Older than 94% of compared French towns: half of Izieu is over 54.7
Here 2.3% of homes are flats, where the figure in the typical compared French town is 30%. There were 110 households in Izieu at the 2023 Census, home to 225 residents. Households without a car account for 2.8%. Compared with other places, empty homes are scarce here: 4.2%, fewer than in 85% of compared French towns.
Throughout this page, the Ain 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 Izieu
One home in seven is a second home
The census counted 20 second homes and occasional dwellings in Izieu, 15% of its 130 homes: higher than in 91% 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 ↓
An older town
Half of Izieu’s residents are under 54.7 and half over; the median of compared French towns is 44. 30% are 65 or older (France median 22%), 5.2% 80 or older. Ages ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A larger share of second homes than 91% of compared French towns: 15%
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
Just over a quarter of households have been in place 30 years or more; 7.4% moved in within the last two years. Households in social housing are rarer here than in 99% of compared French towns. In the typical compared French town, 2.1% of homes are second homes.
Since 2012, Izieu has grown +7%, faster than 58% 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 years 2012 to 2017 brought +11%; 2017 to 2023, −4%. Over the whole period the median compared French town changed +5%, and the median Ain town +13%.
Izieu ranks above 86% of compared French towns on residents aged 65 and over: 30%
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Izieu 54.7. The median compared French town: 44.
Just over one in ten residents are 15 to 24 in the typical compared French town, against 8.3% in Izieu. On average, 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
49% women, 51% men
About an even split. Median share of women: Ain 51.0%, France 51.8%.
Below 62% of compared French towns: 23% 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 Ain median and the France median
Living alone · share
Each household has 2.1 people on average. As a reference point, a quarter of households are couples with children in the typical compared French town. Few places have so few single-parent households: 9.1% here, fewer than in 65% of compared French towns. 36% of households are one person living alone, against 35% in the typical compared French town.
Standard of living at the median: €29,140 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 €29,140 a year per consumption unit, the median standard of living here is higher than in 79% of compared French towns.
Above 71% of compared French towns: 36% 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
Compared with other places, households headed by a manager or professional are scarce here: 9.1%, fewer than in 52% of compared French towns. In the typical compared French town, households headed by a retired person come to 32%. The census found that 14% of households are headed by a manual worker in Izieu.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Fewer immigrants than 78% of compared French towns: 3.5%
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 Ain has 8.5%; immigrants here make up a share lower than in 78% of compared French towns. Immigrants: 6.5% in the typical compared French town, for comparison. Across Izieu, 1.7% 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 Izieu, 28% of residents 15 and over are single, more than in 70% 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: just over two fifths of the total. Against that, 25% of residents 15 and over are single in the typical compared French town.
25% of adults out of school hold a higher-education qualification, fewer than in 69% 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
About one in five: that is how common adults with no qualification are in Izieu (19%). The wider picture: 30% of adults out of school hold a higher-education qualification in the typical compared French town.
7th highest median age among 41 French towns of 225 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.
At the ends of the range sit Villejust (37.2), the youngest, and Prayssac (62.3), the oldest.
Every neighbor is younger than Izieu
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Izieu | 54.7 | 30% | 15% | 3.5% |
| Saint-Genix-les-Villages 3,095 · 3.5 mi | 44.5 | 23% | 6.5% | 4.4% |
| Aoste 2,876 · 4.1 mi | 41.5 | 20% | 2.1% | 7.9% |
| Les Avenières Veyrins-Thuellin 7,698 · 4.2 mi | 45.9 | 23% | 5.3% | 5.6% |
| Yenne 3,026 · 7 mi | 44.3 | 25% | 5.1% | 4.9% |
| Belley 9,388 · 7.7 mi | 46.5 | 26% | 3% | 13% |
| Dolomieu 3,173 · 7.8 mi | 44.9 | 21% | 4.5% | 3.1% |
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 Izieu
What is the population of Izieu?
225 at INSEE’s 2023 census, 7% more than in 2012 (211).
How old are Izieu’s residents?
The median age is 54.7, older than 94% of compared French towns. 14% are under 18 and 30% 65 or older.
How many second homes are there in Izieu?
20, with occasional dwellings: 15% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Izieu?
INSEE counts 8 immigrants (born abroad, not French at birth), 3.5% of residents, and 4 foreign nationals (1.7%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Izieu?
€29,140 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.