Igny: 36% of households are couples with children, above 95% of compared French towns
Against a figure of 9.4% in the typical compared French town, the share of households headed by a manager or professional in Igny comes in at 33%. For Igny, the census puts residents aged 65 and over at 16%. Higher than in 72% of compared French towns: 4.1% of homes are second homes. The 2023 Census put the town’s population at 10,833, in 4,400 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 Igny
A town of families
36% of households are couples with children and 8.7% single parents with children; 19% of residents are under 15. Households ↓
Many graduates
56% of residents 15 and over who have left education hold a diploma above the bac, 27% a master’s or more (bac+5). Qualifications ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Igny changed by +2% from 2012 to 2023, behind 60% 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 Essonne town +6%.
Younger than 70% of compared French towns: half of Igny is under 41.4
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Igny 41.4. The median compared French town: 44.
In the typical compared French town, 11% of residents are 15 to 24; in Igny, 12%.
Women and men · all residents
51% women, 49% men
About an even split. Median share of women: Essonne 51.3%, France 51.8%.
In Igny, 29% of households are one person living alone, fewer than in 80% 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 Essonne median and the France median
Living alone · share
The average household has 2.5 people. The share of one-person households in the typical compared French town is 35%. Fewer single-parent households than in 71% of compared French towns: 8.7%.
Above 59% of compared French towns: 35% of homes are flats
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
Households that moved in under two years ago: 6.9%. Those in their home 30 years or more: 19%. Few places have so few households without a car: 9.2% here, fewer than in 58% of compared French towns. Little separates the share of empty homes here, 6.1%, from the figure in the typical compared French town.
€36,320 a year: the median standard of living
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 €36,320 a year per consumption unit and half below; the level is higher than in 96% of compared French towns. As for poverty, 7.0% of residents are below the line.
Households headed by a manual worker make up 5.8% in Igny, less than in 94% 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
Households headed by a retired person make up 25%, against 32% in the typical compared French town. On average, 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).
Igny: 11% of residents are immigrants, above 74% of compared French towns
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, 4.3% of residents are foreign nationals; in Igny, 7%. The share of immigrants in the typical compared French town is 6.5%.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Igny: 47% of residents 15 and over are married, above 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
The share of single residents stands at 26%. Married residents make up 43% in the typical compared French town.
Graduates of higher education: 56%, a higher share than 96% 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
The share of adults with no qualification is 11%, against 19% in the typical compared French town. Typically, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
13th lowest median age among 41 French towns of 10,661 to 11,013
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
Chanteloup-les-Vignes is the youngest (33.7); Dinard the oldest (61.4).
2 in 6 nearby towns have a higher median age than Igny
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Igny | 41.4 | 16% | 4.1% | 11% |
| Bièvres 4,686 · 1.4 mi | 40.5 | 16% | 1.6% | 9.6% |
| Palaiseau 37,471 · 1.6 mi | 33.1 | 14% | 5.4% | 21% |
| Verrières-le-Buisson 15,057 · 1.9 mi | 47.2 | 24% | 1.8% | 11% |
| Massy 51,729 · 2.2 mi | 34.7 | 13% | 2.9% | 25% |
| Saclay 4,437 · 2.4 mi | 40.4 | 16% | 2% | 9.5% |
| Villebon-sur-Yvette 10,291 · 2.5 mi | 42.4 | 20% | 2.1% | 12% |
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 Igny
What is the population of Igny?
10,833 at INSEE’s 2023 census, 2% more than in 2012 (10,573).
How old are Igny’s residents?
The median age is 41.4, younger than 70% of compared French towns. 24% are under 18 and 16% 65 or older.
How many second homes are there in Igny?
200, with occasional dwellings: 4.1% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Igny?
INSEE counts 1,170 immigrants (born abroad, not French at birth), 11% of residents, and 760 foreign nationals (7%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Igny?
€36,320 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 October 30, 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.