Photo: Rick Crowley · CC BY-SA 2.0Above 90% of UK towns: 49% of residents said they have no religion
Nearly a fifth of households live in a detached house; across England’s towns the figure is 21%. Locally, 18% of households have no car or van. The median age in Keynsham is 41.3, lower than in 73% of UK towns. The town’s 8,354 households held 19,257 residents at the 2021 Census.
What the Census says about Keynsham’s people
Growing faster than most
ONS mid-year estimates put Keynsham at 15,600 in 2011 and 20,900 in 2024, up 34%, against 10% for England: faster growth than in 95% of UK towns. Since 2011 ↓
More with no religion than most
49% of residents answered “no religion” in 2021 and 44% Christian, against 37% and 46% across England’s towns. Ethnicity & religion ↓
Written from the data on this page: ONS Census 2021 (output areas summed to the 2022 built-up area) and ONS mid-year population estimates.
Faster growth than 95% of UK towns: Keynsham changed by +34% since 2011
ONS mid-year estimates, each year indexed to mid-2011 = 100. Keynsham’s figure is the small areas (2021 LSOAs) that make up the town.
People, mid-2011 = 100
Change by age, 2011 to 2024
About 15,600 people in 2011; 20,900 in 2024.
Split by age, the 30 to 44 changed most (+66%) and the 45 to 64 least (+16%). In one year, mid-2017 to mid-2018, the population rose by 620, the most of any year.
Fewer residents aged 15 to 24 than 63% of UK towns: 9.4%
Share of residents in each five-year age band, Census 2021.
Residents aged 65 and over make up 22%, against 18% across England’s towns. By way of comparison, 12% of residents are aged 15 to 24 across England’s towns. No age band is larger than 30–34: 7.9% of residents.
Median age of UK towns of 2,500+
■ Keynsham, 41.3. The typical town is 44.4.
Broad ages · share of residents
Women and men · all residents
52% women, 48% men
About 93 men for every 100 women. Across England, 51% of residents are women.
11% of residents lived at another address a year earlier, more than in 84% 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%.
Compared with 7.9% across England’s towns, 4.7% of adults are full-time students here. Across England’s towns, a third of adults are in managerial and professional jobs and 24% in routine or semi-routine work; Keynsham has 39% and 22%.
2.7% of households are unrelated adults sharing a home, a share 67% of UK towns don’t reach
Household make-up at the 2021 Census. Each square is 1% of households.
Against Somerset’s towns and England’s towns
People per household
England’s towns.
27% of households have dependent children. Little separates the share of one-person households here, 30%, from the figure across England’s towns.
More terraced houses than 70% of UK towns: 26% of households
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
At 23%, the share of households in flats is in line with the figure across England’s towns. Across England’s towns, the share of households in terraced houses is 24%.
Residents born outside the UK make up 7% in Keynsham, more than in 56% of UK towns
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 25%
When those born abroad arrived
Main language · residents aged 3 and over
Among those born abroad, the share arriving in 2017 or later is 19% (England’s towns: 21%). As a yardstick, 18% of residents were born outside the UK across England’s towns. The two biggest birthplaces abroad are in EU countries (3.2%) and in the Middle East and Asia (1.6%).
In Keynsham, 44% of residents describe themselves as Christian, fewer than in 82% 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: 91% of Keynsham · Somerset’s towns 89% · England’s towns 73%.
Religion · all residents
The share of residents who describe themselves as White British is 91%, against 73% across England’s towns. To put it in context, 46% of residents describe themselves as Christian across England’s towns. Behind White British, the largest groups are Other White (4%), Mixed or multiple (2.3%) and Indian (0.5%).
34% of adults have never married or formed a civil partnership, a share 59% of UK towns don’t reach
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
465 people give 50 hours or more of unpaid care a week. Across England’s towns, nearly two in five adults have never married or formed a civil partnership. Nothing unusual on unpaid carers: 9%, close to the figure across England’s towns.
Degree-level qualifications: held by 36% of adults
Highest qualification, residents 16 and over, Census 2021.
Highest qualification · residents 16 and over
At degree level, Keynsham counts 36% of its adults, against 34% across England’s towns; at the other end, 14% have no qualification (18%).
From a median age of 38 in Keynsham South to 48 in Keynsham East
The town’s 3 neighbourhoods (ONS middle-layer areas with 500+ residents inside it, named by the House of Commons Library), youngest first. Census 2021.
Keynsham East is the oldest area, with 27% aged 65 or over; Keynsham South the youngest (median age 38). Families with children are most common in Keynsham North (29% of households).
Of 336 UK towns its size (13,000 to 26,000 people), the 82nd youngest
Median age, Census 2021. Hover a dot for its students and residents born abroad; click for its page.
At the ends of the range sit Aberystwyth (25), the youngest, and Sidmouth (60.4), the oldest. Nearest to Keynsham in age: Mountain Ash (41.2), Staines-upon-Thames (41.3), Farncombe (41.3) and Bodmin (41.3).
Nearby, 3 of 7 towns have older populations than Keynsham
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 |
|---|---|---|---|---|---|
| Keynsham | 19,257 | — | 41.3 | 22% | 27% |
| Saltford | 4,133 | 1.9 mi | 51.6 | 29% | 25% |
| Whitchurch | 1,992 | 2.4 mi | 39.1 | 18% | 32% |
| Newton St Loe | 1,372 | 3.6 mi | 18.8 | 3.2% | 19% |
| Kingswood and Fishponds | 160,280 | 4 mi | 39.2 | 17% | 29% |
| Wick | 1,579 | 4.3 mi | 50.8 | 27% | 24% |
| Farmborough | 1,106 | 4.7 mi | 48.2 | 26% | 25% |
| Bristol | 425,196 | 5.2 mi | 33.9 | 13% | 26% |
Health, work and homes have their own pages
What this data can and can’t tell you
- “Somerset’s towns” and “England’s towns” mean their built-up areas. Census comparisons pool every built-up area in Somerset (or England), summed the same way as Keynsham’s figures, so households in open countryside are left out. The population trend compares with the whole county and nation.
- Estimates since 2021 are modelled. The ONS builds mid-year estimates from the Census, births, deaths and migration records. Keynsham’s trend uses the small areas (2021 LSOAs) with most of their people inside it: 19,599 people in 2021, against 19,257 in the built-up area.
- 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 Keynsham’s residents
What is the population of Keynsham?
The 2021 Census counted 19,257 people in Keynsham’s built-up area. The ONS estimates the same small areas held 20,900 people in mid-2024, 34% more than in 2011.
What is the average age in Keynsham?
The median age was 41.3 at the 2021 Census, younger than 73% of UK towns. 9.4% of residents were 15 to 24 and 22% were 65 or over.
How diverse is Keynsham?
91% of residents described themselves as White British in 2021, against 73% across England’s towns and 89% across Somerset’s towns. 7% were born outside the UK.
What religion are people in Keynsham?
49% said they had no religion and 44% that they were Christian at the 2021 Census; 0.4% were Muslim and 6.1% didn’t answer.
Is Keynsham good for families?
27% of households had dependent children in 2021, against 29% across England’s towns. Families are most common in Keynsham North (29% of households). Schools are on Keynsham’s schools page.
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) · ONS mid-year population estimates for 2021 LSOAs, mid-2011 to mid-2024 · House of Commons Library MSOA names. 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.