Photo: John Baker · CC BY-SA 2.0

57.2Median age

Who lives here · ONS Census 2021

Older than 98% of UK towns: half of Cemaes is over 57.2

Households in flats make up 4%, against 14% across Wales’s towns. One-person households: 38% of the total. At 58%, the share of households in detached houses is higher than in 95% of UK towns. Cemaes had 1,023 residents in 522 households at the 2021 Census.

37%aged 65 or over 2.7%born abroad 522households

What stands out · In brief

What the Census says about Cemaes’s people

46%of residents aged 3 and over can speak Welsh; Welsh towns 16%57.2median age, older than 98% of UK towns 13%of residents give unpaid care; Wales’s towns 10%

A Welsh-speaking village

457 residents, 46% of those aged 3 and over, said they can speak Welsh in 2021, more than in 89% of Welsh towns. Welsh language ↓

Older than most towns

Half of Cemaes’s residents are under 57.2 and half over, against 44.4 in the typical UK town. 37% are 65 or over, against 21% across Wales’s towns. Ages ↓

Many carers

130 residents gave unpaid care to someone with an illness, disability or old age in 2021, 13% of those 5 and over: more than in 99% of UK towns. Relationships & caring ↓

Written from the data on this page: ONS Census 2021 (output areas summed to the 2022 built-up area).

Ages

Cemaes sits above 98% of UK towns for residents aged 65 and over (37%)

Share of residents in each five-year age band, Census 2021.

CemaesWales’s towns

0–410–1420–2430–3440–4450–5460–6470–7480–84

With residents aged 15 to 24 at 6.3%, Cemaes is behind 99% of UK towns on that count. Against that, 21% of residents are 65 or over across Wales’s towns.

Broad ages · share of residents

Under 1512%

15 to 246.3%

25 to 4417%

45 to 6428%

65 and over37%

CemaesGwynedd’s townsWales’s towns

Women and men · all residents

51% women, 49% men

Cemaes

Wales

WomenMen

About 95 men for every 100 women. Across Wales, 51% of residents are women.

Students & newcomers

Full-time students: 3.9%, a lower share than 87% 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

Full-time students3.9%

Higher managerial and professional11%

Lower managerial and professional21%

Intermediate11%

Small employers and self-employed15%

Supervisory and technical6.1%

Semi-routine14%

Routine11%

Never worked or long-term unemployed6.8%

CemaesGwynedd’s townsWales’s towns

Address a year before the Census

Residents who lived somewhere else a year earlier. The bar runs to 25%.

Cemaes

9.8%

Wales’s towns

9.8%

Moved within the UKTerm-time addressMoved from abroad

Moved in within a year

residents, 9.5%; Wales’s towns 9.1%

Of them from abroad

0.4× Wales’s share

Across Wales’s towns, 29% of adults are in managerial and professional jobs and 27% in routine or semi-routine work; Cemaes has 32% and 25%. Full-time students: 8% across Wales’s towns, for comparison. The share of residents who moved in within the year stands at 9.5%.

Households

Fewer households with dependent children than 97% of UK towns: 18%

Household make-up at the 2021 Census. Each square is 1% of households.

Living alone, 66+ 21%Living alone, under 66 17%Families with dependent children 18%Couples and families, no young children 42%Shared houses and other 2.3%

Against Gwynedd’s towns and Wales’s towns

Cemaes

Gwynedd’s towns

Wales’s towns

People per household

1 person38%

2 people41%

3 people12%

4 people6.5%

5 or more2.7%

Wales’s towns.

The typical household size is 2 people, against 2.3 across Wales’s towns. Households with dependent children: 27% across Wales’s towns, for comparison. Shared households of unrelated adults are rarer here than in 52% of UK towns.

Homes & cars

A smaller share of households without a car or van than 56% 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

Cemaes

Gwynedd’s towns

Wales’s towns

DetachedSemi-detachedTerracedFlat or maisonetteCaravan or other

Cars or vans · share of households

No car or van14%

One45%

Two32%

Three or more8.3%

CemaesGwynedd’s townsWales’s towns

19% of households live in a terraced house; across Wales’s towns the figure is 29%. Across Wales’s towns, 21% of households have no car or van.

Where people were born

Only 2.7% of Cemaes’s 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%

Cemaes

2.7%

Gwynedd’s towns

5.4%

Wales’s towns

7.4%

EU countriesRest of EuropeMiddle East and AsiaAfricaAmericas, Oceania, other

Main language · residents aged 3 and over

English is main language100%

Another main language, speaks English very well or well0.4%

Another main language, little or no English0%

CemaesGwynedd’s townsWales’s towns

The share of residents whose main language is English is 100%, against 96% across Wales’s towns. The largest groups were born in EU countries (1.3%) and in Africa (0.7%). Set beside that, 7.4% of residents were born outside the UK across Wales’s towns.

