Flats make up 4.5% in Onans, less than in 96% of compared French towns
The share of households without a car trails 88% of compared French towns: 5%. Census day 2023: 368 residents and 160 households in Onans. Empty homes: 3.4% of the total. Fewer residents aged 15 to 24 than in 95% of compared French towns: 7.6%.
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.
−3% since 2012: slower 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 first five years brought −8%; the six to 2023, +5%.
Half of Onans is over 50, older than 83% 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
■ Onans 50. The median compared French town: 44.
In the typical compared French town, the share of residents aged 65 and over is 22%; Onans has 28%.
Women and men · all residents
51% women, 49% men
About 96 men for every 100 women. Median share of women: Doubs 51.3%, France 51.8%.
Fewer one-person households than 74% of compared French towns: 31%
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
Each household has 2.3 people on average. 21% of households are couples with children, a lower share than in 70% of compared French towns. The wider picture: just over a third of households are one person living alone in the typical compared French town. At 9.1%, single-parent households sit close to the figure in the typical compared French town.
Onans ranks above 79% of compared French towns on second homes: 5.6%
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
In the last two years, 3.1% of households moved in; at the other end, 36% have stayed 30 years or more. Households in social housing are rarer here than in 99% of compared French towns. As a yardstick, 2.1% of homes are second homes in the typical compared French town.
Per consumption unit, the median standard of living is €26,620 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 €26,620 a year per consumption unit, the median standard of living here is higher than in 57% of compared French towns.
9% of households are headed by a manual worker, fewer than in 82% 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
In the typical compared French town, the share of households headed by a retired person is 32%; Onans has 37%. By way of comparison, 14% of households are headed by a manual worker in the typical compared French town. Households headed by a manager or professional account for 12%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Below 87% of compared French towns: 2.5% of residents are immigrants
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.
Foreign nationals make up 1.4%, against 4.3% in the typical compared French town. Elsewhere, 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.
Single residents: 17%, a lower share than 99% of compared French towns
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
Where 43% of residents 15 and over are married in the typical compared French town, Onans has 52%. The share of single residents in the typical compared French town is 25%.
Onans sits below 72% of compared French towns for adults with no qualification (15%)
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
Lower than in 55% of compared French towns: 29% of adults out of school hold a higher-education qualification. The benchmark for adults with no qualification in the typical compared French town: 19%.
14th highest median age among 41 French towns of 368 to 2,582
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
Villejust is the youngest (37.2); Prayssac the oldest (62.3).
Median age: 1 of the 6 towns around Onans 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 |
|---|---|---|---|---|
| Onans | 50 | 28% | 5.6% | 2.5% |
| L'Isle-sur-le-Doubs 2,780 · 4.1 mi | 52.1 | 30% | 2.1% | 3.4% |
| Bavans 3,582 · 5.9 mi | 48.9 | 26% | 0.9% | 5.1% |
| Voujeaucourt 3,174 · 7.7 mi | 47.4 | 23% | 0.7% | 6% |
| Héricourt 10,621 · 8.5 mi | 45.5 | 24% | 1% | 8.8% |
| Montbéliard 24,672 · 8.7 mi | 41.2 | 24% | 2.5% | 20% |
| Bethoncourt 5,308 · 9.1 mi | 41.1 | 23% | 0.8% | 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 Onans
What is the population of Onans?
368 at INSEE’s 2023 census, 3% fewer than in 2012 (379).
How old are Onans’ residents?
The median age is 50, older than 83% of compared French towns. 21% are under 18 and 28% 65 or older.
How many second homes are there in Onans?
10, with occasional dwellings: 5.6% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Onans?
INSEE counts 9 immigrants (born abroad, not French at birth), 2.5% of residents, and 5 foreign nationals (1.4%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Onans?
€26,620 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 November 4, 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.