Photo: P.poschadel · CC BY-SA 3.0A higher share of couples with children than 96% of compared French towns, at 37%
Against a figure of 6.7% in the typical compared French town, the share of empty homes in Montsoult comes in at 4.5%. The town is home to 4,023 residents in 1,580 households, by the 2023 Census. Here, 16% of households are headed by a manager or professional. Half of the town’s residents are under 40.8, younger than in 74% of compared French towns.
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 Montsoult
A town of families
37% of households are couples with children and 8.6% single parents with children; 21% of residents are under 15. Households ↓
Growing fast
Montsoult had 3,396 residents at the 2012 census and 4,023 in 2023, up 18%: faster growth than in 88% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Since 2012, Montsoult has grown +18%, faster than 88% 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
Over the whole period the median compared French town changed +5%, and the median Val-d'Oise town +8%. The years 2012 to 2017 brought +3%; 2017 to 2023, +16%.
In Montsoult, 18% of residents are 65 or over, fewer than in 75% 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
■ Montsoult 40.8. The median compared French town: 44.
Locally, 10% of residents are 15 to 24. As a yardstick, 22% of residents are 65 or over in the typical compared French town.
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%.
A smaller share of one-person households than 79% of compared French towns: 29%
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
Households average 2.5 people. The share of one-person households in the typical compared French town is 35%. 8.6% of households are single parents, a lower share than in 72% of compared French towns.
Montsoult ranks below 84% of compared French towns on second homes: 0.9%
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 12 has no car, against 11% in the median compared French town. Lower than in 63% of compared French towns: 8.4% of households have no car. As a reference point, 2.1% of homes are second homes in the typical compared French town. Recent arrivals (under two years) make up 6.2% of households; long-stayers (30 years or more) 21%.
Median standard of living: €31,730 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 €31,730 a year per consumption unit, the median standard of living here is higher than in 91% of compared French towns. 7.0% of the population lives below the poverty line.
29% of households are headed by a retired person, below 71% 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
By its share of households headed by a manual worker (11%), Montsoult is below just over two thirds of compared French towns. In the typical compared French town, the share of households headed by a retired person is 32%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Montsoult sits above 78% of compared French towns for immigrants (12%)
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 (7.8%), Montsoult is above 73% of compared French towns. For comparison, 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.
A larger share of married residents than 65% of compared French towns: 45%
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 make up about one in four here (26%). Married residents make up 43% in the typical compared French town.
More graduates of higher education than 84% of compared French towns: 43%
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 Montsoult, 13% of adults out of school have no qualification, beside 19% in the typical compared French town. Set beside that, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
41 French towns of 3,996 to 4,050 people: this is the 6th 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.
At the ends of the range sit Fay-de-Bretagne (36.3), the youngest, and Vaux-sur-Mer (66.9), the oldest.
Older than Montsoult: 1 of the 6 towns nearby
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Montsoult | 40.8 | 18% | 0.9% | 12% |
| Bouffémont 6,593 · 1.8 mi | 39.3 | 15% | 0.5% | 16% |
| Domont 16,065 · 2.8 mi | 38 | 15% | 1.1% | 17% |
| Saint-Martin-du-Tertre 2,689 · 2.9 mi | 38.8 | 16% | 0.9% | 7% |
| Ézanville 9,858 · 3.2 mi | 39.2 | 17% | 1.1% | 15% |
| Presles 4,017 · 3.2 mi | 44.3 | 19% | 1.1% | 8.2% |
| Écouen 7,202 · 4.2 mi | 39 | 14% | 0.5% | 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 Montsoult
What is the population of Montsoult?
4,023 at INSEE’s 2023 census, 18% more than in 2012 (3,396).
How old are Montsoult’s residents?
The median age is 40.8, younger than 74% of compared French towns. 24% are under 18 and 18% 65 or older.
How many second homes are there in Montsoult?
15, with occasional dwellings: 0.9% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Montsoult?
INSEE counts 480 immigrants (born abroad, not French at birth), 12% of residents, and 310 foreign nationals (7.8%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Montsoult?
€31,730 a year per consumption unit in 2023 (median of compared French towns €25,970); 7.0% 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.