Photo: Lionel Allorge · CC BY-SA 3.0Soisy-sur-Seine sits above 93% of compared French towns for households headed by a manager or professional (24%)
In the typical compared French town, just over a third of households are one person living alone; in Soisy-sur-Seine, 28%. This Essonne town had 7,418 residents in 3,150 households at the 2023 census. Across Soisy-sur-Seine, 25% of residents are 65 or over. Few places have as many households in social housing: 17% here, more than in 69% of compared French towns.
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 Soisy-sur-Seine
Many graduates
50% of residents 15 and over who have left education hold a diploma above the bac, 20% a master’s or more (bac+5). Qualifications ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Soisy-sur-Seine’s population changed by +9% since 2012, more than in 67% 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
The median Essonne town changed +6% and the median compared French town +5%; here the first five years brought +5% and the next six +4%.
Soisy-sur-Seine is older than 67% of compared French towns: a median age of 46.5
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Soisy-sur-Seine 46.5. The median compared French town: 44.
Here, 11% of residents are 15 to 24.
Women and men · all residents
52% women, 48% men
About 92 men for every 100 women. Median share of women: Essonne 51.3%, France 51.8%.
A larger share of single-parent households than 83% of compared French towns: 13%
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
Households here average 2.3 people each. Single-parent households: 10% in the typical compared French town, for comparison. Couples with children are about as common here as in the typical compared French town, at 25%.
Flats: 41%, a higher share than 64% 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
Without a car: one household in 11, against 11% in the median compared French town. On average, 30% of homes are flats in the typical compared French town. The census found that 5.3% of homes stand empty in Soisy-sur-Seine.
A median of €34,330 a year per consumption unit
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 €34,330 a year per consumption unit, the median standard of living here is higher than in 95% of compared French towns. 10.0% of the population lives below the poverty line.
Below 87% of compared French towns: 8.1% of households are headed by a manual worker
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 the typical compared French town, nearly a third of households are headed by a retired person; in Soisy-sur-Seine, 34%. Typically, 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).
12% of residents are immigrants, a share 78% of compared French towns don’t reach
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 78% of compared French towns. On average, 6.5% of residents are immigrants in the typical compared French town. The census found that nearly one in ten residents are foreign nationals in Soisy-sur-Seine.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Soisy-sur-Seine sits above 80% of compared French towns for married residents (47%)
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
The share of single residents stands at 24%. Set beside that, 43% of residents 15 and over are married in the typical compared French town.
In Soisy-sur-Seine, 50% of adults out of school hold a higher-education qualification, more than in 93% 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
13% of adults out of school have no qualification, against 19% in the typical compared French town. The usual figure: 30% of adults out of school hold a higher-education qualification in the typical compared French town.
Among 41 French towns of 7,320 to 7,524 people, the 18th oldest
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
Gières is the youngest (36); Perros-Guirec the oldest (62.4).
Soisy-sur-Seine is older than every town around it
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Soisy-sur-Seine | 46.5 | 25% | 1.7% | 12% |
| Étiolles 3,105 · 1.1 mi | 46.1 | 23% | 1.4% | 9.3% |
| Évry-Courcouronnes 66,919 · 1.7 mi | 33.1 | 12% | 2.1% | 30% |
| Ris-Orangis 31,189 · 2 mi | 34.4 | 13% | 0.6% | 30% |
| Saint-Germain-lès-Corbeil 7,469 · 2.5 mi | 41.5 | 20% | 0.8% | 9.9% |
| Tigery 4,333 · 2.7 mi | 33.7 | 7.8% | 0.2% | 11% |
| Draveil 30,098 · 3 mi | 41.1 | 19% | 1.1% | 17% |
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 Soisy-sur-Seine
What is the population of Soisy-sur-Seine?
7,418 at INSEE’s 2023 census, 9% more than in 2012 (6,795).
How old are Soisy-sur-Seine’s residents?
The median age is 46.5, older than 67% of compared French towns. 21% are under 18 and 25% 65 or older.
How many second homes are there in Soisy-sur-Seine?
58, with occasional dwellings: 1.7% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Soisy-sur-Seine?
INSEE counts 890 immigrants (born abroad, not French at birth), 12% of residents, and 640 foreign nationals (8.6%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Soisy-sur-Seine?
€34,330 a year per consumption unit in 2023 (median of compared French towns €25,970); 10.0% 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 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.