Photo: Cyrilb1881 · CC BY-SA 3.0Half of Saulx-les-Chartreux is under 37.8, younger than 89% of compared French towns
A quarter of households are couples with children in the typical compared French town, against 33% in Saulx-les-Chartreux. The town counted 6,733 residents and 2,860 households at the 2023 Census. The share of households headed by a manager or professional stands at 17%. At 1.1%, the share of second homes is lower than in 77% of compared French towns.
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 Saulx-les-Chartreux
Growing fast
Saulx-les-Chartreux had 5,128 residents at the 2012 census and 6,733 in 2023, up 31%: faster growth than in 97% of compared French towns. Population ↓
A young town
Half of Saulx-les-Chartreux’s residents are under 37.8 and half over; the median of compared French towns is 44. 21% are under 15 and 14% are 65 or older. Ages ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Since 2012, Saulx-les-Chartreux has grown +31%, faster than 97% 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 median compared French town changed +5% over the same years, the median Essonne town +6%. The change was +15% from 2012 to 2017 and +14% from 2017 to 2023.
A lower share of residents aged 65 and over than 93% of compared French towns, at 14%
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Saulx-les-Chartreux 37.8. The median compared French town: 44.
Just over one in ten residents are 15 to 24. As a reference point, 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%.
32% of households are one person living alone, fewer than in 66% 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
There are 2.3 people in the average household. In the typical compared French town, just over a third of households are one person living alone. On single-parent households, Saulx-les-Chartreux sits higher than 63% of compared French towns: 11%.
A larger share of households in social housing than 67% of compared French towns: 17%
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
30% of homes are flats in the typical compared French town, against 36% in Saulx-les-Chartreux. Households in social housing: 12% in the typical compared French town, for comparison. The share of households without a car stands at 8.4%.
A typical living standard of €30,140 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 €30,140 a year: higher than in 85% of compared French towns. The poverty rate is 9.0%.
25% of households are headed by a retired person, fewer than in 84% 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
By its share of households headed by a manual worker (10%), Saulx-les-Chartreux is below 75% of compared French towns. Set beside that, 32% of households are headed by a retired person in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
More immigrants than 76% of compared French towns: 11%
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.
Nearly one in ten residents are foreign nationals (typical compared French town: 4.3%). Immigrants make up 6.5% 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.
Only 42% of residents 15 and over are married in Saulx-les-Chartreux
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
On the census count, 25% of residents 15 and over are single. In the typical compared French town, the share of married residents is 43%.
Above 82% of compared French towns: 41% of adults out of school hold a higher-education qualification
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
In Saulx-les-Chartreux, 15% of adults out of school have no qualification, beside 19% in the typical compared French town. Against that, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
41 French towns of 6,653 to 6,810 people: this is the 3rd 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.
The youngest is Merville (36.9), the oldest Châtelaillon-Plage (59.8).
3 in 6 nearby towns have a higher median age than Saulx-les-Chartreux
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Saulx-les-Chartreux | 37.8 | 14% | 1.1% | 11% |
| Longjumeau 21,996 · 1.1 mi | 36.9 | 15% | 1.4% | 21% |
| Champlan 2,615 · 1.3 mi | 42.2 | 17% | 2.4% | 20% |
| Ballainvilliers 4,904 · 1.4 mi | 38.5 | 16% | 0.5% | 9.2% |
| La Ville-du-Bois 8,161 · 1.9 mi | 38.2 | 14% | 2.2% | 13% |
| Villejust 2,558 · 2 mi | 37.2 | 10% | 7.5% | 11% |
| Chilly-Mazarin 20,443 · 2.1 mi | 36.8 | 14% | 1.7% | 24% |
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 Saulx-les-Chartreux
What is the population of Saulx-les-Chartreux?
6,733 at INSEE’s 2023 census, 31% more than in 2012 (5,128).
How old are Saulx-les-Chartreux’s residents?
The median age is 37.8, younger than 89% of compared French towns. 25% are under 18 and 14% 65 or older.
How many second homes are there in Saulx-les-Chartreux?
34, with occasional dwellings: 1.1% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Saulx-les-Chartreux?
INSEE counts 760 immigrants (born abroad, not French at birth), 11% of residents, and 580 foreign nationals (8.6%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Saulx-les-Chartreux?
€30,140 a year per consumption unit in 2023 (median of compared French towns €25,970); 9.0% 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.