Mennecy is younger than 83% of compared French towns: a median age of 39.2
With households in social housing at 21%, Mennecy is ahead of 79% of compared French towns on that count. The 2023 Census counted 16,433 residents in 6,830 households. Households headed by a retired person: 23% of the total. The town has more couples with children than 73% of compared French towns, at 29%.
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 Mennecy
Growing fast
Mennecy had 13,127 residents at the 2012 census and 16,433 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.
A +25% change since 2012: Mennecy grew faster than 94% 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 +9% from 2012 to 2017 and +15% from 2017 to 2023. The median compared French town changed +5% over the same years, the median Essonne town +6%.
Below 87% of compared French towns: 16% of residents are 65 or over
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Mennecy 39.2. The median compared French town: 44.
Residents aged 15 to 24 make up 13%, against 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
52% women, 48% men
About 93 men for every 100 women. Median share of women: Essonne 51.3%, France 51.8%.
Single-parent households make up 14% in Mennecy, more than in 90% 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
Here nearly a third of households are one person living alone, where the figure in the typical compared French town is 35%. Set beside that, one in ten households are single parents in the typical compared French town.
Empty homes make up 4.3% in Mennecy, less than in 83% 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
Nearly one in ten households have no car, against 11% in the typical compared French town. The usual figure: 6.7% of homes stand empty in the typical compared French town. The share of flats stands at 44%. Few places have so few second homes: 1.2% here, fewer than in 72% of compared French towns.
A median standard of living of €30,350 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.
Per consumption unit, half of residents live on more than €30,350 a year: higher than in 86% of compared French towns. Living below the poverty line: 10.0% of residents.
Above 87% of compared French towns: 20% 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
Households headed by a manual worker: 9.4% here and 14% in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
In Mennecy, 12% of residents are immigrants, more than in 78% 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.
Compared with 4.3% in the typical compared French town, 8% of residents are foreign nationals here. 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.
A larger share of single residents than 81% of compared French towns: 31%
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
Lower than in 52% of compared French towns: 43% of residents 15 and over are married. The benchmark for single residents in the typical compared French town: 25%.
Mennecy: 45% of adults out of school hold a higher-education qualification, above 88% 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 12%, against 19% in the typical compared French town. For graduates of higher education, the comparison in the typical compared French town is 30%.
41 French towns of 15,898 to 16,993 people: this is the 11th youngest
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
At the ends of the range sit Saint-Julien-en-Genevois (35.4), the youngest, and La Baule-Escoublac (60.4), the oldest.
Median age: 2 of the 6 towns around Mennecy are older
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Mennecy | 39.2 | 16% | 1.2% | 12% |
| Ormoy 3,225 · 1.3 mi | 32.2 | 7.8% | 0.8% | 17% |
| Villabé 5,830 · 2.1 mi | 36.9 | 14% | 0.7% | 17% |
| Le Coudray-Montceaux 4,801 · 2.5 mi | 39.6 | 17% | 2.3% | 12% |
| Lisses 7,373 · 3 mi | 41.1 | 18% | 0.8% | 13% |
| Vert-le-Petit 2,714 · 3.1 mi | 38.7 | 12% | 1% | 6.9% |
| Corbeil-Essonnes 54,471 · 3.3 mi | 32.7 | 10% | 0.8% | 30% |
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 Mennecy
What is the population of Mennecy?
16,433 at INSEE’s 2023 census, 25% more than in 2012 (13,127).
How old are Mennecy’s residents?
The median age is 39.2, younger than 83% of compared French towns. 24% are under 18 and 16% 65 or older.
How many second homes are there in Mennecy?
89, with occasional dwellings: 1.2% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Mennecy?
INSEE counts 1,950 immigrants (born abroad, not French at birth), 12% of residents, and 1,310 foreign nationals (8%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Mennecy?
€30,350 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 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.