Blyes is younger than 96% of compared French towns: a median age of 35.1
The figure for flats is 8.1% in Blyes and 30% in the typical compared French town. Lower than in 93% of compared French towns: 3.3% of homes stand empty. Census day 2023: 1,401 residents and 530 households locally. One-person households come to 20% locally, about two in ten.
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 Blyes
A town of families
46% of households are couples with children and 9.4% single parents with children; 24% of residents are under 15. Households ↓
Growing fast
Blyes had 915 residents at the 2012 census and 1,401 in 2023, up 53%: faster growth than in 99% of compared French towns. Population ↓
A young town
Half of Blyes’ residents are under 35.1 and half over; the median of compared French towns is 44. 24% are under 15 and 9.3% are 65 or older. Ages ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
+53% since 2012, a pace 99% of compared French towns didn’t match
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 median Ain town changed +13% and the median compared French town +5%; here the first five years brought +10% and the next six +39%.
A smaller share of residents aged 65 and over than 99% of compared French towns: 9.3%
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Blyes 35.1. The median compared French town: 44.
Residents aged 15 to 24: 10% here and 11% in the typical compared French town. The wider picture: 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
48% women, 52% men
About 109 men for every 100 women. Median share of women: Ain 51.0%, France 51.8%.
In Blyes, 46% of households are couples with children, more than in 99% 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 Ain median and the France median
Living alone · share
Average household size: 2.6 people. On single-parent households, Blyes sits lower than three fifths of compared French towns: 9.4%. The share of couples with children in the typical compared French town is 25%.
Blyes ranks below 98% of compared French towns on households without a car: 3.2%
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
Some 13% of households are newcomers of under two years, against 11% who have been there 30 years or more. Households in social housing: 7.9% of the total. On second homes, Blyes sits higher than 57% of compared French towns: 2.5%.
Per consumption unit, the median standard of living is €29,350 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 Blyes’ residents live in households with a standard of living below €29,350 a year per consumption unit, and half above: higher than in 81% of compared French towns.
Households headed by a retired person make up 15% in Blyes, less than in 99% 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
The share of households headed by a manual worker is 17%, against 14% in the typical compared French town. The wider picture: nearly a third of households are headed by a retired person in the typical compared French town. Households headed by a manager or professional are more common here than in 81% of compared French towns.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
A smaller share of foreign nationals than 73% of compared French towns: 2.4%
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.
Immigrants make up 4.5%, against 6.5% in the typical compared French town. The median compared commune in Ain has 8.5%; immigrants here make up a share lower than in 69% of compared French towns. Set beside that, 4.3% of residents are foreign nationals 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.
More married residents than 87% of compared French towns: 49%
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
In the typical compared French town, 25% of residents 15 and over are single; in Blyes, 21%. The comparison figure for married residents is 43% in the typical compared French town.
Blyes ranks below 90% of compared French towns on adults with no qualification: 12%
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
40% of adults out of school hold a higher-education qualification; in the typical compared French town the figure is 30%. Typically, 19% of adults out of school have no qualification in the typical compared French town.
The youngest of 41 French towns of 1,401 to 2,582 people
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
Blyes is the youngest (35.1); Prayssac the oldest (62.3).
Blyes is younger than every town around it
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Blyes | 35.1 | 9.3% | 2.5% | 4.5% |
| Saint-Maurice-de-Gourdans 2,903 · 3.7 mi | 41.6 | 16% | 3.7% | 2.8% |
| Meximieux 8,247 · 5.1 mi | 39 | 18% | 2.2% | 7.5% |
| Loyettes 3,554 · 5.2 mi | 37.5 | 15% | 1.8% | 7.3% |
| Villieu-Loyes-Mollon 3,849 · 5.5 mi | 41.1 | 17% | 3.2% | 3.4% |
| Lagnieu 7,411 · 5.6 mi | 43.1 | 23% | 2.1% | 7.3% |
| Béligneux 3,535 · 5.8 mi | 36.7 | 16% | 1.3% | 6.4% |
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 Blyes
What is the population of Blyes?
1,401 at INSEE’s 2023 census, 53% more than in 2012 (915).
How old are Blyes’ residents?
The median age is 35.1, younger than 96% of compared French towns. 29% are under 18 and 9.3% 65 or older.
How many second homes are there in Blyes?
14, with occasional dwellings: 2.5% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Blyes?
INSEE counts 63 immigrants (born abroad, not French at birth), 4.5% of residents, and 33 foreign nationals (2.4%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Blyes?
€29,350 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.