A town of second homes: 33% of its homes
Residents aged 15 to 24 make up 4.3%, against 11% in the typical compared French town. Onoz had 70 residents in 37 households at the 2023 census. Nearly one in ten homes are flats, or about one in 12. Households in social housing are rarer here than in 99% of compared French towns.
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 Onoz
One home in three is a second home
The census counted 20 second homes and occasional dwellings in Onoz, 33% of its 61 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 ↓
Fewer residents than in 2012
Onoz had 93 residents at the 2012 census and 70 in 2023, down 25%: slower growth than in 99% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
5.4% of households have no car, 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
Newcomers of less than two years account for 2.7% of households, residents of 30 years or more for 24%. The benchmark for households without a car in the typical compared French town: 11%. Nothing unusual on empty homes: 6.6%, close to the figure in the typical compared French town.
A change of −25% since 2012 leaves Onoz behind 99% 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
In two steps, −23% to 2017 and −3% after, the town’s change compares with +5% for the median compared French town and −4% in Jura.
A median age of 48: Onoz is older than 74% 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
■ Onoz 48. The median compared French town: 44.
By its share of residents aged 65 and over (24%), Onoz is above 63% of compared French towns.
Women and men · all residents
47% women, 53% men
About 112 men for every 100 women. Median share of women: Jura 52.0%, France 51.8%.
Onoz: 43% of households are one person living alone, above 79% 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 Jura median and the France median
Living alone · share
The typical household size is 1.9 people. Single-parent households are rarer here than in 99% of compared French towns. By way of comparison, 35% of households are one person living alone in the typical compared French town. Couples with children come to 29% in Onoz, about three in ten.
A higher share of households headed by a manual worker than 99% of compared French towns, at 43%
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
Where 32% of households are headed by a retired person in the typical compared French town, Onoz has 29%. In the typical compared French town, the share of households headed by a manual worker is 14%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
2.9% of residents are immigrants, below 83% 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 lower than in 83% of compared French towns. Immigrants: 6.5% in the typical compared French town, for comparison. On the census count, 1.4% of residents are foreign nationals.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
In Onoz, 20% of residents 15 and over are single, fewer than in 93% 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
Locally, 43% of residents 15 and over are married. In the typical compared French town, the share of single residents is 25%.
Fewer graduates of higher education than 81% of compared French towns: 22%
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 the typical compared French town, the share of adults with no qualification is 19%; Onoz has 22%. As a reference point, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
Among 41 French towns of 70 to 2,582 people, the 15th 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.
At the ends of the range sit Villejust (37.2), the youngest, and Prayssac (62.3), the oldest.
Nearby, 1 of 6 towns have older populations than Onoz
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Onoz | 48 | 24% | 33% | 2.9% |
| Saint-Claude 8,386 · 10.7 mi | 48.5 | 26% | 5.1% | 20% |
| Arbent 3,555 · 12 mi | 44.1 | 22% | 1% | 24% |
| Oyonnax 22,480 · 13.6 mi | 41.1 | 19% | 2.1% | 33% |
| Bellignat 3,525 · 14.3 mi | 40.8 | 21% | 1.7% | 26% |
| Lons-le-Saunier 16,618 · 15.9 mi | 47.2 | 28% | 5.4% | 12% |
| Montmorot 3,261 · 16.6 mi | 46.9 | 27% | 3.5% | 5.6% |
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 Onoz
What is the population of Onoz?
70 at INSEE’s 2023 census, 25% fewer than in 2012 (93).
How old are Onoz’s residents?
The median age is 48, older than 74% of compared French towns. 14% are under 18 and 24% 65 or older.
How many second homes are there in Onoz?
20, with occasional dwellings: 33% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Onoz?
INSEE counts 2 immigrants (born abroad, not French at birth), 2.9% of residents, and 1 foreign nationals (1.4%). 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.