A higher share of second homes than 99% of compared French towns, at 69%
Empty homes make up 0.2%, against 6.7% in the typical compared French town. About one in nine: that is how common couples with children are in Biert (11%). On households headed by a manual worker, Biert sits lower than 94% of compared French towns: 5.9%. This Ariège town had 303 residents in 180 households at the 2023 census.
Throughout this page, the Ariège median and the France median are the median of compared communes (those with an overall grade), each figure its own median. Source: INSEE, census 2023.
What stands out about the people of Biert
One home in two is a second home
The census counted 400 second homes and occasional dwellings in Biert, 69% of its 580 homes: higher than in 99% of compared French towns. 99% of them are houses. Their owners live elsewhere, so they aren’t in the population figures on this page. Homes & cars ↓
An older town
Half of Biert’s residents are under 55.9 and half over; the median of compared French towns is 44. 32% are 65 or older (France median 22%), 5.1% 80 or older. Ages ↓
Many people living alone
50% of Biert’s households are one person: higher than in 94% of compared French towns; 41% of residents 65 and over live alone. Households ↓
Immigrants
INSEE counts 0 immigrants in Biert (people born abroad who weren’t French at birth, whatever their nationality now): 16% of residents, against 9.1% for the median compared commune in Ariège. 14% are foreign nationals. Immigrants and foreign nationals ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A lower share of flats than 99% of compared French towns, at 0.9%
Every home the census counted: main residences, second homes and occasional dwellings (INSEE counts them together), and empty homes. Owning and renting are on Cost of living.
All homes · share of homes
Type of home
Cars per household · share of households
Here 6.4% of households have no car, where the figure in the typical compared French town is 11%. To put it in context, 30% of homes are flats in the typical compared French town.
−1% since 2012, a pace below 72% of compared French towns
Residents at INSEE’s last three censuses, each recast in the 2026 commune boundaries. France has no yearly estimate by commune between censuses.
2012 to 2023
2017 to 2023
Over the whole period the median compared French town changed +5%, and the median Ariège town +2%. The years 2012 to 2017 brought +4%; 2017 to 2023, −4%.
Half of Biert is over 55.9, older than 95% of compared French towns
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Biert 55.9. The median compared French town: 44.
Residents aged 15 to 24: 5.6% here and 11% in the typical compared French town. Put another way, about one in three: nearly a third of residents are 65 or over.
Women and men · all residents
49% women, 51% men
About 106 men for every 100 women. Median share of women: Ariège 52.2%, France 51.8%.
Biert ranks above 94% of compared French towns on one-person households: 50%
A household is everyone who shares a main home (résidence principale). Household types come from INSEE’s fuller sample of a quarter of census forms.
Against the Ariège median and the France median
Living alone · share
Each household has 1.7 people on average. Single-parent households are rarer here than in 97% of compared French towns. In the typical compared French town, the share of one-person households is 35%.
The median resident lives on €17,950 a year per consumption unit
The standard of living (niveau de vie) is a household’s disposable income after taxes and benefits, divided by its consumption units (UC) to allow for its size and make-up: 1 for the first adult, 0.5 for each other person 14 or older, 0.3 for each child under 14.
Medians of compared communes. Source: INSEE, Filosofi 2023.
Half of residents live in households above €17,950 a year per consumption unit and half below; the level is lower than in 99% of compared French towns.
In Biert, 38% of households are headed by a retired person, more than in 78% of compared French towns
Households by the socio-professional group (PCS) of their reference person, INSEE’s own categories. Jobs and commuting are on the Work & commute page.
Households by reference person’s group · share of households
Against a figure of 9.4% in the typical compared French town, the share of households headed by a manager or professional in Biert comes in at 12%. For households headed by a retired person, the comparison in the typical compared French town is 32%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
A higher share of immigrants than 88% of compared French towns, at 16%
INSEE publishes two measures, which overlap but aren’t the same. Neither is the UK’s “born abroad”.
Share of residents · census 2023
Immigrant (immigré)
Born abroad, not French at birth. Someone stays an immigrant after becoming French. A French citizen born abroad (for example in Algeria before 1962) is not one.
