Photo: Eric Jones · CC BY-SA 2.0A lower share of households in flats than 99% of UK towns, at 0.4%
Just over one in ten residents are aged 15 to 24 across Wales’s towns, against 6.1% in Pentraeth. The village is home to 525 residents in 230 households, by the 2021 Census. The share of residents with no religion stands at 44%. Fewer adults who have never married than in 66% of UK towns: 30%.
Older than 84% of UK towns: half of Pentraeth is over 49.8
Share of residents in each five-year age band, Census 2021.
27% of residents are 65 or over, against 21% across Wales’s towns. More residents are 55–59 than any other five-year age: 9% of residents, 1.3 times the share across Wales’s towns.
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. Women live longer than men, so towns with many older residents have more women.
Below 99% of UK towns: 2.8% of adults are full-time students
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%.
Across Wales’s towns, the share of residents who moved in within the year is 9.1%; Pentraeth has 7.9%. By way of comparison, 8% of adults are full-time students across Wales’s towns.
2.2 people per household, fewer than in 83% of UK towns
Household make-up at the 2021 Census. Each square is 1% of households.
Against Gwynedd’s towns and Wales’s towns
People per household
Wales’s towns.
One-person households make up 31%, against 32% across Wales’s towns. At 28%, the share of households with dependent children is higher than in 60% of UK towns. Shared households of unrelated adults: 2.6% of the total.
A smaller share of households without a car or van than 60% of UK towns: 14%
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
29% of households live in a terraced house across Wales’s towns, against 28% in Pentraeth. At the same time, households in detached houses are rarer here than in 51% of UK towns. As a reference point, just over a fifth of households have no car or van across Wales’s towns.
Above 88% of UK towns: 99% of residents have English as their main language
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
The largest groups were born in EU countries (1.7%) and in the Middle East and Asia (1.7%). The usual figure: 96% of residents have English as their main language across Wales’s towns. 4.6% of residents were born outside the UK, a lower share than in 69% of UK towns.
Speaking Welsh: 58% in Pentraeth
Welsh language skills, residents aged 3 and over, Census 2021.
Welsh language skills · residents aged 3 and over
297 residents, 58% of those aged 3 and over, said they can speak Welsh at the 2021 Census, against 16% across Welsh towns: more than in 94% of Welsh towns. Top of Gwynedd: Caernarfon, at 82%.
95% of residents describe themselves as White British, more than in 73% of UK towns
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 Pentraeth · Gwynedd’s towns 93% · Wales’s towns 90%.
Religion · all residents
Christians make up 45% of residents, against 43% across Wales’s towns. The next-largest groups, after White British, are Other White (2.5%), Mixed or multiple (1%) and Arab (0.8%). Across Wales’s towns, the share of residents who describe themselves as White British is 90%.
45% of adults are married or in a civil partnership, fewer than in 70% of UK towns
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
Little separates the share of unpaid carers here, 10%, from the figure across Wales’s towns. Set beside that, 43% of adults are married or in a civil partnership across Wales’s towns. Unpaid carers giving 50 hours or more a week: 21.
33% of adults have qualifications at degree level
Highest qualification, residents 16 and over, Census 2021.
Highest qualification · residents 16 and over
33% of Pentraeth’s adults have a degree-level qualification, against 31% across Wales’s towns; 17% have none (20%).
Pentraeth 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 |
|---|---|---|---|---|---|
| Pentraeth | 525 | — | 49.8 | 27% | 28% |
| Benllech | 2,072 | 2.7 mi | 62 | 45% | 13% |
| Llanfair Pwllgwyngyll | 2,905 | 4 mi | 52 | 33% | 22% |
| Llangefni | 5,264 | 4.1 mi | 39.5 | 20% | 31% |
| Menai Bridge | 3,045 | 4.2 mi | 47.3 | 24% | 20% |
| Gaerwen | 1,277 | 4.8 mi | 39.8 | 19% | 30% |
| Beaumaris | 1,120 | 5.2 mi | 58.1 | 39% | 17% |
| Bangor | 16,994 | 5.4 mi | 26.4 | 12% | 26% |
Health, work and homes have their own pages
What this data can and can’t tell you
- “Gwynedd’s towns” and “Wales’s towns” mean their built-up areas. Census comparisons pool every built-up area in Gwynedd (or Wales), summed the same way as Pentraeth’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 Pentraeth’s residents
What is the population of Pentraeth?
The 2021 Census counted 525 people in Pentraeth’s built-up area.
What is the average age in Pentraeth?
The median age was 49.8 at the 2021 Census. 6.1% of residents were 15 to 24 and 27% were 65 or over.
How diverse is Pentraeth?
95% of residents described themselves as White British in 2021, against 90% across Wales’s towns and 93% across Gwynedd’s towns. 4.6% were born outside the UK.
What religion are people in Pentraeth?
44% said they had no religion and 45% that they were Christian at the 2021 Census; 0.4% were Muslim and 10% didn’t answer.
Is Pentraeth good for families?
28% of households had dependent children in 2021, against 27% across Wales’s towns. Schools are on Pentraeth’s schools page.
How many people speak Welsh in Pentraeth?
297 residents aged 3 and over, 58%, 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.