Only 3.5% of households have no car in Cerny
The share of one-person households trails 87% of compared French towns: 27%. 5% of households rent social housing (HLM), fewer than in 86% of compared French towns. In 2023, the Census found 3,531 residents in Cerny, living in 1,450 households. Households headed by a retired person make up about one in four here (28%).
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.
Growth of +6% since 2012 puts Cerny ahead of 55% 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
From 2012 to 2017 the population moved ±0%, and from 2017 to 2023 +6%; the median compared French town changed +5% and the median Essonne town +6%.
Younger than 59% of compared French towns: half of Cerny is under 42.9
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Cerny 42.9. The median compared French town: 44.
There is little gap on residents aged 15 to 24: 11%, about the same as in the typical compared French town. In Cerny, 20% of residents are 65 or over.
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Essonne 51.3%, France 51.8%.
Cerny ranks above 79% of compared French towns on couples with children: 31%
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
A household here holds 2.4 people on average. Cerny has more single-parent households than 57% of compared French towns, at 10%. On average, 25% of households are couples with children in the typical compared French town.
Flats: 16%, a lower share than 75% 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
3.4% of homes are second homes (typical compared French town: 2.1%). Lower than in 53% of compared French towns: 6.5% of homes stand empty. The wider picture: 30% of homes are flats in the typical compared French town.
Median standard of living: €30,290 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.
The median standard of living in Cerny is €30,290 a year per consumption unit: higher than in 86% of compared French towns. Some 5.0% of residents fall below the poverty line.
Households headed by a manager or professional: 16%, a higher share than 78% 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. The wider picture: 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).
5.8% of residents are foreign nationals, more than in 62% 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.
The median compared commune in Essonne has 13%; immigrants here make up a share higher than in 54% of compared French towns. As a yardstick, 4.3% of residents are foreign nationals in the typical compared French town. On the census count, 7.1% of residents are immigrants.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Married residents: 42%, a lower share than 59% 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
Census figures put single residents at 24% in Cerny. As a reference point, 43% of residents 15 and over are married in the typical compared French town.
34% of adults out of school hold a higher-education qualification, a share 63% of compared French towns don’t reach
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 19% in the typical compared French town, the share of adults with no qualification in Cerny comes in at 17%. Across the comparison, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
Ranked by age, 11th youngest of 41 French towns this size
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 Rubelles (34.9), the oldest Deauville (63.3).
4 of 6 neighbors are older than Cerny
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Cerny | 42.9 | 20% | 3.4% | 7.1% |
| La Ferté-Alais 3,731 · 1.4 mi | 43 | 19% | 1.6% | 9.6% |
| Itteville 6,746 · 3 mi | 41.3 | 15% | 1.2% | 6.1% |
| Ballancourt-sur-Essonne 8,191 · 4 mi | 40.5 | 19% | 0.9% | 14% |
| Saint-Vrain 3,089 · 4 mi | 44.9 | 24% | 2.1% | 9.3% |
| Lardy 5,530 · 4 mi | 43.6 | 16% | 2.6% | 8.3% |
| Boutigny-sur-Essonne 3,146 · 4.1 mi | 45.2 | 23% | 3.4% | 7.4% |
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 Cerny
What is the population of Cerny?
3,531 at INSEE’s 2023 census, 6% more than in 2012 (3,332).
How old are Cerny’s residents?
The median age is 42.9, younger than 59% of compared French towns. 22% are under 18 and 20% 65 or older.
How many second homes are there in Cerny?
54, with occasional dwellings: 3.4% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Cerny?
INSEE counts 250 immigrants (born abroad, not French at birth), 7.1% of residents, and 200 foreign nationals (5.8%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Cerny?
€30,290 a year per consumption unit in 2023 (median of compared French towns €25,970); 5.0% 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.