Sérifontaine: 26% of households rent social housing (HLM), above 88% of compared French towns
With households headed by a manual worker at 21%, Sérifontaine is ahead of 87% of compared French towns on that count. Single-parent households come to 12% here, about one in ten. Households without a car are more common here than in 65% of compared French towns. The 2023 Census counted 2,784 residents in 1,250 households.
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.
−4% since 2012, a pace below 84% 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, −5% to 2017 and +1% after, the town’s change compares with +5% for the median compared French town and +2% in Oise.
Sérifontaine is younger than 61% of compared French towns: a median age of 42.7
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Sérifontaine 42.7. The median compared French town: 44.
Against a figure of 11% in the typical compared French town, the share of residents aged 15 to 24 in Sérifontaine comes in at 10%. Roughly two in ten: 20% of residents are 65 or over.
Women and men · all residents
53% women, 47% men
About 90 men for every 100 women. Median share of women: Oise 51.7%, France 51.8%.
A lower share of one-person households than 59% of compared French towns, at 33%
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
Households average 2.2 people. Compared with other places, couples with children are scarce here: 24%, fewer than in 55% of compared French towns. Set beside that, 35% of households are one person living alone in the typical compared French town.
25% of homes are flats, below 58% 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 seven has no car (median compared French town: 11%). As a yardstick, 30% of homes are flats in the typical compared French town. Locally, 1.4% of homes are second homes. Compared with other places, empty homes are common here: 7%, more than in 53% of compared French towns.
Per consumption unit, the median standard of living is €23,910 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 Sérifontaine is €23,910 a year per consumption unit: lower than in 72% of compared French towns. As for poverty, 18.0% of residents are below the line.
Households headed by a manager or professional: 6%, a lower share than 76% 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
Nearly a third of households are headed by a retired person in the typical compared French town, against 35% in Sérifontaine. The usual figure: nearly one in ten households are headed by a manager or professional in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
5% of residents are immigrants, below 63% 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.
For Sérifontaine, the census puts foreign nationals at 3.6%. To put it in context, 6.5% of residents are immigrants 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.
61% of residents 15 and over live as a couple
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
Here, 25% of residents 15 and over are single. Sérifontaine has fewer married residents than 53% of compared French towns, at 43%.
16% of adults out of school hold a higher-education qualification, below 95% 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
Against a figure of 19% in the typical compared French town, the share of adults with no qualification in Sérifontaine comes in at 30%.
6th lowest median age among 41 French towns of 2,758 to 2,810
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 La Fère (39.7), the youngest, and Argelès-Gazost (59.7), the oldest.
Nearby, 5 of 6 towns have older populations than Sérifontaine
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Sérifontaine | 42.7 | 20% | 1.4% | 5% |
| Gisors 12,410 · 5.1 mi | 43.3 | 22% | 2.3% | 9.2% |
| Étrépagny 3,670 · 7.8 mi | 47.8 | 24% | 1.5% | 5.2% |
| Chaumont-en-Vexin 3,338 · 7.8 mi | 44.2 | 25% | 3.4% | 7.5% |
| Gournay-en-Bray 5,723 · 9.3 mi | 51.9 | 31% | 1.4% | 4.4% |
| Auneuil 2,898 · 10 mi | 43.3 | 20% | 2.2% | 3.8% |
| Magny-en-Vexin 5,779 · 13.7 mi | 41.6 | 18% | 1.5% | 11% |
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 Sérifontaine
What is the population of Sérifontaine?
2,784 at INSEE’s 2023 census, 4% fewer than in 2012 (2,898).
How old are Sérifontaine’s residents?
The median age is 42.7, younger than 61% of compared French towns. 23% are under 18 and 20% 65 or older.
How many second homes are there in Sérifontaine?
19, with occasional dwellings: 1.4% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Sérifontaine?
INSEE counts 140 immigrants (born abroad, not French at birth), 5% of residents, and 99 foreign nationals (3.6%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Sérifontaine?
€23,910 a year per consumption unit in 2023 (median of compared French towns €25,970); 18.0% 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.