Photo: John Grayson · CC BY-SA 2.06.2% of residents are aged 15 to 24, fewer than in 99% of UK towns
Across Wales’s towns, the share of households without a car or van is 21%; Castleton has 6.4%. Households in terraced houses account for 4.4%. Married adults and civil partners are more common here than in 95% of UK towns. At the 2021 Census, 834 people lived in the village, in 299 households.
Castleton is older than 83% of UK towns: a median age of 49.5
Share of residents in each five-year age band, Census 2021.
55–59 is the most common age band: nearly one in ten residents. Higher than in 84% of UK towns: 28% of residents are 65 or over. In Abergavenny, the oldest of Gwent’s towns by this measure, it is 27%.
Broad ages · share of residents
Women and men · all residents
53% women, 47% men
About 88 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.
4.2% of adults are full-time students, below 77% 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%.
Across Wales’s towns, 29% of adults are in managerial and professional jobs and 27% in routine or semi-routine work; Castleton has 54% and 11%. The wider picture: 8% of adults are full-time students across Wales’s towns. The census found that 9.9% of residents lived at another address a year earlier here.
Only 20% of households in Castleton are one person living alone
Household make-up at the 2021 Census. Each square is 1% of households.
Against Gwent’s towns and Wales’s towns
People per household
Wales’s towns.
A household here has 2.6 people on average; across Wales’s towns, 2.3. The benchmark for one-person households across Wales’s towns: 32%. Locally, 3.3% of households are unrelated adults sharing a home. Households with dependent children are more common here than in 83% of UK towns.
71% of households live in a detached house, a share 99% of UK towns don’t reach
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 14% of households live in a flat or apartment across Wales’s towns, Castleton has 7.7%. The usual figure: nearly a quarter of households live in a detached house across Wales’s towns.
More residents whose main language is English than 63% of UK towns: 98%
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
The two biggest birthplaces abroad are in the Middle East and Asia (3%) and in EU countries (1.4%). Residents born outside the UK are rarer here than in 54% of UK towns. Against that, 96% of residents have English as their main language across Wales’s towns.
Castleton’s Welsh speakers make up 6.8% of residents
Welsh language skills, residents aged 3 and over, Census 2021.
Welsh language skills · residents aged 3 and over
At the 2021 Census, 55 residents aged 3 and over, 6.8%, said they can speak Welsh, against 16% across Welsh towns: fewer than in 96% of Welsh towns. In Gwent, Abertridwr and Senghenydd has the highest share (14%).
Castleton sits above 94% of UK towns for residents who describe themselves as Christian (60%)
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: 91% of Castleton · Gwent’s towns 91% · Wales’s towns 90%.
Religion · all residents
Beyond White British, the biggest groups are Indian (2.3%), Other White (2.2%) and Arab (1%). Compared with other places, residents with no religion are scarce here: 32%, fewer than in 90% of UK towns. By way of comparison, 43% of residents describe themselves as Christian across Wales’s towns. Residents who describe themselves as White British: 91%, below three fifths of UK towns.
Adults who have never married: 20%, a lower share than 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
Unpaid care given · share of residents 5 and over
The number giving 50 or more hours of unpaid care a week is 17. At 9.2%, the share of unpaid carers is lower than in 55% of UK towns. Across the comparison, 38% of adults have never married or formed a civil partnership across Wales’s towns.
Qualified to degree level: 45% of adults
Highest qualification, residents 16 and over, Census 2021.
Highest qualification · residents 16 and over
At degree level, Castleton counts 45% of its adults, against 31% across Wales’s towns; at the other end, 10% have no qualification (20%).
The towns around Castleton are all younger
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 |
|---|---|---|---|---|---|
| Castleton | 834 | — | 49.5 | 28% | 32% |
| Marshfield | 2,386 | 0.9 mi | 42.6 | 15% | 38% |
| Rogerstone | 7,546 | 3.6 mi | 45 | 21% | 31% |
| Machen | 1,985 | 4.4 mi | 47 | 22% | 28% |
| Risca | 15,194 | 4.8 mi | 44.1 | 21% | 26% |
| Newport | 130,882 | 5 mi | 37.4 | 16% | 31% |
| Trethomas | 1,713 | 5.1 mi | 33.8 | 14% | 38% |
| Cardiff | 348,511 | 5.4 mi | 34.5 | 14% | 28% |
Health, work and homes have their own pages
What this data can and can’t tell you
- “Gwent’s towns” and “Wales’s towns” mean their built-up areas. Census comparisons pool every built-up area in Gwent (or Wales), summed the same way as Castleton’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 Castleton’s residents
What is the population of Castleton?
The 2021 Census counted 834 people in Castleton’s built-up area.
What is the average age in Castleton?
The median age was 49.5 at the 2021 Census. 6.2% of residents were 15 to 24 and 28% were 65 or over.
How diverse is Castleton?
91% of residents described themselves as White British in 2021, against 90% across Wales’s towns and 91% across Gwent’s towns. 6% were born outside the UK.
What religion are people in Castleton?
32% said they had no religion and 60% that they were Christian at the 2021 Census; 1.4% were Muslim and 4.4% didn’t answer.
Is Castleton good for families?
32% of households had dependent children in 2021, against 27% across Wales’s towns. Schools are on Castleton’s schools page.
How many people speak Welsh in Castleton?
55 residents aged 3 and over, 6.8%, 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.