Parish Church of St. Mary · Photo: Richard Hoare · CC BY-SA 2.0Trefriw ranks above 99% of UK towns on residents who describe themselves as White British: 98%
Set against 38% across Wales’s towns, 43% of adults have never married or formed a civil partnership in Trefriw. 360 residents in 154 households: that is Trefriw at the 2021 Census. Locally, 17% of residents are 65 or over. Few places have so few households in terraced houses: 13% here, fewer than in 80% of UK towns.
Half of Trefriw is under 41.6, younger than 71% of UK towns
Share of residents in each five-year age band, Census 2021.
Residents aged 15 to 24 are about as common here as across Wales’s towns: 12%. In Penrhyn Bay, the oldest of Clwyd’s towns by this measure, it is 34%.
Broad ages · share of residents
Women and men · all residents
53% women, 47% men
About 90 men for every 100 women. Across Wales, 51% of residents are women.
A larger share of full-time students than 95% of UK towns: 8.6%
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%.
Residents who moved in within the year: 9.9%, near enough the figure across Wales’s towns. The share of full-time students across Wales’s towns is 8%.
The Census was taken on 21 March 2021, in term time, so students were counted at their term addresses.
Households with dependent children: 30%, a higher share than 73% 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.
Where nearly a third of households are one person living alone across Wales’s towns, Trefriw has 27%. 4.6% of households are unrelated adults sharing a home.
Below 72% of UK towns: 12% of households have no car or van
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
15% of households live in a flat or apartment, against 14% across Wales’s towns. In one household in 9 there is no car or van. At 32%, the share of households in detached houses is higher than in 58% of UK towns.
1.7% of residents were born outside the UK, fewer than in 99% 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%
Main language · residents aged 3 and over
Most residents from abroad were born in EU countries (1.1%) or in the Middle East and Asia (0.6%). Residents born outside the UK: 7.4% across Wales’s towns, for comparison. Across Wales’s towns, the share of residents whose main language is English is 96%; Trefriw has 100%.
50% of residents speak Welsh in Trefriw
Welsh language skills, residents aged 3 and over, Census 2021.
Welsh language skills · residents aged 3 and over
174 residents, 50% of those aged 3 and over, said they can speak Welsh at the 2021 Census, against 16% across Welsh towns: more than in 92% of Welsh towns. Top of Clwyd: Llanfairfechan, at 44%.
Trefriw ranks above 98% of UK towns on residents with no religion: 57%
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: 98% of Trefriw · Clwyd’s towns 92% · Wales’s towns 90%.
Religion · all residents
Here 40% of residents describe themselves as Christian, where the figure across Wales’s towns is 43%. The usual figure: 47% of residents said they have no religion across Wales’s towns.
Trefriw ranks below 95% of UK towns on married adults and civil partners: 38%
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
Students and young renters account for much of that. Here, nearly one in ten residents give unpaid care. 43% of Trefriw’s adults have never married or formed a civil partnership and 38% are married, against 38% and 43% across Wales’s towns.
Adults qualified to degree level or above: 37%
Highest qualification, residents 16 and over, Census 2021.
Highest qualification · residents 16 and over
Across Wales’s towns, 31% of adults have a degree-level qualification; in Trefriw, 37%, and 14% have none, against 20%. 13% have A levels as their highest qualification, many of them still studying for a degree.
A younger town than 6 of the 7 around it: Trefriw
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 |
|---|---|---|---|---|---|
| Trefriw | 360 | — | 41.6 | 17% | 30% |
| Llanrwst | 2,463 | 1.5 mi | 46.3 | 25% | 25% |
| Llansanffraid Glan Conwy | 1,663 | 8 mi | 51.9 | 29% | 20% |
| Penmaenmawr | 2,762 | 9.1 mi | 46.6 | 23% | 24% |
| Dwygyfylchi | 1,403 | 9.2 mi | 50.6 | 26% | 23% |
| Llanfairfechan | 3,547 | 9.4 mi | 49.2 | 24% | 24% |
| Conwy | 15,706 | 9.5 mi | 48.7 | 27% | 24% |
| Bethesda | 3,757 | 9.8 mi | 39.8 | 17% | 29% |
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 Trefriw’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 Trefriw’s residents
What is the population of Trefriw?
The 2021 Census counted 360 people in Trefriw’s built-up area.
What is the average age in Trefriw?
The median age was 41.6 at the 2021 Census. 12% of residents were 15 to 24 and 17% were 65 or over.
How diverse is Trefriw?
98% of residents described themselves as White British in 2021, against 90% across Wales’s towns and 92% across Clwyd’s towns. 1.7% were born outside the UK.
What religion are people in Trefriw?
57% said they had no religion and 40% that they were Christian at the 2021 Census; 0% were Muslim and 3.6% didn’t answer.
Is Trefriw good for families?
30% of households had dependent children in 2021, against 27% across Wales’s towns. Schools are on Trefriw’s schools page.
How many people speak Welsh in Trefriw?
174 residents aged 3 and over, 50%, 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.