A higher share of couples with children than 97% of compared French towns, at 38%
Households in social housing are rarer here than in 99% of compared French towns. 24% of households are headed by a manager or professional. There were 260 households in Janvry at the 2023 Census, home to 654 residents. By its share of flats (8.1%), Janvry is below 90% of compared French towns.
Throughout this page, the Essonne 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 Janvry
A town of families
38% of households are couples with children and 9.2% single parents with children; 15% of residents are under 15. Households ↓
Many graduates
50% of residents 15 and over who have left education hold a diploma above the bac, 25% a master’s or more (bac+5). Qualifications ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Janvry grew +8% from 2012 to 2023, ahead of 64% 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 change was +5% from 2012 to 2017 and +3% from 2017 to 2023.
Above 87% of compared French towns: 13% of residents are 15 to 24
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Janvry 45.9. The median compared French town: 44.
The median age in Janvry is 45.9, higher than in 63% of compared French towns. To put it in context, 11% of residents are 15 to 24 in the typical compared French town. For Janvry, the census puts residents aged 65 and over at 21%.
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Essonne 51.3%, France 51.8%.
24% of households are one person living alone, below 96% 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 Essonne median and the France median
Living alone · share
Each household has 2.5 people on average. Set beside that, 35% of households are one person living alone in the typical compared French town. On single-parent households, Janvry sits lower than 63% of compared French towns: 9.2%.
Janvry sits below 92% of compared French towns for households without a car (4.4%)
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
On second homes, 1.6% here is much the same as in the typical compared French town. Few places have so few empty homes: 6.4% here, fewer than in 55% of compared French towns. In the typical compared French town, 11% of households have no car.
Half of residents have a standard of living above €37,040 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 Janvry’s residents live in households with a standard of living below €37,040 a year per consumption unit, and half above: higher than in 97% of compared French towns.
A lower share of households headed by a manual worker than 99% of compared French towns, at 3.7%
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 retired person is 37%, against 32% in the typical compared French town. As a yardstick, 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).
Janvry ranks above 61% of compared French towns on immigrants: 8.2%
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.
The median compared commune in Essonne has 13%; immigrants here make up a share higher than in just over three fifths of compared French towns. By way of comparison, 6.5% of residents are immigrants in the typical compared French town. About one in 21: that is how common foreign nationals are in Janvry (4.8%).
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
More married residents than 78% of compared French towns: 47%
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
By its share of single residents (24%), Janvry is below three fifths of compared French towns. To put it in context, 43% of residents 15 and over are married in the typical compared French town.
7.2% of adults out of school have no qualification, fewer than in 99% 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
Half of adults out of school hold a higher-education qualification (typical compared French town: 30%). As a yardstick, nearly a fifth of adults out of school have no qualification in the typical compared French town.
Ranked by age, 19th oldest of 41 French towns this size
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).
No nearby town is as old as Janvry
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Janvry | 45.9 | 21% | 1.6% | 8.2% |
| Briis-sous-Forges 3,342 · 1.8 mi | 44 | 19% | 1.4% | 7.4% |
| Gometz-le-Châtel 2,630 · 2.5 mi | 41.2 | 17% | 7.3% | 14% |
| Les Ulis 25,886 · 2.8 mi | 35.6 | 14% | 1.2% | 28% |
| Bures-sur-Yvette 9,548 · 3.3 mi | 45 | 23% | 1.8% | 13% |
| Forges-les-Bains 4,241 · 3.3 mi | 39.5 | 15% | 2.2% | 8.6% |
| Marcoussis 8,618 · 3.4 mi | 41.1 | 18% | 1.2% | 8% |
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 Janvry
What is the population of Janvry?
654 at INSEE’s 2023 census, 8% more than in 2012 (603).
How old are Janvry’s residents?
The median age is 45.9, older than 63% of compared French towns. 21% are under 18 and 21% 65 or older.
How many second homes are there in Janvry?
4, with occasional dwellings: 1.6% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Janvry?
INSEE counts 53 immigrants (born abroad, not French at birth), 8.2% of residents, and 32 foreign nationals (4.8%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Janvry?
€37,040 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.