Welsh language

Of Cemaes’s residents, 46% can speak Welsh

Welsh language skills, residents aged 3 and over, Census 2021.

Welsh language skills · residents aged 3 and over

Can speak Welsh46%

Can speak, read and write Welsh36%

Any Welsh skill (including understanding only)58%

CemaesGwynedd’s townsWales’s towns

46% of residents aged 3 and over, 457 people, said in 2021 that they can speak Welsh, more than in 89% of Welsh towns (Welsh towns: 16%). Caernarfon leads Gwynedd with 82%.

Ethnicity & religion

Residents who describe themselves as White British: 99%, a higher share than 99% 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

CemaesGwynedd’s townsWales’s towns

Other White0.6%

Asian0.1%

Mixed0.2%

Black0.1%

Other0.2%

0%2%4%

White British, not charted: 99% of Cemaes · Gwynedd’s towns 93% · Wales’s towns 90%.

Religion · all residents

CemaesGwynedd’s townsWales’s towns

No religion39%

Christian53%

Muslim0%

Hindu, Sikh, Jewish, Buddhist0.3%

Other religion0.5%

Didn’t answer7%

0%30%60%

On religion, 39% answered “no religion” and 53% Christian, against 47% and 43% across Wales’s towns. By contrast, residents who describe themselves as Christian are more common here than in 72% of UK towns. Against that, nine in ten residents describe themselves as White British across Wales’s towns.

Relationships & caring

In Cemaes, 13% of residents give unpaid care, more than in 99% 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

Never married or in a civil partnership27%

Married or civil partnership47%

Separated1.7%

Divorced14%

Widowed10%

CemaesGwynedd’s townsWales’s towns

130residents give unpaid care to someone with an illness, disability or old age: 13%, against 10% in Wales’s towns

Unpaid care given · share of residents 5 and over

Up to 19 hours a week5.8%

20 to 49 hours3.5%

50 hours or more4%

27% of adults have never married or formed a civil partnership; across Wales’s towns the figure is 38%. The census found that 47% of adults are married or in a civil partnership in Cemaes. The benchmark for unpaid carers across Wales’s towns: 10%.

Qualifications

31% of adults have qualifications at degree level

Highest qualification, residents 16 and over, Census 2021.

Highest qualification · residents 16 and over

No qualifications17%

Apprenticeship10%

A levels or similar15%

Degree level31%

CemaesGwynedd’s townsWales’s towns

Cemaes’s adults: 31% with a degree-level qualification and 17% with none, against 31% and 20% across Wales’s towns.

Neighbours

A younger town than 1 of the 6 around it: Cemaes

Nearby built-up areas coloured by median age, Census 2021. Tap a town for its page.

AmlwchLlanerchymeddBodedernValleyHolyheadBenllechCemaes

under 3838–4444–5050–5656+

Town	People	Away	Median age	65+	Homes with children
Cemaes	1,023	—	57.2	37%	18%
Amlwch	3,148	4.5 mi	46.6	23%	26%
Llanerchymedd	1,155	6.5 mi	44.3	21%	30%
Bodedern	1,193	8.5 mi	41.2	20%	29%
Valley	2,003	9.8 mi	51.2	29%	23%
Holyhead	11,753	10.4 mi	39.4	18%	29%
Benllech	2,072	11.2 mi	62	45%	13%

More about Cemaes’s residents

Health, work and homes have their own pages

Health C⁻Life expectancy, early deaths and Census health, adjusted for age Work & commute D⁻Income, the claimant count, jobs and how people get to work Cost of living B⁺Owners and renters, prices, rents and council tax SchoolsEvery primary and secondary, with results and inspections

How to read these numbers

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 Cemaes’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 Cemaes’s residents

What is the population of Cemaes?

The 2021 Census counted 1,023 people in Cemaes’s built-up area.

What is the average age in Cemaes?

The median age was 57.2 at the 2021 Census. 6.3% of residents were 15 to 24 and 37% were 65 or over.

How diverse is Cemaes?

99% of residents described themselves as White British in 2021, against 90% across Wales’s towns and 93% across Gwynedd’s towns. 2.7% were born outside the UK.

What religion are people in Cemaes?

39% said they had no religion and 53% that they were Christian at the 2021 Census; 0% were Muslim and 7% didn’t answer.

Is Cemaes good for families?

18% of households had dependent children in 2021, against 27% across Wales’s towns. Schools are on Cemaes’s schools page.

How many people speak Welsh in Cemaes?

457 residents aged 3 and over, 46%, 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.