Photo: EnzoDeg40 · CC BY-SA 4.036% of households are couples with children, more than in 94% of compared French towns
3.2% of homes stand empty; in the typical compared French town the figure is 6.7%. At the same time, more residents aged 15 to 24 than in 95% of compared French towns: 15%. Cesson had 11,222 residents in 4,350 households at the 2023 Census. Put another way, about one in ten: one in ten households are headed by a manual worker.
Throughout this page, the Seine-et-Marne 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 Cesson
A town of families
36% of households are couples with children and 11% single parents with children; 22% of residents are under 15. Households ↓
Growing fast
Cesson had 9,332 residents at the 2012 census and 11,222 in 2023, up 20%: faster growth than in 90% of compared French towns. Population ↓
A young town
Half of Cesson’s residents are under 38.2 and half over; the median of compared French towns is 44. 22% are under 15 and 14% are 65 or older. Ages ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
From 2012 to 2023, Cesson outgrew 90% of compared French towns: +20%
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 +12%, and from 2017 to 2023 +8%; the median compared French town changed +5% and the median Seine-et-Marne town +8%.
Residents aged 65 and over make up 14% in Cesson, less than in 94% 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
■ Cesson 38.2. The median compared French town: 44.
Half of Cesson’s residents are under 38.2, younger than in 87% of compared French towns. 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 94 men for every 100 women. Median share of women: Seine-et-Marne 51.4%, France 51.8%.
30% of households are one person living alone, below 78% 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 Seine-et-Marne median and the France median
Living alone · share
Single-parent households: 11% here and 10% in the typical compared French town. Across the comparison, just over a third of households are one person living alone in the typical compared French town. On average, 2.6 people share a household.
Fewer flats than 60% of compared French towns: 24%
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
At 1.3%, the share of second homes is in line with the figure in the typical compared French town. Typically, 30% of homes are flats in the typical compared French town. Of all households, 8.6% moved in during the last two years and 17% have stayed three decades or more.
Half above, half below €30,090 a year in 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.
Living standards centre on €30,090 a year per consumption unit: higher than in 85% of compared French towns. Below the poverty line: 8.0% of residents.
Only 24% of households are headed by a retired person in Cesson
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
By its share of households headed by a manager or professional (20%), Cesson is above 87% of compared French towns. In the typical compared French town, the share of households headed by a retired person is 32%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
10% of residents are immigrants, more than in 71% 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.
Set against 4.3% in the typical compared French town, 5.8% of residents are foreign nationals in Cesson. Elsewhere, 6.5% of residents are immigrants in the typical compared French town. The median compared commune in Seine-et-Marne has 14%; immigrants here make up a share higher than in 71% of compared French towns.
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 78% of compared French towns: 30%
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, single residents come to 25%.
10% of adults out of school have no qualification, below 95% 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
Graduates of higher education: 42% here and 30% in the typical compared French town. In the typical compared French town, adults with no qualification come to 19%.
The youngest of 41 French towns of 10,977 to 11,474 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.
The youngest is Cesson (38.2), the oldest Arcachon (67.4).
Cesson and its 6 nearest towns: 1 of them 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 |
|---|---|---|---|---|
| Cesson | 38.2 | 14% | 1.3% | 10% |
| Vert-Saint-Denis 9,291 · 0.9 mi | 35.7 | 14% | 0.8% | 13% |
| Nandy 6,350 · 2 mi | 36.3 | 13% | 2.2% | 14% |
| Le Mée-sur-Seine 19,527 · 2.3 mi | 37.2 | 17% | 3.5% | 26% |
| Savigny-le-Temple 31,148 · 2.4 mi | 33.4 | 10% | 0.3% | 22% |
| Melun 45,995 · 3.2 mi | 32.3 | 11% | 1.1% | 28% |
| Boissise-le-Roi 3,941 · 3.4 mi | 46.9 | 25% | 1.2% | 9.7% |
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 Cesson
What is the population of Cesson?
11,222 at INSEE’s 2023 census, 20% more than in 2012 (9,332).
How old are Cesson’s residents?
The median age is 38.2, younger than 87% of compared French towns. 27% are under 18 and 14% 65 or older.
How many second homes are there in Cesson?
57, with occasional dwellings: 1.3% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Cesson?
INSEE counts 1,140 immigrants (born abroad, not French at birth), 10% of residents, and 650 foreign nationals (5.8%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Cesson?
€30,090 a year per consumption unit in 2023 (median of compared French towns €25,970); 8.0% 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.