Photo: Pierre Poschadel · CC BY-SA 4.0Chaumont-en-Vexin: 13% of households are single parents, above 89% of compared French towns
Here 19% of households rent social housing (HLM), where the figure in the typical compared French town is 12%. Residents aged 65 and over make up about one in four here (25%). Half are older than 44.2, older than just over half of compared French towns. Census day 2023: 3,338 residents and 1,360 households in Chaumont-en-Vexin.
Throughout this page, the Oise 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.
A +7% change since 2012: Chaumont-en-Vexin grew faster than 60% 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 first five years brought +5%; the six to 2023, +2%.
Older than 51% of compared French towns: half of Chaumont-en-Vexin is over 44.2
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Chaumont-en-Vexin 44.2. The median compared French town: 44.
Residents aged 15 to 24 are about as common here as in the typical compared French town, at 11%.
Women and men · all residents
54% women, 46% men
About 87 men for every 100 women. Median share of women: Oise 51.7%, France 51.8%.
Couples with children make up 28% in Chaumont-en-Vexin, more than in 66% 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 Oise median and the France median
Living alone · share
37% of households are one person living alone; in the typical compared French town the figure is 35%. Against that, a quarter of households are couples with children in the typical compared French town. On average, 2.2 people share a household.
In Chaumont-en-Vexin, 13% of households have no car, more than in 62% 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 eight has no car, against 11% in the median compared French town. At 3.4%, the share of second homes is higher than in nearly two thirds of compared French towns. On the census count, 31% of homes are flats.
At the median, €25,740 a year to live on
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 Chaumont-en-Vexin’s residents live in households with a standard of living below €25,740 a year per consumption unit, and half above: lower than in 52% of compared French towns. Living below the poverty line: 10.0% of residents.
Households headed by a retired person make up 31% in Chaumont-en-Vexin, less than in 61% of compared French towns
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
Locally, 13% of households are headed by a manual worker. Nearly a tenth of Chaumont-en-Vexin’s households are headed by a manager or professional, against 9.4% in the median compared French town; 31% by a retired person (32%).
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
In Chaumont-en-Vexin, 7.5% of residents are immigrants, more than in 57% 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 median compared commune in Oise has 7.4%; immigrants here make up a share higher than in 57% of compared French towns. On average, 6.5% of residents are immigrants in the typical compared French town. Across Chaumont-en-Vexin, 4.8% of residents are foreign nationals.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Chaumont-en-Vexin ranks below 89% of compared French towns on married residents: 35%
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 25% in the typical compared French town, 28% of residents 15 and over are single here. Married residents make up 43% in the typical compared French town.
Chaumont-en-Vexin ranks above 75% of compared French towns on adults with no qualification: 24%
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
In the typical compared French town, 30% of adults out of school hold a higher-education qualification; in Chaumont-en-Vexin, 26%. Typically, 19% of adults out of school have no qualification in the typical compared French town.
Among 41 French towns of 3,308 to 3,369 people, the 17th youngest
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
Saint-Maximin is the youngest (36.4); Roscoff the oldest (61.5).
Chaumont-en-Vexin is older than every town around it
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Chaumont-en-Vexin | 44.2 | 25% | 3.4% | 7.5% |
| Gisors 12,410 · 5 mi | 43.3 | 22% | 2.3% | 9.2% |
| Sérifontaine 2,784 · 7.8 mi | 42.7 | 20% | 1.4% | 5% |
| Auneuil 2,898 · 8.7 mi | 43.3 | 20% | 2.2% | 3.8% |
| Magny-en-Vexin 5,779 · 8.8 mi | 41.6 | 18% | 1.5% | 11% |
| Marines 3,594 · 9.4 mi | 39.7 | 17% | 1.9% | 6.4% |
| Méru 13,897 · 11.3 mi | 36.7 | 15% | 0.7% | 19% |
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 Chaumont-en-Vexin
What is the population of Chaumont-en-Vexin?
3,338 at INSEE’s 2023 census, 7% more than in 2012 (3,112).
How old are Chaumont-en-Vexin’s residents?
The median age is 44.2, older than 51% of compared French towns. 22% are under 18 and 25% 65 or older.
How many second homes are there in Chaumont-en-Vexin?
52, with occasional dwellings: 3.4% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Chaumont-en-Vexin?
INSEE counts 250 immigrants (born abroad, not French at birth), 7.5% of residents, and 160 foreign nationals (4.8%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Chaumont-en-Vexin?
€25,740 a year per consumption unit in 2023 (median of compared French towns €25,970); 10.0% 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 8, 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.