Couples with children: 37%, a higher share than 96% of compared French towns
In the typical compared French town, 11% of households have no car; in Bilieu, 1.5%. The 2023 Census counted 1,578 residents in 630 households. Households headed by a manager or professional: just over a fifth of the total. Lower than in 83% of compared French towns: 5.7% of households rent social housing (HLM).
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.
What stands out about the people of Bilieu
One home in seven is a second home
The census counted 110 second homes and occasional dwellings in Bilieu, 14% of its 770 homes: higher than in 91% of compared French towns. 97% of them are houses. Their owners live elsewhere, so they aren’t in the population figures on this page. Homes & cars ↓
A town of families
37% of households are couples with children and 4% single parents with children; 20% of residents are under 15. Households ↓
Many graduates
47% of residents 15 and over who have left education hold a diploma above the bac, 17% a master’s or more (bac+5). Qualifications ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Bilieu: 14% of homes are second homes, above 91% of compared French towns
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
In the typical compared French town, 30% of homes are flats; in Bilieu, 7.4%. Here, 4.1% of homes stand empty. Against that, 2.1% of homes are second homes in the typical compared French town.
Bilieu grew +16% from 2012 to 2023, faster than 84% 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
The median Isère town changed +7% and the median compared French town +5%; here the first five years brought +14% and the next six +2%.
Residents aged 15 to 24 make up 9.3% in Bilieu, less than in 76% 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
■ Bilieu 45.5. The median compared French town: 44.
A fifth of residents are 65 or over; in the typical compared French town the figure is 22%. By contrast, with a median age of 45.5, Bilieu is older than three fifths of compared French towns. Set beside that, 11% of residents are 15 to 24 in the typical compared French town.
Women and men · all residents
52% women, 48% men
About 93 men for every 100 women. Median share of women: Isère 51.3%, France 51.8%.
22% of households are one person living alone, fewer than in 98% 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
Households here average 2.5 people each. One-person households: 35% in the typical compared French town, for comparison. Single-parent households are rarer here than in 99% of compared French towns.
Half of residents have a standard of living above €29,050 a year
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 €29,050 a year per consumption unit and half below; the level is higher than in 79% of compared French towns.
Fewer households headed by a manual worker than 85% of compared French towns: 8.4%
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
30% of households are headed by a retired person; in the typical compared French town the figure is 32%. Set beside that, 14% of households are headed by a manual worker in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
In Bilieu, 1.9% of residents are foreign nationals, fewer than in 80% 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.
Immigrants make up a share lower than in 62% of compared French towns; the median compared commune in Isère has 8%. Put another way, about one in 20: 5.1% of residents are immigrants. In the typical compared French town, the share of foreign nationals is 4.3%.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
A smaller share of single residents than 98% of compared French towns: 18%
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
Compared with 43% in the typical compared French town, 52% of residents 15 and over are married here. Single residents make up 25% in the typical compared French town.
Below 93% of compared French towns: 11% of adults out of school have no qualification
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 is 47%, against 30% in the typical compared French town. Adults with no qualification make up 19% in the typical compared French town.
Of 41 French towns its size (1,578 to 2,582 people), the 21st 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.
The youngest is Villejust (37.2), the oldest Prayssac (62.3).
Median age: 2 of the 6 towns around Bilieu are older
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Bilieu | 45.5 | 20% | 14% | 5.1% |
| Villages du Lac de Paladru 2,598 · 1.7 mi | 45.8 | 21% | 15% | 3.5% |
| Chirens 2,546 · 2.1 mi | 42.6 | 20% | 2.9% | 5.8% |
| Apprieu 3,615 · 4.3 mi | 42.2 | 17% | 2% | 5.1% |
| Voiron 21,847 · 5.9 mi | 44.6 | 23% | 1.5% | 11% |
| Saint-Étienne-de-Crossey 2,619 · 6.3 mi | 47.4 | 23% | 2.4% | 3.3% |
| Les Abrets en Dauphiné 6,850 · 6.4 mi | 43.9 | 23% | 2.1% | 5.6% |
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 Bilieu
What is the population of Bilieu?
1,578 at INSEE’s 2023 census, 16% more than in 2012 (1,359).
How old are Bilieu’s residents?
The median age is 45.5, older than 60% of compared French towns. 25% are under 18 and 20% 65 or older.
How many second homes are there in Bilieu?
110, with occasional dwellings: 14% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Bilieu?
INSEE counts 81 immigrants (born abroad, not French at birth), 5.1% 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 Bilieu?
€29,050 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.