Chavenay sits above 99% of compared French towns for households headed by a manager or professional (39%)
With a median age of 49.1, Chavenay is older than four fifths of compared French towns. Its 690 households held 1,723 residents at the 2023 Census. In Chavenay, 3.5% of households have no car. Compared with 35% in the typical compared French town, 21% of households are one person living alone here.
Throughout this page, the Yvelines 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 Chavenay
Many graduates
68% of residents 15 and over who have left education hold a diploma above the bac, 36% a master’s or more (bac+5). Qualifications ↓
Fewer residents than in 2012
Chavenay had 1,878 residents at the 2012 census and 1,723 in 2023, down 8%: slower growth than in 95% of compared French towns. Population ↓
A town of families
34% of households are couples with children and 8.8% single parents with children; 16% of residents are under 15. Households ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A change of −8% since 2012 leaves Chavenay behind 95% 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
From 2012 to 2017 the change was −3%; from 2017 to 2023, −5%.
Chavenay: 13% of residents are 15 to 24, above 87% 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
■ Chavenay 49.1. The median compared French town: 44.
Residents aged 65 and over account for 22%. As a reference point, 11% of residents are 15 to 24 in the typical compared French town.
Women and men · all residents
51% women, 49% men
About an even split. Median share of women: Yvelines 51.6%, France 51.8%.
A higher share of couples with children than 91% of compared French towns, at 34%
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 Yvelines median and the France median
Living alone · share
In Chavenay, nearly one in ten households are single parents, beside 10% in the typical compared French town. The comparison figure for couples with children is 25% in the typical compared French town. There are 2.5 people in the average household.
A smaller share of flats than 92% of compared French towns: 7.1%
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
Households in social housing are rarer here than in 99% of compared French towns. Flats make up 30% in the typical compared French town. The census found that 1.1% of homes are second homes in Chavenay. Empty homes make up 5.9%, close to the figure in the typical compared French town.
A median standard of living of €47,470 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.
The median standard of living in Chavenay is €47,470 a year per consumption unit: higher than in 99% of compared French towns.
A lower share of households headed by a manual worker than 99% of compared French towns, at 1.6%
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
Here, 32% of households are headed by a retired person. For comparison, 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).
Chavenay sits above 73% of compared French towns for immigrants (11%)
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.
With foreign nationals at 8.3%, Chavenay is ahead of 75% of compared French towns on that count. Elsewhere, 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.
Chavenay sits above 99% of compared French towns for married residents (59%)
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
Just over a fifth of residents 15 and over are single, against 25% in the typical compared French town. In the typical compared French town, married residents come to 43%.
Graduates of higher education make up 68% in Chavenay, more 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
Adults with no qualification: 6.2% here and 19% in the typical compared French town. On average, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
Among 41 French towns of 1,723 to 2,582 people, the 15th 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).
No nearby town is as old as Chavenay
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Chavenay | 49.1 | 22% | 1.1% | 11% |
| Saint-Nom-la-Bretèche 4,965 · 1.5 mi | 47.3 | 23% | 3.6% | 13% |
| Feucherolles 3,043 · 1.5 mi | 45.5 | 19% | 2.5% | 8.1% |
| Villepreux 11,931 · 1.9 mi | 39.2 | 15% | 0.8% | 12% |
| Les Clayes-sous-Bois 16,804 · 2.1 mi | 41.9 | 19% | 2.2% | 17% |
| Plaisir 31,811 · 2.8 mi | 37.9 | 15% | 1.3% | 19% |
| Noisy-le-Roi 7,713 · 3.5 mi | 48.4 | 26% | 1.8% | 11% |
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 Chavenay
What is the population of Chavenay?
1,723 at INSEE’s 2023 census, 8% fewer than in 2012 (1,878).
How old are Chavenay’s residents?
The median age is 49.1, older than 80% of compared French towns. 22% are under 18 and 22% 65 or older.
How many second homes are there in Chavenay?
8, with occasional dwellings: 1.1% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Chavenay?
INSEE counts 180 immigrants (born abroad, not French at birth), 11% of residents, and 140 foreign nationals (8.3%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Chavenay?
€47,470 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.