Treteau ranks below 99% of compared French towns on flats: 1.3%
In the typical compared French town, nearly one in ten households are headed by a manager or professional; in Treteau, 2%. Here, 7.7% of residents are 15 to 24. 2.8% of households rent social housing (HLM), a lower share than in 95% of compared French towns. This Allier town is home to 520 residents in 250 households, by the 2023 Census.
Throughout this page, the Allier 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 Treteau
Fewer residents than in 2012
Treteau had 564 residents at the 2012 census and 520 in 2023, down 8%: slower growth than in 94% of compared French towns. Population ↓
An older town
Half of Treteau’s residents are under 52 and half over; the median of compared French towns is 44. 29% are 65 or older (France median 22%), 6.2% 80 or older. Ages ↓
Empty homes
The census found 36 homes empty (12%): for sale, to let, awaiting work or simply unused. Homes & cars ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
From 2012 to 2023, 94% of compared French towns grew faster than Treteau: −8%
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
Over those years, the median Allier town changed −1% and the median compared French town +5%.
Half of Treteau is over 52, older than 89% 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
■ Treteau 52. The median compared French town: 44.
Set against 22% in the typical compared French town, 29% of residents are 65 or over in Treteau.
Women and men · all residents
47% women, 53% men
About 115 men for every 100 women. Median share of women: Allier 52.6%, France 51.8%.
A lower share of couples with children than 76% of compared French towns, at 20%
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 Allier median and the France median
Living alone · share
The share of single-parent households is 7.8%, against 10% in the typical compared French town. Few places have as many one-person households: 37% here, more than in nearly three fifths of compared French towns. The comparison figure for couples with children is 25% in the typical compared French town. Average household size: 2.1 people.
Empty homes make up 12% in Treteau, more than in 87% 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
The share of second homes tops just over three quarters of compared French towns: 4.9%. Here, 6.7% of households have no car.
A median of €23,590 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.
Half of Treteau’s residents live in households with a standard of living below €23,590 a year per consumption unit, and half above: lower than in 76% of compared French towns.
Above 98% of compared French towns: 51% of households are headed by a retired person
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 Treteau, a fifth of households are headed by a manual worker, beside 14% in the typical compared French town. The benchmark for households headed by a retired person in the typical compared French town: 32%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
2.7% of residents are immigrants, fewer than in 85% 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 share of foreign nationals trails 80% of compared French towns: 1.9%. In the typical compared French town, 6.5% of residents are immigrants.
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 24% in Treteau, less than in 65% 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
The census found that 43% of residents 15 and over are married in Treteau. The comparison figure for single residents is 25% in the typical compared French town.
A lower share of graduates of higher education than 96% of compared French towns, at 16%
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
A quarter of adults out of school have no qualification, against 19% in the typical compared French town. By way of comparison, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
Ranked by age, 9th oldest of 41 French towns this size
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
Ages run from 37.2 in Villejust to 62.3 in Prayssac.
Treteau is younger than 3 of its 6 nearest neighbors
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Treteau | 52 | 29% | 4.9% | 2.7% |
| Varennes-sur-Allier 3,549 · 6.5 mi | 50.6 | 30% | 0.9% | 9.6% |
| Lapalisse 3,138 · 9.7 mi | 54.7 | 36% | 3% | 4.5% |
| Saint-Pourçain-sur-Sioule 4,884 · 11.5 mi | 50.6 | 31% | 3.1% | 2% |
| Saint-Germain-des-Fossés 3,579 · 12.1 mi | 45.9 | 25% | 3% | 4.3% |
| Dompierre-sur-Besbre 2,959 · 13.1 mi | 54.3 | 34% | 4.5% | 4.6% |
| Creuzier-le-Vieux 3,205 · 15.1 mi | 53.3 | 30% | 2.6% | 4.1% |
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 Treteau
What is the population of Treteau?
520 at INSEE’s 2023 census, 8% fewer than in 2012 (564).
How old are Treteau’s residents?
The median age is 52, older than 89% of compared French towns. 17% are under 18 and 29% 65 or older.
How many second homes are there in Treteau?
15, with occasional dwellings: 4.9% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Treteau?
INSEE counts 14 immigrants (born abroad, not French at birth), 2.7% of residents, and 10 foreign nationals (1.9%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Treteau?
€23,590 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.