Above 97% of compared French towns: 30% of households are headed by a manager or professional
20% of households rent social housing (HLM); in the typical compared French town the figure is 12%. Census day 2023: 5,847 residents and 2,460 households in Chambourcy. The share of flats stands at 62%. Residents aged 65 and over are rarer here than in two thirds of compared French towns.
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 Chambourcy
Many graduates
59% of residents 15 and over who have left education hold a diploma above the bac, 31% a master’s or more (bac+5). Qualifications ↓
Immigrants
INSEE counts 1,000 immigrants in Chambourcy (people born abroad who weren’t French at birth, whatever their nationality now): 16% of residents, against 15% for the median compared commune in Yvelines. 12% are foreign nationals. Immigrants and foreign nationals ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A change of ±0% since 2012 leaves Chambourcy behind 70% 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
In two steps, −4% to 2017 and +4% after, the town’s change compares with +5% for the median compared French town and +7% in Yvelines.
12% of residents are 15 to 24, a share 80% of compared French towns don’t reach
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Chambourcy 44.4. The median compared French town: 44.
With a median age of 44.4, Chambourcy is older than 52% of compared French towns. The usual figure: 11% of residents are 15 to 24 in the typical compared French town.
Women and men · all residents
53% women, 47% men
About 90 men for every 100 women. Median share of women: Yvelines 51.6%, France 51.8%.
30% of households are couples with children, a share 78% of compared French towns don’t reach
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
Here 31% of households are one person living alone, where the figure in the typical compared French town is 35%. Single-parent households are more common here than in 73% of compared French towns. Couples with children make up 25% in the typical compared French town. On average, 2.3 people share a household.
9.1% of households have no car, below 59% 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
One household in 11 has no car (median compared French town: 11%). Second homes account for 1.8%.
Standard of living at the median: €36,350 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.
At €36,350 a year per consumption unit, the median standard of living here is higher than in 96% of compared French towns. 8.0% of the population lives below the poverty line.
A smaller share of households headed by a manual worker than 99% of compared French towns: 2.9%
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
With households headed by a retired person at 28%, Chambourcy is behind 75% of compared French towns on that count. For households headed by a manual worker, the comparison in the typical compared French town is 14%.
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.
Just over one in ten residents are foreign nationals, against 4.3% in the typical compared French town. In the typical compared French town, 6.5% of residents are immigrants.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Married residents make up 49% in Chambourcy, more than in 87% 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
Single residents make up about one in four here (25%). Married residents: 43% in the typical compared French town, for comparison.
Chambourcy sits above 97% of compared French towns for graduates of higher education (59%)
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
9.8% of adults out of school have no qualification; in the typical compared French town the figure is 19%. The share of graduates of higher education in the typical compared French town is 30%.
19th lowest median age among 41 French towns of 5,809 to 5,882
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 Viry (35.9), the oldest Montmorillon (57.4).
Median age: 1 of the 6 towns around Chambourcy 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 |
|---|---|---|---|---|
| Chambourcy | 44.4 | 20% | 1.8% | 16% |
| Poissy 40,983 · 1.6 mi | 36.6 | 17% | 1.3% | 25% |
| Saint-Germain-en-Laye 45,931 · 1.8 mi | 41.3 | 18% | 4.2% | 19% |
| Mareil-Marly 4,141 · 2.3 mi | 43.2 | 16% | 3.1% | 15% |
| L'Étang-la-Ville 5,157 · 2.6 mi | 45.2 | 19% | 1.6% | 14% |
| Carrières-sous-Poissy 20,825 · 2.8 mi | 32.6 | 9.1% | 1.9% | 27% |
| Le Pecq 16,059 · 2.9 mi | 42.5 | 19% | 1.1% | 17% |
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 Chambourcy
What is the population of Chambourcy?
5,847 at INSEE’s 2023 census, about the same as in 2012 (5,857).
How old are Chambourcy’s residents?
The median age is 44.4, older than 52% of compared French towns. 24% are under 18 and 20% 65 or older.
How many second homes are there in Chambourcy?
47, with occasional dwellings: 1.8% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Chambourcy?
INSEE counts 960 immigrants (born abroad, not French at birth), 16% of residents, and 710 foreign nationals (12%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Chambourcy?
€36,350 a year per consumption unit in 2023 (median of compared French towns €25,970); 8.0% of residents live below the poverty line. 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 9, 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.