UK, fewer than in 84% of UK towns
Country of birth, year of arrival and main language, Census 2021.
Born outside the UK, by region · share of all residents; the bar runs to 10%
When those born abroad arrived
Main language · residents aged 3 and over
Of residents born abroad, 9.5% arrived in 2017 or later, against 23% across Wales’s towns. The census found that 99% of residents have English as their main language in Mynydd Isa. To put it in context, 7.4% of residents were born outside the UK across Wales’s towns.
In Mynydd Isa, 13% of residents can speak Welsh
Welsh language skills, residents aged 3 and over, Census 2021.
Welsh language skills · residents aged 3 and over
13% of residents aged 3 and over, 602 people, said in 2021 that they can speak Welsh, more than in 59% of Welsh towns (Welsh towns: 16%). In Clwyd, Llanfairfechan has the highest share (44%).
Mynydd Isa ranks above 97% of UK towns on residents who describe themselves as White British: 97%
How residents described themselves at the 2021 Census. Lines join the lowest and highest of the three figures.
Ethnic groups other than White British · all residents
White British, not charted: 97% of Mynydd Isa · Clwyd’s towns 92% · Wales’s towns 90%.
Religion · all residents
37% of residents said they have no religion (Wales’s towns: 47%). The wider picture: nine in ten residents describe themselves as White British across Wales’s towns. Here, 56% of residents describe themselves as Christian.
55% of adults are married or in a civil partnership, a share 89% of UK towns don’t reach
Legal partnership status (residents 16 and over) and unpaid care (residents 5 and over), Census 2021.
Partnership status · residents 16 and over
Unpaid care given · share of residents 5 and over
Unpaid carers giving 50 hours or more a week: 136. Mynydd Isa has more unpaid carers than two thirds of UK towns, at 10%. The benchmark for married adults and civil partners across Wales’s towns: 43%.
32% of adults have qualifications at degree level
Highest qualification, residents 16 and over, Census 2021.
Highest qualification · residents 16 and over
Degree-level qualifications cover 32% of adults in Mynydd Isa, 31% across Wales’s towns; 14% have no qualification, against 20%.
160th oldest of 695 UK towns of 3,000 to 6,000 people
Median age, Census 2021. Hover a dot for its students and residents born abroad; click for its page.
At the ends of the range sit Bailrigg (18.9), the youngest, and Sutton on Sea and Trusthorpe (64.7), the oldest. Nearest to Mynydd Isa in age: Henfield (50), Callington (50), Bedale (50.1) and Tarporley (50.1).
Mynydd Isa is younger than 2 of its 7 nearest neighbours
Nearby built-up areas coloured by median age, Census 2021. Tap a town for its page.
| Town | People | Away | Median age | 65+ | Homes with children |
|---|---|---|---|---|---|
| Mynydd Isa | 4,738 | — | 50 | 29% | 25% |
| Mold | 9,890 | 1.3 mi | 45.1 | 23% | 27% |
| Buckley | 13,562 | 1.4 mi | 43.3 | 20% | 28% |
| Soughton | 1,697 | 1.5 mi | 51.7 | 28% | 23% |
| Northop Hall | 1,826 | 2.3 mi | 45.1 | 23% | 29% |
| Northop | 1,030 | 2.8 mi | 50.9 | 27% | 23% |
| Leeswood | 1,948 | 2.8 mi | 44.1 | 18% | 28% |
| Penyffordd | 3,822 | 3.1 mi | 40.9 | 19% | 33% |
Health, work and homes have their own pages
What this data can and can’t tell you
- “Clwyd’s towns” and “Wales’s towns” mean their built-up areas. Census comparisons pool every built-up area in Clwyd (or Wales), summed the same way as Mynydd Isa’s figures, so households in open countryside are left out.
- Small counts are blurred. The ONS adds small random changes to Census counts to protect privacy, so the same total differs a little between tables, and the shares of a small town can move by a point or two.
Questions about Mynydd Isa’s residents
What is the population of Mynydd Isa?
The 2021 Census counted 4,738 people in Mynydd Isa’s built-up area.
What is the average age in Mynydd Isa?
The median age was 50 at the 2021 Census, older than 84% of UK towns. 9.9% of residents were 15 to 24 and 29% were 65 or over.
How diverse is Mynydd Isa?
97% of residents described themselves as White British in 2021, against 90% across Wales’s towns and 92% across Clwyd’s towns. 3.5% were born outside the UK.
What religion are people in Mynydd Isa?
37% said they had no religion and 56% that they were Christian at the 2021 Census; 0.2% were Muslim and 6.1% didn’t answer.
Is Mynydd Isa good for families?
25% of households had dependent children in 2021, against 27% across Wales’s towns. Schools are on Mynydd Isa’s schools page.
How many people speak Welsh in Mynydd Isa?
602 residents aged 3 and over, 13%, said they can speak Welsh at the 2021 Census, against 16% across Welsh towns.
Sources: ONS Census 2021, output areas summed to the ONS 2022 built-up area (TS002, TS003, TS004, TS007A, TS008, TS015, TS017, TS019, TS021, TS029, TS030, TS039, TS044, TS045, TS062, TS067, TS032). 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.