Photo: CapG · CC BY-SA 2.0A Welsh-speaking town: 39% of Llangennech’s residents speak Welsh
In Llangennech, 12% of residents give unpaid care, beside 10% across Wales’s towns. At the 2021 Census, 4,278 people lived locally, in 1,822 households. For Llangennech, the census puts households in flats at 3.2%. Compared with other places, households in detached houses are common here: 42%, more than in nearly four fifths of UK towns.
What the Census says about Llangennech’s people
A Welsh-speaking town
1,619 residents, 39% of those aged 3 and over, said they can speak Welsh in 2021, more than in 87% of Welsh towns. Welsh language ↓
Written from the data on this page: ONS Census 2021 (output areas summed to the 2022 built-up area).
A median age of 45.7: Llangennech is older than 59% of UK towns
Share of residents in each five-year age band, Census 2021.
Against a figure of 12% across Wales’s towns, the share of residents aged 15 to 24 in Llangennech comes in at 11%. Residents aged 65 and over account for 23%.
Median age of UK towns of 2,500+
■ Llangennech, 45.7. The typical town is 44.4.
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 student town: 6% of adults study full-time
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%.
The share of residents who moved in within the year trails 80% of UK towns: 7.3%. As a yardstick, 8% of adults are full-time students across Wales’s towns.
The Census was taken on 21 March 2021, in term time, so students were counted at their term addresses.
1.5% of households are unrelated adults sharing a home, below 91% of UK towns
Household make-up at the 2021 Census. Each square is 1% of households.
Against Dyfed’s towns and Wales’s towns
People per household
Wales’s towns.
Where 32% of households are one person living alone across Wales’s towns, Llangennech has 29%. The benchmark for shared households of unrelated adults across Wales’s towns: 3.1%. The average household has 2.4 people. On households with dependent children, Llangennech sits higher than 55% of UK towns: 28%.
14% of households live in a terraced house, below 77% 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
Set against 21% across Wales’s towns, just over one in ten households have no car or van in Llangennech. The comparison figure for households in terraced houses is 29% across Wales’s towns.
Only 3.1% of residents were born outside the UK in Llangennech
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%
When those born abroad arrived
Main language · residents aged 3 and over
Residents born abroad were most often born in EU countries (1.4%), then in the Middle East and Asia (0.7%). Compared with other places, residents whose main language is English are common here: 99%, more than in 83% of UK towns. Set beside that, 7.4% of residents were born outside the UK across Wales’s towns. Arrivals from 2017 on account for 13% of residents born abroad, beside 23% across Wales’s towns.
39% of people in Llangennech speak Welsh
Welsh language skills, residents aged 3 and over, Census 2021.
Welsh language skills · residents aged 3 and over
1,619 residents, 39% of those aged 3 and over, said they can speak Welsh at the 2021 Census, against 16% across Welsh towns: more than in 87% of Welsh towns. No town in Dyfed beats Tumble (62%).
96% of residents describe themselves as White British, more than in 88% 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: 96% of Llangennech · Dyfed’s towns 93% · Wales’s towns 90%.
Religion · all residents
The share of residents with no religion tops 70% of UK towns: 44%. Next after White British come Other White (2%), Mixed or multiple (0.6%) and African (0.3%). On residents who describe themselves as Christian, Llangennech sits lower than 51% of UK towns: 50%. As a reference point, 90% of residents describe themselves as White British across Wales’s towns.
A larger share of married adults and civil partners than 65% of UK towns: 50%
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
Where 38% of adults have never married or formed a civil partnership across Wales’s towns, Llangennech has 31%. The benchmark for married adults and civil partners across Wales’s towns: 43%.
The share of adults with a degree-level qualification: 33%
Highest qualification, residents 16 and over, Census 2021.
Highest qualification · residents 16 and over
In Llangennech, 33% of adults hold a degree-level qualification, against 31% across Wales’s towns, while 17% have no qualification at all (20%).
298th youngest of 695 UK towns of 3,000 to 6,000 people
Median age, Census 2021. Hover a dot for its students and residents born abroad; click for its page.
Ages run from 18.9 in Bailrigg to 64.7 in Sutton on Sea and Trusthorpe. Nearest to Llangennech in age: Welshpool (45.7), Troedyrhiw and Pentrebach (45.7), Elton (45.8) and Winslow (45.8).
No nearby town is as old as Llangennech
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 |
|---|---|---|---|---|---|
| Llangennech | 4,278 | — | 45.7 | 23% | 28% |
| Bryn | 1,727 | 1.1 mi | 35.8 | 16% | 33% |
| Hendy and Fforest | 2,996 | 1.8 mi | 42.1 | 20% | 30% |
| Grovesend | 1,148 | 2.1 mi | 43.9 | 22% | 28% |
| Loughor | 4,632 | 2.3 mi | 43.9 | 22% | 28% |
| Gorseinon | 14,114 | 2.5 mi | 42.5 | 21% | 27% |
| Pontarddulais | 6,513 | 2.5 mi | 41.8 | 19% | 30% |
| Llanelli | 42,143 | 2.8 mi | 41.9 | 20% | 28% |
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.
- “Dyfed’s towns” and “Wales’s towns” mean their built-up areas. Census comparisons pool every built-up area in Dyfed (or Wales), summed the same way as Llangennech’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 Llangennech’s residents
What is the population of Llangennech?
The 2021 Census counted 4,278 people in Llangennech’s built-up area.
What is the average age in Llangennech?
The median age was 45.7 at the 2021 Census, older than 59% of UK towns. 11% of residents were 15 to 24 and 23% were 65 or over.
How diverse is Llangennech?
96% of residents described themselves as White British in 2021, against 90% across Wales’s towns and 93% across Dyfed’s towns. 3.1% were born outside the UK.
What religion are people in Llangennech?
44% said they had no religion and 50% that they were Christian at the 2021 Census; 0.2% were Muslim and 5.3% didn’t answer.
Is Llangennech good for families?
28% of households had dependent children in 2021, against 27% across Wales’s towns. Schools are on Llangennech’s schools page.
How many people speak Welsh in Llangennech?
1,619 residents aged 3 and over, 39%, 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.