A median age of 54.5: Chêne-Sec is older than 93% of compared French towns
Households in social housing are rarer here than in 99% of compared French towns. Census day 2023: 39 residents and 17 households in Chêne-Sec. The share of households headed by a retired person stands at 75%. Here 4.2% of homes are flats, where the figure in the typical compared French town is 30%.
Throughout this page, the Jura 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 Chêne-Sec
One home in three is a second home
The census counted 7 second homes and occasional dwellings in Chêne-Sec, 29% of its 24 homes: higher than in 95% of compared French towns. 100% of them are houses. Their owners live elsewhere, so they aren’t in the population figures on this page. Homes & cars ↓
An older town
Half of Chêne-Sec’s residents are under 54.5 and half over; the median of compared French towns is 44. 38% are 65 or older (France median 22%), 10% 80 or older. Ages ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Chêne-Sec sits above 95% of compared French towns for second homes (29%)
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
One household in nine has no car, against 11% in the median compared French town. Empty homes are rarer here than in 99% of compared French towns. Elsewhere, 2.1% of homes are second homes in the typical compared French town. Households without a car account for 12%.
Since 2012, Chêne-Sec has grown +15%, faster than 81% 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 +6% from 2012 to 2017 and +8% from 2017 to 2023. The median compared French town changed +5% over the same years, the median Jura town −4%.
In Chêne-Sec, 38% of residents are 65 or over, more than in 97% 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
■ Chêne-Sec 54.5. The median compared French town: 44.
About one in ten: that is how common residents aged 15 to 24 are in Chêne-Sec (10%). For comparison, 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
62% women, 38% men
About 62 men for every 100 women. Median share of women: Jura 52.0%, France 51.8%. Women live longer than men, so towns with many older residents have more women.
Chêne-Sec sits below 94% of compared French towns for one-person households (25%)
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 Jura median and the France median
Living alone · share
There are 2.3 people in the average household. Single-parent households are rarer here than in 99% of compared French towns. The usual figure: just over a third of households are one person living alone in the typical compared French town.
Chêne-Sec sits above 96% of compared French towns for households headed by a manual worker (25%)
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 are rarer here than in 99% of compared French towns. The comparison figure for households headed by a manual worker is 14% in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Immigrants: 10%, a higher share than 72% 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.
The median compared commune in Jura has 7.6%; immigrants here make up a share higher than in 72% of compared French towns. 5.1% of residents are foreign nationals, or about one in 20. Across the comparison, 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.
Chêne-Sec sits above 79% of compared French towns for married residents (47%)
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
24% of residents 15 and over are single (typical compared French town: 25%). The benchmark for married residents in the typical compared French town: 43%.
Graduates of higher education: 13%, a lower share than 99% 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 29%, against 19% in the typical compared French town. The wider picture: 30% of adults out of school hold a higher-education qualification in the typical compared French town.
Of 41 French towns its size (39 to 2,582 people), the 7th oldest
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 Villejust (37.2), the oldest Prayssac (62.3).
Nearby, 1 of 6 towns have older populations than Chêne-Sec
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
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 Chêne-Sec
What is the population of Chêne-Sec?
39 at INSEE’s 2023 census, 15% more than in 2012 (34).
How old are Chêne-Sec’s residents?
The median age is 54.5, older than 93% of compared French towns. 18% are under 18 and 38% 65 or older.
How many second homes are there in Chêne-Sec?
7, with occasional dwellings: 29% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Chêne-Sec?
INSEE counts 4 immigrants (born abroad, not French at birth), 10% of residents, and 2 foreign nationals (5.1%). The medians of compared French towns are 6.5% and 4.3%.
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.