Biol sits below 96% of compared French towns for households without a car (3.7%)
8.1% of homes are flats (typical compared French town: 30%). Couples with children make up about one in three here (33%). On households in social housing, Biol sits lower than just over three quarters of compared French towns: 7%. At the 2023 Census, 1,594 people lived in the town, in 640 households.
Throughout this page, the Isère 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.
Since 2012, Biol has grown +13%, faster than 77% 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
Against +5% for the median compared French town and +7% for the median Isère town, the change came in two steps: +1% from 2012 to 2017, then +12% to 2023.
Younger than 75% of compared French towns: half of Biol is under 40.7
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Biol 40.7. The median compared French town: 44.
The share of residents aged 15 to 24 trails 78% of compared French towns: 9.2%. Roughly two in ten: nearly a fifth of residents are 65 or over.
Women and men · all residents
51% women, 49% men
About an even split. Median share of women: Isère 51.3%, France 51.8%.
In Biol, 25% of households are one person living alone, fewer than in 94% of compared French towns
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 Isère median and the France median
Living alone · share
Each household has 2.4 people on average. As a reference point, 35% of households are one person living alone in the typical compared French town. One in ten households are single parents, a higher share than in 51% of compared French towns.
3.9% of homes in Biol are second homes
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
Nearly a quarter of households have been in place 30 years or more; 6.2% moved in within the last two years. Lower than in just over half of compared French towns: 6.6% of homes stand empty. In the typical compared French town, second homes come to 2.1%.
Half above, half below €26,960 a year in standard of living
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.
Per consumption unit, half of residents live on more than €26,960 a year: higher than in 61% of compared French towns.
31% of households are headed by a retired person, fewer than in 60% 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
The share of households headed by a manager or professional stands at 10%. Few places have as many households headed by a manual worker: 14% here, more than in 53% of compared French towns. In the typical compared French town, nearly a third of households are headed by a retired person.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
3.3% of residents are immigrants, fewer than in 79% of compared French towns
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.
Foreign nationals: 1.9%, below just over four fifths of compared French towns. The usual figure: 6.5% of residents are immigrants 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.
Fewer single residents than 86% of compared French towns: 21%
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
Married residents: 47% here and 43% in the typical compared French town. Against that, a quarter of residents 15 and over are single in the typical compared French town.
13% of adults out of school have no qualification, below 86% 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
The share of graduates of higher education stands at 31%. Measured more widely, nearly a fifth of adults out of school have no qualification in the typical compared French town.
The 4th youngest of 41 French towns of 1,594 to 2,582 people
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).
Among its 6 nearest neighbors, 5 are older than Biol
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Biol | 40.7 | 19% | 3.9% | 3.3% |
| Cessieu 3,259 · 5.1 mi | 40.2 | 16% | 1.9% | 4.8% |
| Nivolas-Vermelle 2,706 · 5.9 mi | 42.1 | 19% | 2.1% | 6.3% |
| La Tour-du-Pin 8,111 · 6.2 mi | 42 | 22% | 1.7% | 17% |
| Ruy-Montceau 4,805 · 6.8 mi | 47.1 | 22% | 1.1% | 5.1% |
| Le Grand-Lemps 3,083 · 7.1 mi | 44.2 | 21% | 2.6% | 8.3% |
| Saint-Clair-de-la-Tour 3,628 · 7.3 mi | 42.5 | 19% | 1.9% | 7.9% |
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 Biol
What is the population of Biol?
1,594 at INSEE’s 2023 census, 13% more than in 2012 (1,410).
How old are Biol’s residents?
The median age is 40.7, younger than 75% of compared French towns. 26% are under 18 and 19% 65 or older.
How many second homes are there in Biol?
28, with occasional dwellings: 3.9% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Biol?
INSEE counts 52 immigrants (born abroad, not French at birth), 3.3% of residents, and 30 foreign nationals (1.9%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Biol?
€26,960 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 November 4, 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.