Photo: DS Pugh · CC BY-SA 2.098% of residents describe themselves as White British, a share 99% of UK towns don’t reach
In Groeslon, 2.2% of households live in a flat or apartment, beside 14% across Wales’s towns. There were 357 households locally at the 2021 Census, home to 826 residents. For Groeslon, the census puts shared households of unrelated adults at 0.8%. One in ten households have no car or van, a lower share than in 84% of UK towns.
25% of residents are 65 or over, more than in 73% of UK towns
Share of residents in each five-year age band, Census 2021.
9.6% of residents are aged 15 to 24, against 12% across Wales’s towns. As a reference point, 21% of residents are 65 or over across Wales’s towns. More residents are 45–49 than any other five-year age: 7.4% of residents. The median age in Groeslon is 46.2, higher than in 63% of UK towns.
Broad ages · share of residents
Women and men · all residents
51% women, 49% men
About 95 men for every 100 women. Across Wales, 51% of residents are women.
A smaller share of residents who moved in within the year than 99% of UK towns: 4.9%
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 Groeslon, 5.3% of adults are full-time students, beside 8% across Wales’s towns. Against that, 9.1% of residents lived at another address a year earlier across Wales’s towns.
The Census was taken on 21 March 2021, in term time, so students were counted at their term addresses.
One-person households: 28%, a lower share than 66% 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.
Across Wales’s towns, 27% of households have dependent children; in Groeslon, 28%. The share of one-person households across Wales’s towns is 32%.
Households in detached houses: 37%, a higher share than 70% of UK towns
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
By its share of households in terraced houses (27%), Groeslon is above 74% of UK towns. On average, 24% of households live in a detached house across Wales’s towns.
Below 99% of UK towns: 1.7% of residents were born outside the UK
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
Residents born abroad were most often born in EU countries (0.6%), then in the Americas, Oceania and elsewhere (0.5%). On average, 7.4% of residents were born outside the UK across Wales’s towns. The figure for residents whose main language is English is 100% in Groeslon and 96% across Wales’s towns.
Welsh in Groeslon: 79% of residents speak it
Welsh language skills, residents aged 3 and over, Census 2021.
Welsh language skills · residents aged 3 and over
632 residents, 79% of those aged 3 and over, said they can speak Welsh at the 2021 Census, against 16% across Welsh towns: more than in 99% of Welsh towns. Top of Gwynedd: Caernarfon, at 82%.
45% of residents said they have no religion, a share 76% of UK towns don’t reach
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 Groeslon · Gwynedd’s towns 93% · Wales’s towns 90%.
Religion · all residents
Christians make up 48% of residents, against 43% across Wales’s towns. As a yardstick, 47% of residents said they have no religion across Wales’s towns.
Groeslon ranks below 80% of UK towns on unpaid carers: 8.2%
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
38% of adults have never married or formed a civil partnership across Wales’s towns, against 37% in Groeslon. The comparison figure for unpaid carers is 10% across Wales’s towns. Here, 46% of adults are married or in a civil partnership.
The share of adults with a degree-level qualification: 35%
Highest qualification, residents 16 and over, Census 2021.
Highest qualification · residents 16 and over
Degree-level qualifications are held by 35% of adults in Groeslon (Wales’s towns: 31%), and no qualification by 17% (Wales’s towns: 20%).
No nearby town is as old as Groeslon
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 |
|---|---|---|---|---|---|
| Groeslon | 826 | — | 46.2 | 25% | 28% |
| Penygroes | 1,793 | 1.6 mi | 45.2 | 24% | 24% |
| Caernarfon | 9,831 | 4.4 mi | 39.6 | 19% | 28% |
| Llanrug | 1,537 | 6.1 mi | 41.2 | 22% | 34% |
| Bethel | 1,091 | 6.8 mi | 44.7 | 24% | 32% |
| Llanberis | 1,838 | 6.9 mi | 44.5 | 20% | 25% |
| Clwt-y-bont | 1,385 | 7.8 mi | 39 | 17% | 31% |
| Y Felinheli | 2,333 | 7.9 mi | 42.9 | 21% | 25% |
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.
- “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 Groeslon’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 Groeslon’s residents
What is the population of Groeslon?
The 2021 Census counted 826 people in Groeslon’s built-up area.
What is the average age in Groeslon?
The median age was 46.2 at the 2021 Census. 9.6% of residents were 15 to 24 and 25% were 65 or over.
How diverse is Groeslon?
98% of residents described themselves as White British in 2021, against 90% across Wales’s towns and 93% across Gwynedd’s towns. 1.7% were born outside the UK.
What religion are people in Groeslon?
45% said they had no religion and 48% that they were Christian at the 2021 Census; 0% were Muslim and 6.4% didn’t answer.
Is Groeslon good for families?
28% of households had dependent children in 2021, against 27% across Wales’s towns. Schools are on Groeslon’s schools page.
How many people speak Welsh in Groeslon?
632 residents aged 3 and over, 79%, 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.