Households headed by a manager or professional: 38%, a higher share than 99% of compared French towns
In the typical compared French town, 30% of homes are flats; in Châtillon, 85%. This Hauts-de-Seine town counted 36,705 residents and 17,370 households at the 2023 Census. For Châtillon, the census puts residents aged 65 and over at 16%. A third of households have no car, a higher share than in 97% of compared French towns.
Throughout this page, the Hauts-de-Seine 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 Châtillon
Immigrants
INSEE counts 6,300 immigrants in Châtillon (people born abroad who weren’t French at birth, whatever their nationality now): 17% of residents, against 18% for the median compared commune in Hauts-de-Seine. 11% are foreign nationals. Immigrants and foreign nationals ↓
Many graduates
59% of residents 15 and over who have left education hold a diploma above the bac, 34% a master’s or more (bac+5). Qualifications ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Since 2012, Châtillon has grown +5%, faster than 51% 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
Between 2012 and 2017 the population moved +7%, then −2% to 2023. Over those years, the median Hauts-de-Seine town changed +4% and the median compared French town +5%.
A median age of 38.9: Châtillon is younger than 85% 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
■ Châtillon 38.9. The median compared French town: 44.
Residents aged 15 to 24 make up 12%, against 11% in the typical compared French town.
Women and men · all residents
52% women, 48% men
About 91 men for every 100 women. Median share of women: Hauts-de-Seine 52.4%, France 51.8%.
44% of households are one person living alone, more than in 82% 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 Hauts-de-Seine median and the France median
Living alone · share
In the typical compared French town, a quarter of households are couples with children; in Châtillon, 24%. By way of comparison, just over a third of households are one person living alone in the typical compared French town. On average, 2.1 people share a household. 9.4% of households are single parents, a lower share than in 60% of compared French towns.
Above 69% of compared French towns: 17% of households rent social housing (HLM)
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
The share of empty homes trails 73% of compared French towns: 5.1%. For comparison, 12% of households rent social housing (HLM) in the typical compared French town. On the census count, 2.9% of homes are second homes.
€34,590 a year: the median 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.
Half of residents live in households above €34,590 a year per consumption unit and half below; the level is higher than in 95% of compared French towns. Living below the poverty line: 10.4% of residents.
Châtillon ranks below 93% of compared French towns on households headed by a retired person: 21%
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
In the typical compared French town, 14% of households are headed by a manual worker; in Châtillon, 4.7%. The benchmark for households headed by a retired person in the typical compared French town: 32%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
17% of residents are immigrants, more than in 89% 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.
The share of foreign nationals is 11%, against 4.3% in the typical compared French town. Immigrants make up 6.5% 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.
Châtillon sits above 89% of compared French towns for single residents (33%)
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
Against a figure of 43% in the typical compared French town, the share of married residents in Châtillon comes in at 37%. On average, 25% of residents 15 and over are single in the typical compared French town.
A larger share of graduates of higher education than 97% of compared French towns: 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
Adults with no qualification: 11%, below 93% of compared French towns. The benchmark for graduates of higher education in the typical compared French town: 30%.
Of 41 French towns its size (34,752 to 38,604 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 Saint-Martin-d'Hères (29.9), the oldest Saint-Raphaël (58.9).
Châtillon is younger than 4 of its 6 nearest neighbors
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
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 Châtillon
What is the population of Châtillon?
36,705 at INSEE’s 2023 census, 5% more than in 2012 (34,960).
How old are Châtillon’s residents?
The median age is 38.9, younger than 85% of compared French towns. 20% are under 18 and 16% 65 or older.
How many second homes are there in Châtillon?
540, with occasional dwellings: 2.9% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Châtillon?
INSEE counts 6,340 immigrants (born abroad, not French at birth), 17% of residents, and 4,130 foreign nationals (11%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Châtillon?
€34,590 a year per consumption unit in 2023 (median of compared French towns €25,970); 10.4% 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.