Photo: Jeff Buck · CC BY-SA 2.0A median age of 58.9: Malltraeth is older than 99% of UK towns
Compared with 14% across Wales’s towns, 2.3% of households live in a flat or apartment here. 274 residents in 132 households: that is Malltraeth at the 2021 Census. On the census count, 16% of households have dependent children. Fewer households without a car or van than in 93% of UK towns: 7.6%.
In Malltraeth, 39% of residents are 65 or over, more than in 99% of UK towns
Share of residents in each five-year age band, Census 2021.
Residents aged 15 to 24: 6.2% here and 12% across Wales’s towns. To put it in context, 21% of residents are 65 or over across Wales’s towns.
Broad ages · share of residents
Women and men · all residents
49% women, 51% men
About 106 men for every 100 women. Across Wales, 51% of residents are women.
Only 2.5% of adults are full-time students in Malltraeth
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: 6.2% here and 9.1% across Wales’s towns. Against that, 8% of adults are full-time students across Wales’s towns.
Smaller households than 92% of UK towns: 2.1 people on average
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.
The share of one-person households tops 86% of UK towns: 35%. The census found that 3.8% of households are unrelated adults sharing a home in Malltraeth.
More households in detached houses than 81% of UK towns: 43%
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
Where 29% of households live in a terraced house across Wales’s towns, Malltraeth has 25%. Against that, nearly a quarter of households live in a detached house across Wales’s towns.
Malltraeth sits below 96% of UK towns for residents born outside the UK (2.5%)
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
By birthplace, the largest groups from abroad were born in EU countries (1.5%) and in the rest of Europe (0.7%). At 99%, the share of residents whose main language is English is higher than in 72% of UK towns. For comparison, 7.4% of residents were born outside the UK across Wales’s towns.
Welsh, spoken by 60% of Malltraeth’s residents
Welsh language skills, residents aged 3 and over, Census 2021.
Welsh language skills · residents aged 3 and over
Some 164 people here aged 3 and over said in 2021 that they can speak Welsh, 60% of the total, against 16% across Welsh towns: more than in 95% of them. Within Gwynedd, Caernarfon has the largest share, 82%.
In Malltraeth, 97% of residents describe themselves as White British, more than in 97% 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: 97% of Malltraeth · Gwynedd’s towns 93% · Wales’s towns 90%.
Religion · all residents
43% of residents describe themselves as Christian across Wales’s towns, against 56% in Malltraeth. Lower than in 86% of UK towns: 34% of residents said they have no religion. Across Wales’s towns, 90% of residents describe themselves as White British.
Malltraeth sits above 73% of UK towns for adults who have never married (36%)
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
With married adults and civil partners at 46%, Malltraeth is behind three fifths of UK towns on that count. For Malltraeth, the census puts unpaid carers at 8.7%. Across Wales’s towns, adults who have never married come to 38%.
Degree-level qualifications: 31% of adults
Highest qualification, residents 16 and over, Census 2021.
Highest qualification · residents 16 and over
31% of Malltraeth’s adults have a degree-level qualification, against 31% across Wales’s towns; 25% have none (20%).
No nearby town is as old as Malltraeth
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 |
|---|---|---|---|---|---|
| Malltraeth | 274 | — | 58.9 | 39% | 16% |
| Gaerwen | 1,277 | 5.2 mi | 39.8 | 19% | 30% |
| Llangefni | 5,264 | 5.6 mi | 39.5 | 20% | 31% |
| Caernarfon | 9,831 | 6.3 mi | 39.6 | 19% | 28% |
| Y Felinheli | 2,333 | 7.4 mi | 42.9 | 21% | 25% |
| Bethel | 1,091 | 7.8 mi | 44.7 | 24% | 32% |
| Llanfair Pwllgwyngyll | 2,905 | 8.1 mi | 52 | 33% | 22% |
| Bodedern | 1,193 | 8.3 mi | 41.2 | 20% | 29% |
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 Malltraeth’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 Malltraeth’s residents
What is the population of Malltraeth?
The 2021 Census counted 274 people in Malltraeth’s built-up area.
What is the average age in Malltraeth?
The median age was 58.9 at the 2021 Census. 6.2% of residents were 15 to 24 and 39% were 65 or over.
How diverse is Malltraeth?
97% of residents described themselves as White British in 2021, against 90% across Wales’s towns and 93% across Gwynedd’s towns. 2.5% were born outside the UK.
What religion are people in Malltraeth?
34% said they had no religion and 56% that they were Christian at the 2021 Census; 0.7% were Muslim and 9% didn’t answer.
Is Malltraeth good for families?
16% of households had dependent children in 2021, against 27% across Wales’s towns. Schools are on Malltraeth’s schools page.
How many people speak Welsh in Malltraeth?
164 residents aged 3 and over, 60%, 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.