Above 99% of compared French towns: 41% of households are couples with children
Compared with 14% in the typical compared French town, 4.6% of households are headed by a manual worker here. About one in six: that is how common residents aged 65 and over are in Saint-Witz (16%). This Val-d'Oise town has fewer households without a car than 96% of compared French towns, at 3.7%. At the 2023 Census, 2,724 people lived here, in 1,030 households.
Throughout this page, the Val-d'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.
What stands out about the people of Saint-Witz
A town of families
41% of households are couples with children and 11% single parents with children; 21% of residents are under 15. Households ↓
Many graduates
56% of residents 15 and over who have left education hold a diploma above the bac, 22% a master’s or more (bac+5). Qualifications ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A +7% change since 2012: faster than 58% 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 median Val-d'Oise town changed +8% and the median compared French town +5%; here the first five years brought −7% and the next six +14%.
Half of Saint-Witz is under 40.9, younger than 74% 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
■ Saint-Witz 40.9. The median compared French town: 44.
Set against 11% in the typical compared French town, 13% of residents are 15 to 24 in Saint-Witz.
Women and men · all residents
51% women, 49% men
About 95 men for every 100 women. Median share of women: Val-d'Oise 51.5%, France 51.8%.
23% of households are one person living alone, fewer than in 97% 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 Val-d'Oise median and the France median
Living alone · share
The typical household size is 2.6 people. Across the comparison, 35% of households are one person living alone in the typical compared French town. Put another way, about one in nine: just over one in ten households are single parents.
A lower share of households in social housing than 75% of compared French towns, at 7.3%
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
Turnover: one in ten households moved in less than two years ago, and 16% have lived in their home 30 years or more. Compared with other places, flats are scarce here: 19%, fewer than in 70% of compared French towns. As a reference point, 12% of households rent social housing (HLM) in the typical compared French town. Where 2.1% of homes are second homes in the typical compared French town, Saint-Witz has 0.9%.
The middle resident’s standard of living: €36,470 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.
At €36,470 a year per consumption unit, the median standard of living here is higher than in 96% of compared French towns. Below the poverty line: 5.0% of residents.
30% of households are headed by a manager or professional, more than in 97% 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
In Saint-Witz, 23% of households are headed by a retired person, beside 32% in the typical compared French town. For households headed by a manager or professional, the comparison in the typical compared French town is 9.4%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
14% of residents are immigrants, a share 84% of compared French towns don’t reach
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.
By its share of foreign nationals (8.8%), Saint-Witz is above 78% of compared French towns. In the typical compared French town, the share of immigrants is 6.5%. The median compared commune in Val-d'Oise has 16%; immigrants here make up a share higher than in 84% of compared French towns.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Saint-Witz: 50% of residents 15 and over are married, above 93% 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: a quarter of the total. In the typical compared French town, 43% of residents 15 and over are married.
Fewer adults with no qualification than 99% of compared French towns: 6.8%
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
56% of Saint-Witz’s residents 15 and over who have left education hold a higher-education diploma, against 30% in the median compared French town; 6.8% have no diploma (19%).
9th lowest median age among 41 French towns of 2,689 to 2,761
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 Trieux (37.7), the oldest Bagnoles de l'Orne Normandie (61.9).
Every neighbor is younger than Saint-Witz
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Saint-Witz | 40.9 | 16% | 0.9% | 14% |
| Survilliers 4,091 · 1.3 mi | 35.6 | 13% | 1.2% | 14% |
| Vémars 3,124 · 1.5 mi | 35.8 | 12% | 1.9% | 13% |
| Moussy-le-Neuf 3,253 · 2.4 mi | 39.6 | 13% | 2.4% | 7.7% |
| Fosses 10,570 · 2.7 mi | 36.1 | 13% | 0.8% | 21% |
| Marly-la-Ville 6,022 · 2.9 mi | 38.6 | 15% | 1% | 12% |
| La Chapelle-en-Serval 3,084 · 2.9 mi | 38.2 | 12% | 1.9% | 8.6% |
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 Saint-Witz
What is the population of Saint-Witz?
2,724 at INSEE’s 2023 census, 7% more than in 2012 (2,552).
How old are Saint-Witz’s residents?
The median age is 40.9, younger than 74% of compared French towns. 26% are under 18 and 16% 65 or older.
How many second homes are there in Saint-Witz?
10, with occasional dwellings: 0.9% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Saint-Witz?
INSEE counts 390 immigrants (born abroad, not French at birth), 14% of residents, and 240 foreign nationals (8.8%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Saint-Witz?
€36,470 a year per consumption unit in 2023 (median of compared French towns €25,970); 5.0% 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 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.