Fleury-Mérogis is younger than 99% of compared French towns: a median age of 30.2
In Fleury-Mérogis, 81% of homes are flats, beside 30% in the typical compared French town. The 2023 Census put the town’s population at 13,721, in 3,370 households. 9.1% of households are headed by a retired person, or about one in 11. Lower than in 87% of compared French towns: 0.8% of homes are second homes.
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 Fleury-Mérogis
Immigrants
INSEE counts 4,000 immigrants in Fleury-Mérogis (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. 25% are foreign nationals. Immigrants and foreign nationals ↓
A young town
Half of Fleury-Mérogis’ residents are under 30.2 and half over; the median of compared French towns is 44. 18% are under 15 and 4.7% are 65 or older. Ages ↓
Growing fast
Fleury-Mérogis had 9,165 residents at the 2012 census and 13,721 in 2023, up 50%: faster growth than in 99% of compared French towns. Population ↓
Social housing
45% of households rent from a social landlord (HLM), 22% rent privately and 31% own their home. Homes & cars ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Fleury-Mérogis’s population changed by +50% since 2012, more than in 99% 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 change was +38% from 2012 to 2017 and +8% from 2017 to 2023. The median compared French town changed +5% over the same years, the median Essonne town +6%.
Residents aged 65 and over make up 4.7% in Fleury-Mérogis, less than in 99% 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
■ Fleury-Mérogis 30.2. The median compared French town: 44.
The figure for residents aged 15 to 24 is 19% in Fleury-Mérogis and 11% in the typical compared French town. On average, 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
36% women, 64% men
About 56 women for every 100 men. Median share of women: Essonne 51.3%, France 51.8%.
22% of households are single parents, more than in 99% 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 2.6 people. More couples with children than in 70% of compared French towns: 29%. The comparison figure for single-parent households is 10% in the typical compared French town. One-person households: 34% here and 35% in the typical compared French town.
A larger share of households in social housing than 99% of compared French towns: 45%
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
Empty homes: 8%, above 64% of compared French towns. As a yardstick, just over one in ten households rent social housing (HLM) in the typical compared French town. Households without a car: 14% of the total.
Median living standard: €21,470 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.
Living standards centre on €21,470 a year per consumption unit: lower than in 91% of compared French towns. Poverty touches 25.0% of residents.
18% of households are headed by a manual worker, more than in 76% 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 manager or professional: 8.2% here and 9.4% in the typical compared French town. The usual figure: 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).
Fleury-Mérogis: 29% of residents are immigrants, above 98% 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.
25% of residents are foreign nationals, against 4.3% in the typical compared French town. The usual figure: 6.5% of residents are immigrants in the typical compared French town.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Single residents: 50%, a higher share than 99% 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
43% of residents 15 and over are married in the typical compared French town, against 28% in Fleury-Mérogis. The comparison figure for single residents is 25% in the typical compared French town.
Fleury-Mérogis sits below 87% of compared French towns for graduates of higher education (19%)
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
By its share of adults with no qualification (27%), Fleury-Mérogis is above 83% of compared French towns. The wider picture: 30% of adults out of school hold a higher-education qualification in the typical compared French town.
The youngest of 41 French towns of 13,316 to 14,129 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 30.2 in Fleury-Mérogis to 55.6 in Douarnenez.
Fleury-Mérogis is younger 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 |
|---|---|---|---|---|
| Fleury-Mérogis | 30.2 | 4.7% | 0.8% | 29% |
| Sainte-Geneviève-des-Bois 35,438 · 1.3 mi | 40.8 | 18% | 1.1% | 21% |
| Morsang-sur-Orge 21,667 · 1.4 mi | 38 | 14% | 1.4% | 20% |
| Grigny 26,842 · 1.5 mi | 31 | 9.6% | 0.2% | 40% |
| Bondoufle 10,767 · 1.9 mi | 38.2 | 16% | 1% | 11% |
| Villemoisson-sur-Orge 7,332 · 2.1 mi | 42.3 | 19% | 1.1% | 13% |
| Saint-Michel-sur-Orge 21,776 · 2.1 mi | 36.9 | 15% | 1.2% | 22% |
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 Fleury-Mérogis
What is the population of Fleury-Mérogis?
13,721 at INSEE’s 2023 census, 50% more than in 2012 (9,165).
How old are Fleury-Mérogis’ residents?
The median age is 30.2, younger than 99% of compared French towns. 22% are under 18 and 4.7% 65 or older.
How many second homes are there in Fleury-Mérogis?
30, with occasional dwellings: 0.8% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Fleury-Mérogis?
INSEE counts 3,950 immigrants (born abroad, not French at birth), 29% of residents, and 3,400 foreign nationals (25%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Fleury-Mérogis?
€21,470 a year per consumption unit in 2023 (median of compared French towns €25,970); 25.0% 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.