Photo: Joe Mabel · CC BY 3.0Half of Le Plessis-Belleville is under 37.2, younger than 91% of compared French towns
Set against 25% in the typical compared French town, 30% of households are couples with children in Le Plessis-Belleville. The town is home to 4,009 residents in 1,750 households, by the 2023 Census. Here, 18% of households rent social housing (HLM). Lower than in 72% of compared French towns: 29% of households are headed by a retired person.
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.
What stands out about the people of Le Plessis-Belleville
A young town
Half of Le Plessis-Belleville’s residents are under 37.2 and half over; the median of compared French towns is 44. 21% are under 15 and 14% are 65 or older. Ages ↓
Growing fast
Le Plessis-Belleville had 3,303 residents at the 2012 census and 4,009 in 2023, up 21%: faster growth than in 92% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A +21% change since 2012: faster than 92% 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, +3% to 2017 and +18% after, the town’s change compares with +5% for the median compared French town and +2% in Oise.
In Le Plessis-Belleville, 14% of residents are 65 or over, fewer than in 93% 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
■ Le Plessis-Belleville 37.2. The median compared French town: 44.
At 11%, residents aged 15 to 24 sit close to the figure in the typical compared French town. As a reference point, 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
52% women, 48% men
About 92 men for every 100 women. Median share of women: Oise 51.7%, France 51.8%.
37% of households are one person living alone, a share 57% of compared French towns don’t reach
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
Each household has 2.3 people on average. Few places have so few single-parent households: 9.6% here, fewer than in 57% of compared French towns. Against that, just over a third of households are one person living alone in the typical compared French town.
A larger share of flats than 74% of compared French towns: 50%
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
Without a car: one household in 12, against 11% in the median compared French town. Nearly one in ten households have no car, a lower share than in 62% of compared French towns. Flats: 30% in the typical compared French town, for comparison. In Le Plessis-Belleville, 0.9% of homes are second homes.
Half of residents have a standard of living above €27,400 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.
Half of residents live in households above €27,400 a year per consumption unit and half below; the level is higher than in 65% of compared French towns. Living below the poverty line: 8.0% of residents.
Le Plessis-Belleville: 17% of households are headed by a manual worker, above 69% 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 Le Plessis-Belleville, 10% of households are headed by a manager or professional. As a yardstick, 14% of households are headed by a manual worker in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Le Plessis-Belleville sits above 81% of compared French towns for immigrants (13%)
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.
In the typical compared French town, the share of foreign nationals is 4.3%; Le Plessis-Belleville has 8.4%. The comparison figure for immigrants is 6.5% in the typical compared French town. The median compared commune in Oise has 7.4%; immigrants here make up a share higher than in 81% 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.
In Le Plessis-Belleville, 31% of residents 15 and over are single, more than in 81% 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
Here nearly two in five residents 15 and over are married, where the figure in the typical compared French town is 43%. In the typical compared French town, the share of single residents is 25%.
Below 58% of compared French towns: 18% of adults out of school have no qualification
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
Compared with other places, graduates of higher education are common here: 31%, more than in 54% of compared French towns. As a reference point, nearly a fifth of adults out of school have no qualification in the typical compared French town.
2nd lowest median age among 41 French towns of 3,986 to 4,031
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 Fay-de-Bretagne (36.3), the oldest Vaux-sur-Mer (66.9).
Older than Le Plessis-Belleville: 4 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 |
|---|---|---|---|---|
| Le Plessis-Belleville | 37.2 | 14% | 0.9% | 13% |
| Saint-Pathus 6,479 · 2.3 mi | 37.4 | 12% | 0.8% | 7.5% |
| Nanteuil-le-Haudouin 4,258 · 3.7 mi | 37.1 | 13% | 1% | 7.4% |
| Othis 6,717 · 4.2 mi | 39.5 | 14% | 0.7% | 8.6% |
| Dammartin-en-Goële 11,907 · 4.4 mi | 34.8 | 10% | 0.9% | 12% |
| Saint-Soupplets 3,542 · 4.7 mi | 39.3 | 17% | 1.6% | 8.5% |
| Saint-Mard 3,832 · 4.9 mi | 38.8 | 14% | 0.7% | 9.3% |
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 Le Plessis-Belleville
What is the population of Le Plessis-Belleville?
4,009 at INSEE’s 2023 census, 21% more than in 2012 (3,303).
How old are Le Plessis-Belleville’s residents?
The median age is 37.2, younger than 91% of compared French towns. 25% are under 18 and 14% 65 or older.
How many second homes are there in Le Plessis-Belleville?
17, with occasional dwellings: 0.9% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Le Plessis-Belleville?
INSEE counts 510 immigrants (born abroad, not French at birth), 13% of residents, and 340 foreign nationals (8.4%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Le Plessis-Belleville?
€27,400 a year per consumption unit in 2023 (median of compared French towns €25,970); 8.0% 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.