More couples with children than 94% of compared French towns: 36%
With households without a car at 3.3%, Saint-Just-Chaleyssin is behind 98% of compared French towns on that count. Its 1,080 households held 2,695 residents at the 2023 Census. Across Saint-Just-Chaleyssin, 3.5% of homes stand empty. 9.9% of homes are flats, fewer than in 87% of compared French towns.
Throughout this page, the Isère 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 Saint-Just-Chaleyssin
A town of families
36% of households are couples with children and 6.9% single parents with children; 20% of residents are under 15. Households ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Saint-Just-Chaleyssin grew +11% from 2012 to 2023, faster than 71% 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 +5%, and from 2017 to 2023 +5%; the median compared French town changed +5% and the median Isère town +7%.
A lower share of residents aged 65 and over than 71% of compared French towns, at 19%
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Saint-Just-Chaleyssin 43.5. The median compared French town: 44.
With residents aged 15 to 24 at 9.7%, Saint-Just-Chaleyssin is behind 70% of compared French towns on that count. What’s more, half of the town’s residents are under 43.5, younger than in 54% of compared French towns. To put it in context, 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Isère 51.3%, France 51.8%.
One-person households make up 23% in Saint-Just-Chaleyssin, less than in 97% 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 Isère median and the France median
Living alone · share
Households average 2.5 people. The wider picture: just over a third of households are one person living alone in the typical compared French town. Compared with other places, single-parent households are scarce here: 6.9%, fewer than in 91% of compared French towns.
5.4% of households rent social housing (HLM), below 85% 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
Of all households, 5.5% moved in during the last two years and 24% have stayed three decades or more. As a yardstick, 12% of households rent social housing (HLM) in the typical compared French town. Compared with other places, second homes are scarce here: 1.5%, fewer than in 63% of compared French towns.
Median living standard: €31,820 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.
At €31,820 a year per consumption unit, the median standard of living here is higher than in 91% of compared French towns. The poverty rate is 5.0%.
More households headed by a manager or professional than 78% of compared French towns: 16%
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
27% of households are headed by a retired person, against 32% in the typical compared French town. By way of comparison, nearly one in ten households are headed by a manager or professional in the typical compared French town. Locally, 15% of households are headed by a manual worker.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Only 2.9% of residents are immigrants in Saint-Just-Chaleyssin
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 Isère has 8%; immigrants here make up a share lower than in 83% of compared French towns. Put another way, about one in 53: 1.9% of residents are foreign nationals. On average, 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.
Saint-Just-Chaleyssin sits above 95% of compared French towns for married residents (51%)
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
The share of single residents trails 93% of compared French towns: 20%. To put it in context, 43% of residents 15 and over are married in the typical compared French town.
Graduates of higher education make up 42% in Saint-Just-Chaleyssin, more than in 83% 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
15% of adults out of school have no qualification; in the typical compared French town the figure is 19%. By way of comparison, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
The 15th youngest of 41 French towns of 2,662 to 2,729 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 34 in Roissy-en-France to 63.6 in Piriac-sur-Mer.
Among its 6 nearest neighbors, 2 are older than Saint-Just-Chaleyssin
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Saint-Just-Chaleyssin | 43.5 | 19% | 1.5% | 2.9% |
| Valencin 2,878 · 1.9 mi | 40.1 | 14% | 0.9% | 2.8% |
| Saint-Pierre-de-Chandieu 4,616 · 3.8 mi | 44.7 | 19% | 1.3% | 4.8% |
| Chaponnay 4,548 · 4 mi | 43.4 | 20% | 2.7% | 4.3% |
| Heyrieux 4,956 · 4.3 mi | 44.6 | 22% | 1.4% | 5% |
| Saint-Georges-d'Espéranche 3,545 · 4.5 mi | 42.8 | 20% | 1.7% | 3.2% |
| Diémoz 2,947 · 4.6 mi | 42.6 | 21% | 1% | 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 Saint-Just-Chaleyssin
What is the population of Saint-Just-Chaleyssin?
2,695 at INSEE’s 2023 census, 11% more than in 2012 (2,437).
How old are Saint-Just-Chaleyssin’s residents?
The median age is 43.5, younger than 54% of compared French towns. 24% are under 18 and 19% 65 or older.
How many second homes are there in Saint-Just-Chaleyssin?
17, with occasional dwellings: 1.5% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Saint-Just-Chaleyssin?
INSEE counts 77 immigrants (born abroad, not French at birth), 2.9% of residents, and 50 foreign nationals (1.9%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Saint-Just-Chaleyssin?
€31,820 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 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.