Couples with children make up 32% in Breuil-le-Sec, more than in 85% of compared French towns
Flats: 11% here and 30% in the typical compared French town. At the 2023 Census Breuil-le-Sec was home to 2,467 people in 1,000 households. 0.8% of its homes are second homes; 3% of residents are immigrants. Compared with other places, residents aged 65 and over are scarce here: 20%, fewer than in nearly two thirds of compared French towns.
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.
Slower growth than 69% of compared French towns: Breuil-le-Sec changed by ±0% since 2012
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 change was +8% from 2012 to 2017 and −7% from 2017 to 2023. The median compared French town changed +5% over the same years, the median Oise town +2%.
Half of Breuil-le-Sec is under 42.6, younger than 62% 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
■ Breuil-le-Sec 42.6. The median compared French town: 44.
Residents aged 15 to 24 make up 11%, close to the figure in the typical compared French town.
Women and men · all residents
51% women, 49% men
About 96 men for every 100 women. Median share of women: Oise 51.7%, France 51.8%.
One-person households make up 28% in Breuil-le-Sec, less than in 86% 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 Oise median and the France median
Living alone · share
The average household has 2.4 people. In the typical compared French town, one-person households come to 35%. Few places have as many single-parent households: 10% here, more than in 52% of compared French towns.
Below 64% of compared French towns: 8.3% of households have no car
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
Here 5.1% of homes stand empty, where the figure in the typical compared French town is 6.7%. Put another way, about one in seven: 15% of households rent social housing (HLM). The wider picture: just over one in ten households have no car in the typical compared French town.
Standard of living at the median: €28,220 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 Breuil-le-Sec’s residents live in households with a standard of living below €28,220 a year per consumption unit, and half above: higher than in 73% of compared French towns. Living below the poverty line: 6.0% of residents.
Breuil-le-Sec: 34% of households are headed by a retired person, above 60% 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
13% of households are headed by a manual worker, or about one in eight. At 9.6%, the share of households headed by a manager or professional is higher than in 51% of compared French towns.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Below 82% of compared French towns: 3% of residents 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.
4.3% of residents are foreign nationals in the typical compared French town, against 1.6% in Breuil-le-Sec. In the typical compared French town, the share of immigrants is 6.5%.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Breuil-le-Sec sits above 61% of compared French towns for married residents (44%)
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
Higher than in 57% of compared French towns: 26% of residents 15 and over are single. In the typical compared French town, married residents come to 43%.
Graduates of higher education make up 31% in Breuil-le-Sec, more than in 54% 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
Few places have so few adults with no qualification: 19% here, fewer than in 51% of compared French towns. By way of comparison, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
Among 41 French towns of 2,467 to 2,582 people, the 10th 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.
Ages run from 37.2 in Villejust to 62.3 in Prayssac.
Of the 6 towns nearest Breuil-le-Sec, 2 are older
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Breuil-le-Sec | 42.6 | 20% | 0.8% | 3% |
| Breuil-le-Vert 3,183 · 1.5 mi | 45.4 | 23% | 0.7% | 3.7% |
| Fitz-James 2,514 · 1.8 mi | 42.4 | 19% | 0.5% | 6.6% |
| Clermont 10,564 · 2 mi | 39.4 | 17% | 1.5% | 8.5% |
| Rantigny 2,524 · 3.1 mi | 39.9 | 18% | 0.7% | 8.8% |
| Liancourt 6,785 · 3.1 mi | 38.4 | 17% | 0.9% | 12% |
| Agnetz 3,058 · 3.6 mi | 44.4 | 18% | 1% | 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 Breuil-le-Sec
What is the population of Breuil-le-Sec?
2,467 at INSEE’s 2023 census, about the same as in 2012 (2,463).
How old are Breuil-le-Sec’s residents?
The median age is 42.6, younger than 62% of compared French towns. 24% are under 18 and 20% 65 or older.
How many second homes are there in Breuil-le-Sec?
8, with occasional dwellings: 0.8% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Breuil-le-Sec?
INSEE counts 73 immigrants (born abroad, not French at birth), 3% of residents, and 40 foreign nationals (1.6%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Breuil-le-Sec?
€28,220 a year per consumption unit in 2023 (median of compared French towns €25,970); 6.0% 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.