Photo: Sally Lloyd · CC BY-SA 2.0Younger than 91% of UK towns: half of Markham is under 37.2
44% of adults have never married or formed a civil partnership; across Wales’s towns the figure is 38%. There were 601 households in Markham at the 2021 Census, home to 1,443 residents. Here, 97% of residents describe themselves as White British. On households in terraced houses, Markham sits higher than 95% of UK towns: 42%.
What the Census says about Markham’s people
More with no religion than most
61% of residents answered “no religion” in 2021 and 31% Christian, against 47% and 43% across Wales’s towns. Ethnicity & religion ↓
A village of families
35% of Markham’s 601 households had dependent children in 2021, more than in 93% of UK towns. 21% of residents are under 15. Households ↓
Younger than most towns
Half of Markham’s residents are under 37.2 and half over, against 44.4 in the typical UK town. 13% are 15 to 24 and 18% are 65 or over. Ages ↓
Written from the data on this page: ONS Census 2021 (output areas summed to the 2022 built-up area).
Below 80% of UK towns: 18% of residents are 65 or over
Share of residents in each five-year age band, Census 2021.
The biggest five-year age group is 5–9, with 7.6% of residents, 1.3 times the share across Wales’s towns. By way of comparison, 21% of residents are 65 or over across Wales’s towns. In Markham, 13% of residents are aged 15 to 24.
Broad ages · share of residents
Women and men · all residents
51% women, 49% men
About an even split. Across Wales, 51% of residents are women.
Markham ranks above 86% of UK towns on full-time students: 6.2%
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; Markham has 16% and 38%. 8.6% of residents lived at another address a year earlier, fewer than in 52% of UK towns. Set beside that, 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.
A higher share of households with dependent children than 93% of UK towns, at 35%
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.
Shared households of unrelated adults make up 3.5%, close to the figure across Wales’s towns. At 28%, the share of one-person households is lower than in 69% of UK towns. The comparison figure for households with dependent children is 27% across Wales’s towns. A household here holds 2.4 people on average.
7.1% of households live in a detached house, fewer than in 97% 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, a quarter of households have no car or van in Markham. 2% of households live in a flat, less than in 97% of UK towns; 7.1% in a detached house, against 24% across Wales’s towns.
Only 2.6% of residents were born outside the UK in Markham
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
Residents whose main language is English make up 98%, against 96% across Wales’s towns. The wider picture: 7.4% of residents were born outside the UK across Wales’s towns. The two biggest birthplaces abroad are in EU countries (1.4%) and in the Middle East and Asia (0.4%).
Of Markham’s residents, 8% can speak Welsh
Welsh language skills, residents aged 3 and over, Census 2021.
Welsh language skills · residents aged 3 and over
The 2021 Census found 112 Welsh speakers aged 3 and over, 8% of that age group, against 16% across Welsh towns: fewer than in 87% of them. Top of Gwent: Abertridwr and Senghenydd, at 14%.
A higher share of residents with no religion than 99% of UK towns, at 61%
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 Markham · Gwent’s towns 91% · Wales’s towns 90%.
Religion · all residents
Across Wales’s towns, 43% of residents describe themselves as Christian; in Markham, 31%. Measured more widely, 47% of residents said they have no religion across Wales’s towns.
Markham sits above 99% of UK towns for unpaid carers (13%)
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
43% of adults are married or in a civil partnership across Wales’s towns, against 38% in Markham. Across Wales’s towns, unpaid carers come to 10%.
Degree level: the highest qualification of 20% of adults
Highest qualification, residents 16 and over, Census 2021.
Highest qualification · residents 16 and over
Across Wales’s towns, 20% of adults have no qualification; in Markham, 29%, while 20% hold one at degree level (31%). Many still at university: 15% list A levels as their highest qualification.
No nearby town is as young as Markham
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 |
|---|---|---|---|---|---|
| Markham | 1,443 | — | 37.2 | 18% | 35% |
| Aberbargoed | 4,412 | 1.1 mi | 37.8 | 16% | 33% |
| Bargod | 8,034 | 1.7 mi | 41.4 | 21% | 28% |
| New Tredegar | 3,280 | 1.8 mi | 40.8 | 19% | 28% |
| Oakdale | 6,126 | 2.3 mi | 41.9 | 19% | 33% |
| Blackwood | 12,621 | 2.5 mi | 45.5 | 23% | 27% |
| Trinant | 1,504 | 2.6 mi | 39.6 | 19% | 31% |
| Cwm | 2,507 | 2.6 mi | 44.8 | 22% | 25% |
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.
- “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 Markham’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 Markham’s residents
What is the population of Markham?
The 2021 Census counted 1,443 people in Markham’s built-up area.
What is the average age in Markham?
The median age was 37.2 at the 2021 Census. 13% of residents were 15 to 24 and 18% were 65 or over.
How diverse is Markham?
97% of residents described themselves as White British in 2021, against 90% across Wales’s towns and 91% across Gwent’s towns. 2.6% were born outside the UK.
What religion are people in Markham?
61% said they had no religion and 31% that they were Christian at the 2021 Census; 0.5% were Muslim and 6.8% didn’t answer.
Is Markham good for families?
35% of households had dependent children in 2021, against 27% across Wales’s towns. Schools are on Markham’s schools page.
How many people speak Welsh in Markham?
112 residents aged 3 and over, 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.