Engine Sheds, Stack and Turntable · Photo: Gillett's Crossing from Bristol, United Kingdom · CC BY 2.0No religion: 50% of residents, a higher share than 93% of UK towns
7.7% of households live in a flat or apartment (England’s towns: 23%). St Blazey had 6,569 residents and 2,810 households at the 2021 Census, with a median age of 44.2 (younger than 52% of UK towns). On the census count, 28% of households are one person living alone. Residents aged 15 to 24 are more common here than in nearly two thirds of UK towns.
What the Census says about St Blazey’s people
More with no religion than most
50% of residents answered “no religion” in 2021 and 43% 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.
A change of +2% since 2011 leaves St Blazey behind 78% of UK towns
ONS mid-year estimates, each year indexed to mid-2011 = 100. St Blazey’s figure is the small areas (2021 LSOAs) that make up the town.
People, mid-2011 = 100
Change by age, 2011 to 2024
About 6,900 people in 2011; 7,000 in 2024.
Change by age ran from +23% for the 65 and over to −11% for the 16 to 29. The biggest one-year rise was mid-2013 to mid-2014, 160 people.
St Blazey is younger than 52% of UK towns: a median age of 44.2
Share of residents in each five-year age band, Census 2021.
50–54 is the most common age band: 7.8% of residents. In Tywardreath, the oldest of Cornwall’s towns by this measure, it is 35%.
Median age of UK towns of 2,500+
■ St Blazey, 44.2. The typical town is 44.4.
Broad ages · share of residents
Women and men · all residents
52% women, 48% men
About 91 men for every 100 women. Across England, 51% of residents are women.
5.2% of adults are full-time students, more than in 66% 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 England’s towns, 33% of adults are in managerial and professional jobs and 24% in routine work; in St Blazey, 23% and 32%. Set beside that, 7.9% of adults are full-time students across England’s towns. The share of residents who moved in within the year stands at 8.3%.
The Census was taken on 21 March 2021, in term time, so students were counted at their term addresses.
4% of households are unrelated adults sharing a home, a share 92% of UK towns don’t reach
Household make-up at the 2021 Census. Each square is 1% of households.
Against Cornwall’s towns and England’s towns
People per household
England’s towns.
Households average 2.3 people, against 2.4 across England’s towns. 29% of households have dependent children, more than in 68% of UK towns. The wider picture: 4.3% of households are unrelated adults sharing a home across England’s towns.
A smaller share of households in detached houses than 73% of UK towns: 20%
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
15% of households have no car or van; across England’s towns the figure is 24%. As a reference point, just over a fifth of households live in a detached house across England’s towns. Locally, 22% of households live in a terraced house.
Residents born outside the UK: 3.1%, a lower share than 89% 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
99% of residents have English as their main language, against 90% across England’s towns. The two biggest birthplaces abroad are in EU countries (1.5%) and in the Middle East and Asia (0.6%). As a yardstick, 18% of residents were born outside the UK across England’s towns.
A higher White British share than 88% of UK towns: 96% of residents
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 St Blazey · Cornwall’s towns 93% · England’s towns 73%.
Religion · all residents
Next after White British come Other White (1.7%), Mixed or multiple (1%) and Chinese (0.2%). Fewer residents who describe themselves as Christian than in 87% of UK towns: 43%. Residents who describe themselves as White British make up 73% across England’s towns.
Unpaid carers make up 10% in St Blazey, more than in 69% 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
Unpaid carers giving 50 hours or more a week: 206. Adults who have never married are more common here than in 57% of UK towns. To put it in context, 8.7% of residents give unpaid care across England’s towns. At 44%, the share of married adults and civil partners is in line with the figure across England’s towns.
Qualified to degree level: 22% of adults
Highest qualification, residents 16 and over, Census 2021.
Highest qualification · residents 16 and over
In St Blazey, 22% of adults hold a degree-level qualification, against 34% across England’s towns, while 19% have no qualification at all (18%).
Ranked by age, 189th youngest of 473 UK towns this size
Median age, Census 2021. Hover a dot for its students and residents born abroad; click for its page.
Red Lodge is the youngest (30.9); Barton on Sea the oldest (65.3). Nearest to St Blazey in age: Worsbrough (44.2), Hagley (44.2), Treorchy (44.2) and Market Weighton (44.3).
Among its 7 nearest neighbours, 5 are older than St Blazey
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 |
|---|---|---|---|---|---|
| St Blazey | 6,569 | — | 44.2 | 22% | 29% |
| Tywardreath | 2,589 | 1.1 mi | 55.7 | 35% | 20% |
| Carlyon Bay | 1,174 | 1.5 mi | 62.8 | 47% | 16% |
| St Austell | 24,361 | 2.6 mi | 45 | 23% | 26% |
| Penwithick | 1,706 | 2.9 mi | 36.7 | 16% | 39% |
| Fowey | 2,027 | 3.5 mi | 55 | 33% | 20% |
| Lostwithiel | 3,067 | 4.5 mi | 51.6 | 29% | 21% |
| Bugle | 2,430 | 4.5 mi | 38.4 | 16% | 30% |
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.
- “Cornwall’s towns” and “England’s towns” mean their built-up areas. Census comparisons pool every built-up area in Cornwall (or England), summed the same way as St Blazey’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. St Blazey’s trend uses the small areas (2021 LSOAs) with most of their people inside it: 6,925 people in 2021, against 6,569 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 St Blazey’s residents
What is the population of St Blazey?
The 2021 Census counted 6,569 people in St Blazey’s built-up area. The ONS estimates the same small areas held 7,000 people in mid-2024, 2% more than in 2011.
What is the average age in St Blazey?
The median age was 44.2 at the 2021 Census, younger than 52% of UK towns. 10% of residents were 15 to 24 and 22% were 65 or over.
How diverse is St Blazey?
96% of residents described themselves as White British in 2021, against 73% across England’s towns and 93% across Cornwall’s towns. 3.1% were born outside the UK.
What religion are people in St Blazey?
50% said they had no religion and 43% that they were Christian at the 2021 Census; 0.1% were Muslim and 6.6% didn’t answer.
Is St Blazey good for families?
29% of households had dependent children in 2021, against 29% across England’s towns. Schools are on St Blazey’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. 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.