Photo: Roger Cornfoot · CC BY-SA 2.0A Welsh-speaking town: 21% of St Asaph’s residents speak Welsh
Where nearly a quarter of households live in a detached house across Wales’s towns, St Asaph has 47%. The 2021 Census put the town’s population at 3,483, in 1,574 households. On the census count, 26% of residents are 65 or over. Households with dependent children are rarer here than in 78% of UK towns.
What the Census says about St Asaph’s people
A Welsh-speaking town
709 residents, 21% of those aged 3 and over, said they can speak Welsh in 2021, more than in 76% of Welsh towns. Welsh language ↓
Written from the data on this page: ONS Census 2021 (output areas summed to the 2022 built-up area) and ONS mid-year population estimates.
St Asaph grew +8% from 2011 to 2024, ahead of 50% of UK towns
ONS mid-year estimates, each year indexed to mid-2011 = 100. St Asaph’s figure is the small areas (2021 LSOAs) that make up the town.
People, mid-2011 = 100
Change by age, 2011 to 2024
About 3,400 people in 2011; 3,600 in 2024.
Change by age ran from +24% for the 65 and over to −6% for the 16 to 29. The biggest jump came in the year to mid-2017: 100 more people.
St Asaph is older than 78% of UK towns: a median age of 48.7
Share of residents in each five-year age band, Census 2021.
Across Wales’s towns, the share of residents aged 15 to 24 is 12%; St Asaph has 10%. No age band is larger than 70–74: 7.7% of residents, 1.4 times the share across Wales’s towns.
Median age of UK towns of 2,500+
■ St Asaph, 48.7. The typical town is 44.4.
Broad ages · share of residents
Women and men · all residents
52% women, 48% men
About 92 men for every 100 women. Across Wales, 51% of residents are women. Women live longer than men, so towns with many older residents have more women.
Fewer residents who moved in within the year than 88% of UK towns: 6.8%
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%.
In St Asaph, 35% of adults work in managerial and professional jobs and 23% in routine and semi-routine work, against 29% and 27% across Wales’s towns. Against that, 9.1% of residents lived at another address a year earlier across Wales’s towns. On the census count, 5% of adults are full-time students.
The Census was taken on 21 March 2021, in term time, so students were counted at their term addresses.
St Asaph households average 2.2 people, smaller than in 79% of UK towns
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.
On shared households of unrelated adults, 3.2% here is much the same as across Wales’s towns. A third of households are one person living alone.
Only 17% of households live in a terraced house in St Asaph
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
For St Asaph, the census puts households without a car or van at 15%. Few places have as many households in flats: 11% here, more than in 50% of UK towns.
A lower share of residents born outside the UK than 69% of UK towns, at 4.6%
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
By birthplace, the largest groups from abroad were born in the Middle East and Asia (1.8%) and in EU countries (1.6%). As a reference point, 7.4% of residents were born outside the UK across Wales’s towns. Residents whose main language is English are more common here than in nearly two thirds of UK towns. 14% of those born abroad arrived in 2017 or later, against 23% across Wales’s towns.
A Welsh-speaking share of 21% in St Asaph
Welsh language skills, residents aged 3 and over, Census 2021.
Welsh language skills · residents aged 3 and over
Across Welsh towns, 16% of residents can speak Welsh; here 709 people, 21% of those aged 3 and over, said they can: more than in 76% of Welsh towns. In Clwyd, Llanfairfechan has the highest share (44%).
St Asaph ranks above 80% of UK towns on residents who describe themselves as Christian: 55%
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: 95% of St Asaph · Clwyd’s towns 92% · Wales’s towns 90%.
Religion · all residents
Compared with 47% across Wales’s towns, 37% of residents said they have no religion here. On the census count, 95% of residents describe themselves as White British. Set beside that, 43% of residents describe themselves as Christian across Wales’s towns.
More unpaid carers than 93% of UK towns: 12%
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
By its share of adults who have never married (33%), St Asaph is above 54% of UK towns. On average, 10% of residents give unpaid care across Wales’s towns. Married adults and civil partners: 46% of the total.
Degree-level qualifications reach 33% of adults
Highest qualification, residents 16 and over, Census 2021.
Highest qualification · residents 16 and over
St Asaph’s adults: 33% with a degree-level qualification and 20% with none, against 31% and 20% across Wales’s towns.
255th highest median age among 749 UK towns of 2,500 to 5,000
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 Milford on Sea (64.6), the oldest. Nearest to St Asaph in age: Bramhope (48.7), Tollesbury (48.7), Boroughbridge (48.8) and Kirkheaton (48.8).
St Asaph is younger than 3 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 |
|---|---|---|---|---|---|
| St Asaph | 3,483 | — | 48.7 | 26% | 24% |
| Rhuddlan | 3,791 | 2.5 mi | 50.8 | 29% | 21% |
| Bodelwyddan | 1,785 | 2.6 mi | 42.2 | 20% | 30% |
| Dyserth | 2,038 | 3.1 mi | 48.9 | 24% | 25% |
| Rhyl | 26,982 | 4.3 mi | 41.8 | 21% | 28% |
| Meliden | 2,002 | 4.3 mi | 46.3 | 24% | 27% |
| Kinmel Bay | 9,016 | 4.4 mi | 50.3 | 28% | 25% |
| Denbigh | 8,072 | 5.2 mi | 43.5 | 21% | 27% |
Health, work and homes have their own pages
What this data can and can’t tell you
- The Census was taken in a lockdown, in term time. 21 March 2021 fell in term time, and students were asked to give their term-time address, so most were counted where they study. Some may have been living with family that day.
- “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 St Asaph’s figures, so households in open countryside are left out. The population trend compares with the whole county and nation.
- Estimates since 2021 are modelled. The ONS builds mid-year estimates from the Census, births, deaths and migration records. St Asaph’s trend uses the small areas (2021 LSOAs) with most of their people inside it: 3,483 people in 2021, against 3,483 in the built-up area.
- 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 St Asaph’s residents
What is the population of St Asaph?
The 2021 Census counted 3,483 people in St Asaph’s built-up area. The ONS estimates the same small areas held 3,600 people in mid-2024, 8% more than in 2011.
What is the average age in St Asaph?
The median age was 48.7 at the 2021 Census, older than 78% of UK towns. 10% of residents were 15 to 24 and 26% were 65 or over.
How diverse is St Asaph?
95% of residents described themselves as White British in 2021, against 90% across Wales’s towns and 92% across Clwyd’s towns. 4.6% were born outside the UK.
What religion are people in St Asaph?
37% said they had no religion and 55% that they were Christian at the 2021 Census; 1.2% were Muslim and 5.7% didn’t answer.
Is St Asaph good for families?
24% of households had dependent children in 2021, against 27% across Wales’s towns. Schools are on St Asaph’s schools page.
How many people speak Welsh in St Asaph?
709 residents aged 3 and over, 21%, 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) · ONS mid-year population estimates for 2021 LSOAs, mid-2011 to mid-2024. 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.