Half of Souzy-la-Briche is under 30.3, younger than 99% of compared French towns
The share of empty homes is 1.2%, against 6.7% in the typical compared French town. For Souzy-la-Briche, the census puts households in social housing at 1.3%. Few places have so few households headed by a retired person: 19% here, fewer than in 96% of compared French towns. At the 2023 Census, 503 people lived here, in 160 households.
Throughout this page, the Essonne 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 Souzy-la-Briche
A young town
Half of Souzy-la-Briche’s residents are under 30.3 and half over; the median of compared French towns is 44. 30% are under 15 and 11% are 65 or older. Ages ↓
Immigrants
INSEE counts 100 immigrants in Souzy-la-Briche (people born abroad who weren’t French at birth, whatever their nationality now): 29% of residents, against 13% for the median compared commune in Essonne. 34% are foreign nationals. Immigrants and foreign nationals ↓
A town of families
41% of households are couples with children and 9.4% single parents with children; 30% of residents are under 15. Households ↓
Growing fast
Souzy-la-Briche had 403 residents at the 2012 census and 503 in 2023, up 25%: faster growth than in 94% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
+25% since 2012, a pace 94% of compared French towns didn’t match
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
Medians for comparison: +5% across compared French towns, +6% in Essonne.
Residents aged 65 and over make up 11% in Souzy-la-Briche, less than in 98% 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
■ Souzy-la-Briche 30.3. The median compared French town: 44.
12% of residents are 15 to 24 (typical compared French town: 11%). Measured more widely, 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
54% women, 46% men
About 84 men for every 100 women. Median share of women: Essonne 51.3%, France 51.8%.
A larger share of couples with children than 99% of compared French towns: 41%
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 Essonne median and the France median
Living alone · share
On average, 3 people share a household. Souzy-la-Briche has fewer one-person households than 94% of compared French towns, at 25%. Single-parent households make up 9.4%, close to the figure in the typical compared French town.
A town of second homes: 6.5% of its homes
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
Of all households, 9.6% moved in during the last two years and 24% have stayed three decades or more. In the typical compared French town, second homes come to 2.1%. Lower than in 85% of compared French towns: 11% of homes are flats.
Median living standard: €27,260 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 €27,260 a year per consumption unit and half below; the level is higher than in 64% of compared French towns.
Above 78% of compared French towns: 16% of households are headed by a manager or professional
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
The share of households headed by a manual worker is 13%, against 14% in the typical compared French town. Measured more widely, 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).
Souzy-la-Briche sits above 98% of compared French towns for immigrants (29%)
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.
The median compared commune in Essonne has 13%; immigrants here make up a share higher than in 98% of compared French towns. The wider picture: 6.5% of residents are immigrants in the typical compared French town. For Souzy-la-Briche, the census puts foreign nationals at 34%.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Souzy-la-Briche sits above 69% of compared French towns for single residents (28%)
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
Married: 44%; in a PACS: 11%; against 43% and 6.1% in the median compared French town, with 4% widowed. The usual figure: 25% of residents 15 and over are single in the typical compared French town.
Souzy-la-Briche sits above 76% of compared French towns for adults with no qualification (24%)
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 30% in the typical compared French town, the share of graduates of higher education in Souzy-la-Briche comes in at 34%. The wider picture: nearly a fifth of adults out of school have no qualification in the typical compared French town.
The youngest of 41 French towns of 503 to 2,582 people
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 30.3 in Souzy-la-Briche to 62.3 in Prayssac.
No nearby town is as young as Souzy-la-Briche
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Souzy-la-Briche | 30.3 | 11% | 6.5% | 29% |
| Saint-Chéron 5,132 · 2 mi | 41.6 | 18% | 13% | 9.8% |
| Breuillet 9,157 · 3.1 mi | 39.4 | 16% | 1.3% | 13% |
| Étréchy 6,986 · 3.2 mi | 43.8 | 23% | 1.6% | 8.5% |
| Boissy-sous-Saint-Yon 3,882 · 3.3 mi | 40.7 | 16% | 2% | 6% |
| Bruyères-le-Châtel 3,788 · 4.6 mi | 40.6 | 17% | 1% | 8.1% |
| Égly 7,166 · 5 mi | 35.7 | 14% | 1% | 20% |
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 Souzy-la-Briche
What is the population of Souzy-la-Briche?
503 at INSEE’s 2023 census, 25% more than in 2012 (403).
How old are Souzy-la-Briche’s residents?
The median age is 30.3, younger than 99% of compared French towns. 35% are under 18 and 11% 65 or older.
How many second homes are there in Souzy-la-Briche?
11, with occasional dwellings: 6.5% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Souzy-la-Briche?
INSEE counts 140 immigrants (born abroad, not French at birth), 29% of residents, and 170 foreign nationals (34%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Souzy-la-Briche?
€27,260 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.