Foreign national (étranger)
Not a French citizen today, wherever born. A child born in France to foreign parents can be a foreign national without being an immigrant.
4.3% of residents are foreign nationals in the typical compared French town, against 14% in Biert. Immigrants make up 6.5% in the typical compared French town.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Married residents: 30%, a lower share than 98% of compared French towns
Residents 15 and over by how they live: the census asks both the legal status and whether people live as a couple.
Residents 15 and over · share
Where a quarter of residents 15 and over are single in the typical compared French town, Biert has 31%. Married residents make up 43% in the typical compared French town.
In Biert, 11% of adults out of school have no qualification, fewer than in 90% of compared French towns
Highest diploma of residents 15 and over who have left education, in French terms: the levels don’t map one-to-one to UK or U.S. ones.
Highest diploma · 15 and over, out of education
By its share of graduates of higher education (41%), Biert is above 82% of compared French towns. Measured more widely, 19% of adults out of school have no qualification in the typical compared French town.
41 French towns of 303 to 2,582 people: this is the 5th oldest
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
Villejust is the youngest (37.2); Prayssac the oldest (62.3).
Every neighbor is younger than Biert
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Biert | 55.9 | 32% | 69% | 16% |
| Saint-Girons 6,008 · 10.1 mi | 51.9 | 33% | 6.7% | 9.1% |
| Tarascon-sur-Ariège 3,085 · 15.2 mi | 51.4 | 32% | 8% | 18% |
| Foix 9,934 · 15.6 mi | 46.8 | 27% | 7.6% | 15% |
Health, work, housing and schools
What this data can and can’t tell you
- Census 2023. INSEE’s census is a rolling survey: a fifth of small communes each year, 8% of homes in large ones each year. “2023” pools the surveys of 2021 to 2025, so the figures describe the town around 2023, not on one day.
- Medians of compared communes. The comparisons are the median of the département’s compared communes and of France’s (those with an overall grade), each figure its own median: not the total for the département or for France, which large cities pull towards their own figures.
- Immigrants and foreign nationals. INSEE’s two measures: an immigrant was born abroad without French nationality; a foreign national isn’t French today. Neither is a count of people born abroad, which INSEE doesn’t publish by commune.
- Second homes. Homes used for holidays or weekends, with occasional dwellings (kept for work, for example), which INSEE counts together. Their owners are counted where they live, not here.
- Standard of living. INSEE’s Filosofi: disposable income per consumption unit, from tax and benefit files, 2023. The poverty rate is the share of residents below 60% of France’s median. Not published for the smallest communes.
- What France doesn’t ask. The French census asks nothing about ethnicity, religion, language or health, so this page has no such section.
Questions about who lives in Biert
What is the population of Biert?
303 at INSEE’s 2023 census, about the same as in 2012 (305).
How old are Biert’s residents?
The median age is 55.9, older than 95% of compared French towns. 12% are under 18 and 32% 65 or older.
How many second homes are there in Biert?
400, with occasional dwellings: 69% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Biert?
INSEE counts 50 immigrants (born abroad, not French at birth), 16% of residents, and 44 foreign nationals (14%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Biert?
€17,950 a year per consumption unit in 2023 (median of compared French towns €25,970). Source: INSEE, Filosofi.
Sources: INSEE, census 2023 (population, ages, households, homes, marital status, diplomas, immigrants, foreign nationals, employment), 2026 geography · INSEE, Filosofi 2023 (standard of living, poverty) · IGN Admin Express (boundaries) · Medians and percentiles: TownRatings, over compared French towns, updated October 30, 2026. Under the Licence Ouverte / Open Licence 2.0 (Etalab).
Contains public sector information under the Licence Ouverte / Open Licence 2.0 (Etalab): INSEE, DGFiP, the Interior Ministry’s statistics service (SSMSI), the Ministry of Education (DEPP), the Health Ministry’s statistics service (DREES) and the Housing Ministry (Carte des loyers). Commune boundaries: IGN Admin Express.