Onjon sits above 92% of compared French towns for couples with children (35%)
The share of households headed by a manual worker tops 98% of compared French towns: 26%. Put another way, about one in 14: 7.1% of households have no car. Higher than in 78% of compared French towns: 5.3% of homes are second homes. Onjon had 258 residents in 110 households at the 2023 census.
Throughout this page, the Aube 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 Onjon
A town of families
35% of households are couples with children and 0% single parents with children; 18% of residents are under 15. Households ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Onjon’s population moved +3% on 2012, less than in 57% 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, ±0% to 2017 and +3% after, the town’s change compares with +5% for the median compared French town and +2% in Aube.
Onjon sits below 83% of compared French towns for residents aged 15 to 24 (8.9%)
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Onjon 45.2. The median compared French town: 44.
Half of Onjon’s residents are over 45.2, older than in 58% of compared French towns. Across the comparison, 11% of residents are 15 to 24 in the typical compared French town. Put another way, about one in four: nearly a quarter of residents are 65 or over.
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Aube 52.1%, France 51.8%.
In Onjon, 30% of households are one person living alone, fewer than in 75% 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 Aube median and the France median
Living alone · share
Single-parent households are rarer here than in 99% of compared French towns. In the typical compared French town, 35% of households are one person living alone. A household here holds 2.3 people on average.
Empty homes: 8.4%, a higher share than 68% 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
Car-free households: one in 14, where the median compared French town has 11%. The usual figure: 6.7% of homes stand empty in the typical compared French town. Flats are rarer here than in 99% of compared French towns.
Per consumption unit, the median standard of living is €24,640 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.
The midpoint of living standards here is €24,640 a year per consumption unit, lower than in 65% of compared French towns.
4.3% of households are headed by a manager or professional, below 91% 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
Nearly two in five households are headed by a retired person, against 32% in the typical compared French town. The usual figure: nearly one in ten households are headed by a manager or professional in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
1.6% of residents are immigrants, fewer than in 96% 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 Aube has 9.2%; immigrants here make up a share lower than in 96% of compared French towns. The census found that 0.4% of residents are foreign nationals in Onjon. Typically, 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 make up 19% in Onjon, less than in 95% 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
Married residents: 49% here and 43% in the typical compared French town. Set beside that, 25% of residents 15 and over are single in the typical compared French town.
A smaller share of graduates of higher education than 69% of compared French towns: 25%
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
Locally, 18% of adults out of school have no qualification. Elsewhere, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
20th lowest median age among 41 French towns of 258 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).
A younger town than 4 of the 6 around it: Onjon
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Onjon | 45.2 | 23% | 5.3% | 1.6% |
| Pont-Sainte-Marie 5,249 · 9.7 mi | 43.8 | 26% | 0.8% | 13% |
| Saint-Parres-aux-Tertres 3,223 · 10.1 mi | 47.7 | 28% | 1.7% | 9.1% |
| Brienne-le-Château 2,672 · 11.3 mi | 53.3 | 32% | 2.3% | 2.5% |
| Arcis-sur-Aube 2,785 · 11.5 mi | 46 | 28% | 2.2% | 5.5% |
| Troyes 62,088 · 11.6 mi | 36.5 | 19% | 6.2% | 16% |
| Saint-Julien-les-Villas 6,760 · 11.8 mi | 47.5 | 25% | 1.3% | 8.6% |
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 Onjon
What is the population of Onjon?
258 at INSEE’s 2023 census, 3% more than in 2012 (250).
How old are Onjon’s residents?
The median age is 45.2, older than 58% of compared French towns. 21% are under 18 and 23% 65 or older.
How many second homes are there in Onjon?
7, with occasional dwellings: 5.3% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Onjon?
INSEE counts 4 immigrants (born abroad, not French at birth), 1.6% of residents, and 1 foreign nationals (0.4%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Onjon?
€24,640 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.