More couples with children than 97% of compared French towns: 38%
With households without a car at 2.6%, Seraincourt is behind 99% of compared French towns on that count. The town had 1,305 residents in 540 households at the 2023 Census. On the census count, 0.3% of households rent social housing (HLM). Higher than in 93% of compared French towns: 24% of households are headed by a manager or professional.
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 Seraincourt
A town of families
38% of households are couples with children and 5.4% single parents with children; 18% of residents are under 15. Households ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A −1% change since 2012: slower than 72% 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 compared French town changed +5% over the same years, the median Val-d'Oise town +8%.
A smaller share of residents aged 65 and over than 77% of compared French towns: 18%
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Seraincourt 43.6. The median compared French town: 44.
With a median age of 43.6, Seraincourt is younger than 53% of compared French towns. Just over one in ten residents are 15 to 24. Elsewhere, 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
49% women, 51% men
About an even split. Median share of women: Val-d'Oise 51.5%, France 51.8%.
Seraincourt sits below 98% of compared French towns for single-parent households (5.4%)
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
Against a figure of 35% in the typical compared French town, the share of one-person households in Seraincourt comes in at 27%. Households here average 2.4 people each. In the typical compared French town, the share of single-parent households is 10%.
Fewer flats than 80% of compared French towns: 14%
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
Little separates the share of second homes here, 1.4%, from the figure in the typical compared French town. By way of comparison, 30% of homes are flats in the typical compared French town. About one in 11: that is how common empty homes are in Seraincourt (8.7%).
The middle resident’s standard of living: €32,650 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 Seraincourt is €32,650 a year per consumption unit: higher than in 92% of compared French towns.
In Seraincourt, 23% of households are headed by a retired person, fewer than in 90% 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
14% of households are headed by a manual worker in the typical compared French town, against 9.2% in Seraincourt. As a reference point, 32% of households are headed by a retired person in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
7% of residents in Seraincourt are immigrants
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.
Immigrants make up a share higher than in 54% of compared French towns; the median compared commune in Val-d'Oise has 16%. About one in 14: that is how common immigrants are in Seraincourt (7%). At 4.5%, foreign nationals sit close to the figure 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.
Below 56% of compared French towns: 42% of residents 15 and over are married
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
Across Seraincourt, 25% of residents 15 and over are single. The comparison figure for married residents is 43% in the typical compared French town.
11% of adults out of school have no qualification, fewer than in 91% 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
Graduates of higher education: 44% here and 30% in the typical compared French town. In the typical compared French town, the share of adults with no qualification is 19%.
15th lowest median age among 41 French towns of 1,305 to 2,582
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
At the ends of the range sit Villejust (37.2), the youngest, and Prayssac (62.3), the oldest.
Seraincourt 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 |
|---|---|---|---|---|
| Seraincourt | 43.6 | 18% | 1.4% | 7% |
| Hardricourt 2,599 · 2.4 mi | 38.7 | 16% | 3.7% | 15% |
| Meulan-en-Yvelines 8,950 · 2.8 mi | 38.3 | 16% | 1% | 20% |
| Juziers 4,065 · 3.3 mi | 39.8 | 17% | 12% | 12% |
| Les Mureaux 34,632 · 4 mi | 34.3 | 14% | 0.8% | 34% |
| Gargenville 7,869 · 4.5 mi | 39.6 | 18% | 0.8% | 13% |
| Vaux-sur-Seine 5,202 · 4.8 mi | 40.3 | 16% | 3.2% | 14% |
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 Seraincourt
What is the population of Seraincourt?
1,305 at INSEE’s 2023 census, about the same as in 2012 (1,312).
How old are Seraincourt’s residents?
The median age is 43.6, younger than 53% of compared French towns. 22% are under 18 and 18% 65 or older.
How many second homes are there in Seraincourt?
9, with occasional dwellings: 1.4% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Seraincourt?
INSEE counts 92 immigrants (born abroad, not French at birth), 7% of residents, and 59 foreign nationals (4.5%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Seraincourt?
€32,650 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 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.