Photo: Eric Jones · CC BY-SA 2.0Fewer flats than 99% of UK towns: 1.3% of households
The figure for residents aged 65 and over is 26% in Caergeiliog and 21% across Wales’s towns. At 7%, the share of unpaid carers is lower than in 96% of UK towns. The village had 378 residents in 162 households at the 2021 Census. Across Caergeiliog, 40% of households live in a detached house.
Caergeiliog is older than 75% of UK towns: a median age of 48.1
Share of residents in each five-year age band, Census 2021.
The biggest five-year age group is 65–69, with nearly one in ten residents, 1.6 times the share across Wales’s towns. Locally, nearly one in ten residents are aged 15 to 24.
Broad ages · share of residents
Women and men · all residents
53% women, 47% men
About 87 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.
6.2% of residents lived at another address a year earlier, below 95% of UK towns
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%.
Here 4.2% of adults are full-time students, where the figure across Wales’s towns is 8%. The wider picture: nearly one in ten residents lived at another address a year earlier across Wales’s towns.
Caergeiliog households average 2.3 people, larger than in 63% 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.
Where nearly a third of households are one person living alone across Wales’s towns, Caergeiliog has 30%. In Caergeiliog, 1.9% of households are unrelated adults sharing a home.
12% of households have no car or van, fewer than in 67% 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
Across Wales’s towns, the share of households in terraced houses is 29%; Caergeiliog has 30%. On average, 21% of households have no car or van across Wales’s towns.
Caergeiliog sits above 98% of UK towns for residents whose main language is English (99%)
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
3.7% of residents were born outside the UK; across Wales’s towns the figure is 7.4%. As a yardstick, 96% of residents have English as their main language across Wales’s towns. By birthplace, the largest groups from abroad were born in EU countries (1.9%) and in the Middle East and Asia (1.1%).
Welsh speakers make up 47% of Caergeiliog
Welsh language skills, residents aged 3 and over, Census 2021.
Welsh language skills · residents aged 3 and over
47% of residents aged 3 and over, 173 people, said in 2021 that they can speak Welsh, more than in 89% of Welsh towns (Welsh towns: 16%). Top of Gwynedd: Caernarfon, at 82%.
A higher White British share than 73% of UK towns: 95% of residents
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 Caergeiliog · Gwynedd’s towns 93% · Wales’s towns 90%.
Religion · all residents
Residents who describe themselves as Christian: 49% here and 43% across Wales’s towns. On residents with no religion, Caergeiliog sits higher than 84% of UK towns: 47%. As a yardstick, nine in ten residents describe themselves as White British across Wales’s towns. Other than White British, most residents describe themselves as Mixed or multiple (2.9%), African (0.8%) and Other White (0.5%).
Adults who have never married: 33%, a higher share than 53% 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
For 10 residents, unpaid care runs to 50 hours or more a week. Across Wales’s towns, the share of adults who have never married is 38%. In Caergeiliog, 48% of adults are married or in a civil partnership, beside 43% across Wales’s towns.
23% of adults have a degree-level qualification
Highest qualification, residents 16 and over, Census 2021.
Highest qualification · residents 16 and over
At degree level, Caergeiliog counts 23% of its adults, against 31% across Wales’s towns; at the other end, 21% have no qualification (20%).
Older than Caergeiliog: 2 of the 7 towns nearby
Nearby built-up areas coloured by median age, Census 2021. Tap a town for its page.
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 Caergeiliog’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 Caergeiliog’s residents
What is the population of Caergeiliog?
The 2021 Census counted 378 people in Caergeiliog’s built-up area.
What is the average age in Caergeiliog?
The median age was 48.1 at the 2021 Census. 9.5% of residents were 15 to 24 and 26% were 65 or over.
How diverse is Caergeiliog?
95% of residents described themselves as White British in 2021, against 90% across Wales’s towns and 93% across Gwynedd’s towns. 3.7% were born outside the UK.
What religion are people in Caergeiliog?
47% said they had no religion and 49% that they were Christian at the 2021 Census; 0% were Muslim and 4.8% didn’t answer.
Is Caergeiliog good for families?
27% of households had dependent children in 2021, against 27% across Wales’s towns. Schools are on Caergeiliog’s schools page.
How many people speak Welsh in Caergeiliog?
173 residents aged 3 and over, 47%, 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.