8.3% of households are couples with children, fewer than in 99% of compared French towns
Compared with 11% in the typical compared French town, 4.7% of households have no car here. The 2023 Census put Châtelblanc’s population at 117, in 57 households. Locally, a quarter of households are headed by a manual worker. Half of the town’s residents are under 41.4, younger than in 70% of compared French towns.
Throughout this page, the Doubs 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 Châtelblanc
One home in three is a second home
The census counted 33 second homes and occasional dwellings in Châtelblanc, 33% of its 100 homes: higher than in 95% of compared French towns. 61% of them are houses. Their owners live elsewhere, so they aren’t in the population figures on this page. Homes & cars ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
33% of homes in Châtelblanc are second homes
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
Long tenure is the mark of 27% of households (30 years or more), short tenure of 16% (under two years). Second homes make up 2.1% in the typical compared French town. Households in social housing are rarer here than in 99% of compared French towns. Against a figure of 6.7% in the typical compared French town, the share of empty homes in Châtelblanc comes in at 9.5%.
Since 2012, Châtelblanc has changed by +1%, slower than 66% 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
Here the change came as +3% to 2017, then −3% to 2023. Medians for comparison: +5% across compared French towns, −1% in Doubs.
Residents aged 65 and over make up 19% in Châtelblanc, less than in 70% 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
■ Châtelblanc 41.4. The median compared French town: 44.
In Châtelblanc, nearly one in ten residents are 15 to 24, beside 11% in the typical compared French town. As a reference point, 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
44% women, 56% men
About 79 women for every 100 men. Median share of women: Doubs 51.3%, France 51.8%.
Single-parent households make up 17% in Châtelblanc, more than in 98% 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 Doubs median and the France median
Living alone · share
Average household size: 2.1 people. For single-parent households, the comparison in the typical compared French town is 10%. 33% of households are one person living alone, a lower share than in 59% of compared French towns.
The median resident lives on €32,470 a year per consumption unit
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.
The midpoint of living standards here is €32,470 a year per consumption unit, higher than in 92% of compared French towns.
Households headed by a retired person make up 33% in Châtelblanc, more than in 55% 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
Households headed by a manager or professional are rarer here than in 99% of compared French towns. By way of comparison, 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).
A smaller share of foreign nationals than 86% of compared French towns: 1.5%
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.
Immigrants make up a share lower than in two thirds of compared French towns; the median compared commune in Doubs has 8.5%. Measured more widely, 4.3% of residents are foreign nationals in the typical compared French town. Census figures put immigrants at 4.6% in Châtelblanc.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Châtelblanc ranks above 69% of compared French towns on single residents: 28%
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
In the median compared French town 43% are married and 6.1% in a PACS; here it is 40% and 14%, and 6.1% are widowed. As a yardstick, a quarter of residents 15 and over are single in the typical compared French town.
Fewer adults with no qualification than 99% of compared French towns: 7.4%
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: 28%, below 58% of compared French towns. As a reference point, 19% of adults out of school have no qualification in the typical compared French town.
Of 41 French towns its size (117 to 2,582 people), the 6th 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 Villejust (37.2), the youngest, and Prayssac (62.3), the oldest.
Châtelblanc sits below 1 of its 3 closest neighbors on median age
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Châtelblanc | 41.4 | 19% | 33% | 4.6% |
| Champagnole 8,036 · 11.2 mi | 50.7 | 31% | 1.5% | 7.9% |
| Hauts de Bienne 5,032 · 11.5 mi | 39.5 | 17% | 6.8% | 20% |
| Les Rousses 3,740 · 13.1 mi | 38.8 | 14% | 48% | 7.6% |
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 Châtelblanc
What is the population of Châtelblanc?
117 at INSEE’s 2023 census, about the same as in 2012 (116).
How old are Châtelblanc’s residents?
The median age is 41.4, younger than 70% of compared French towns. 15% are under 18 and 19% 65 or older.
How many second homes are there in Châtelblanc?
33, with occasional dwellings: 33% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Châtelblanc?
INSEE counts 5 immigrants (born abroad, not French at birth), 4.6% of residents, and 2 foreign nationals (1.5%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Châtelblanc?
€32,470 a year per consumption unit in 2023 (median of compared French towns €25,970). 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 October 30, 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.