Fewer households without a car than 97% of compared French towns: 3.5%
In Tréon, nearly one in ten homes are flats, beside 30% in the typical compared French town. Census figures put households in social housing at 9.5% in the town. 12% of households are headed by a manual worker, fewer than in 66% of compared French towns. The 2023 Census put the town’s population at 1,418, in 580 households.
Throughout this page, the Eure-et-Loir 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 Tréon
A town of families
34% of households are couples with children and 8.7% single parents with children; 18% of residents are under 15. Households ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Tréon changed by +4% from 2012 to 2023, slower than 53% 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, +3% to 2017 and +1% after, the town’s change compares with +5% for the median compared French town and −1% in Eure-et-Loir.
Tréon ranks above 74% of compared French towns on residents aged 15 to 24: 12%
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Tréon 43.7. The median compared French town: 44.
For Tréon, the census puts residents aged 65 and over at 22%. Half of the town’s residents are under 43.7, younger than in 52% of compared French towns. To put it in context, 11% of residents are 15 to 24 in the typical compared French town.
Women and men · all residents
49% women, 51% men
About an even split. Median share of women: Eure-et-Loir 52.3%, France 51.8%.
Above 91% of compared French towns: 34% of households are couples with children
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 Eure-et-Loir median and the France median
Living alone · share
The average household has 2.5 people. In the typical compared French town, couples with children come to 25%. One-person households are rarer here than in 95% of compared French towns. On top of that, the share of single-parent households is 8.7%, against 10% in the typical compared French town.
A higher share of second homes than 68% of compared French towns, at 3.6%
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
Recent arrivals (under two years) make up 7.3% of households; long-stayers (30 years or more) 25%. 5.5% of homes stand empty, a lower share than in 67% of compared French towns. In the typical compared French town, second homes come to 2.1%.
Median living standard: €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.
Half of residents live in households above €26,620 a year per consumption unit and half below; the level is higher than in 57% of compared French towns.
Tréon sits above 59% of compared French towns for households headed by a manager or professional (11%)
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
On the census count, a third of households are headed by a retired person. The comparison figure for households headed by a manager or professional is 9.4% in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
6.7% of Tréon’s 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.
That is higher than in 51% of compared French towns; the median compared commune in Eure-et-Loir has 7.5%. The census found that 3.6% of residents are foreign nationals in Tréon.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
A higher share of married residents than 83% of compared French towns, at 48%
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
The share of single residents trails 60% of compared French towns: 24%. Against that, 43% of residents 15 and over are married in the typical compared French town.
25% of adults out of school hold a higher-education qualification, below 70% 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
19% of adults out of school have no qualification. Graduates of higher education make up 30% in the typical compared French town.
Among 41 French towns of 1,418 to 2,582 people, the 15th 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.
Villejust is the youngest (37.2); Prayssac the oldest (62.3).
Median age: 3 of the 6 towns around Tréon 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 |
|---|---|---|---|---|
| Tréon | 43.7 | 22% | 3.6% | 6.7% |
| Vernouillet 12,310 · 3.5 mi | 40.7 | 21% | 1.4% | 19% |
| Dreux 31,543 · 4.6 mi | 37.2 | 17% | 1.5% | 22% |
| Saint-Rémy-sur-Avre 4,058 · 6.9 mi | 40.6 | 18% | 2.2% | 5.9% |
| Châteauneuf-en-Thymerais 2,641 · 7.7 mi | 44.6 | 26% | 1.6% | 5.3% |
| Saint-Lubin-des-Joncherets 4,116 · 8.4 mi | 44.6 | 24% | 2.8% | 5% |
| Nogent-le-Roi 4,021 · 9.3 mi | 44.8 | 23% | 3.1% | 8.8% |
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 Tréon
What is the population of Tréon?
1,418 at INSEE’s 2023 census, 4% more than in 2012 (1,363).
How old are Tréon’s residents?
The median age is 43.7, younger than 52% of compared French towns. 22% are under 18 and 22% 65 or older.
How many second homes are there in Tréon?
23, with occasional dwellings: 3.6% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Tréon?
INSEE counts 95 immigrants (born abroad, not French at birth), 6.7% of residents, and 51 foreign nationals (3.6%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Tréon?
€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 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.