A median age of 55.7: Marignieu is older than 95% of compared French towns
In the typical compared French town, the share of households without a car is 11%; Marignieu has 2.4%. This Ain town had 162 residents in 84 households at the 2023 census. The share of households headed by a retired person stands at 44%. Households in social housing are rarer here than in 99% 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 Marignieu
An older town
Half of Marignieu’s residents are under 55.7 and half over; the median of compared French towns is 44. 33% are 65 or older (France median 22%), 9.5% 80 or older. Ages ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
+4% since 2012, a pace below 54% 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
Against +5% for the median compared French town and +13% for the median Ain town, the change came in two steps: +10% from 2012 to 2017, then −6% to 2023.
Residents aged 15 to 24 make up 3.8% in Marignieu, less than in 99% 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
■ Marignieu 55.7. The median compared French town: 44.
Here a third of residents are 65 or over, where the figure in the typical compared French town is 22%. To put it in context, 11% of residents are 15 to 24 in the typical compared French town.
Women and men · all residents
51% women, 49% men
About 95 men for every 100 women. Median share of women: Ain 51.0%, France 51.8%.
Single-parent households: 6.3%, a lower share than 95% 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
The typical household size is 1.9 people. The usual figure: 10% of households are single parents in the typical compared French town. Census figures put couples with children at 19% in Marignieu. 38% of households are one person living alone, a higher share than in 60% of compared French towns.
Only 8.1% of homes are flats in Marignieu
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 7.3% of households are newcomers of under two years, against 26% who have been there 30 years or more. Second homes make up about one in 12 here (8.2%). Marignieu has more empty homes than 74% of compared French towns, at 9.1%.
The median resident lives on €27,590 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.
At €27,590 a year per consumption unit, the median standard of living here is higher than in 67% of compared French towns.
Only 6.3% of households are headed by a manual worker in Marignieu
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 the typical compared French town, the share of households headed by a manager or professional is 9.4%; Marignieu has 19%. As a yardstick, 14% of households are headed by a manual worker in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Marignieu ranks below 75% of compared French towns on immigrants: 3.8%
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 62% of compared French towns: 3.2%. The median compared commune in Ain has 8.5%; immigrants here make up a share lower than in three quarters of compared French towns. The benchmark for immigrants in the typical compared French town: 6.5%.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Fewer single residents than 99% of compared French towns: 16%
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: 54% here and 43% in the typical compared French town. The benchmark for single residents in the typical compared French town: 25%.
Marignieu sits below 98% of compared French towns for adults with no qualification (8.7%)
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
Graduates of higher education: 28%, below 56% of compared French towns. Adults with no qualification make up 19% in the typical compared French town.
41 French towns of 162 to 2,582 people: this is the 5th oldest
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.
Marignieu is older 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 |
|---|---|---|---|---|
| Marignieu | 55.7 | 33% | 8.2% | 3.8% |
| Belley 9,388 · 3.2 mi | 46.5 | 26% | 3% | 13% |
| Culoz-Béon 3,453 · 4.7 mi | 43.5 | 23% | 6.2% | 15% |
| Yenne 3,026 · 7 mi | 44.3 | 25% | 5.1% | 4.9% |
| La Biolle 2,948 · 10.3 mi | 40 | 17% | 2.8% | 4.9% |
| Entrelacs 6,461 · 10.6 mi | 43 | 18% | 4.2% | 4.1% |
| Grésy-sur-Aix 4,740 · 11.5 mi | 43.4 | 19% | 2.7% | 6.9% |
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 Marignieu
What is the population of Marignieu?
162 at INSEE’s 2023 census, 4% more than in 2012 (156).
How old are Marignieu’s residents?
The median age is 55.7, older than 95% of compared French towns. 11% are under 18 and 33% 65 or older.
How many second homes are there in Marignieu?
8, with occasional dwellings: 8.2% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Marignieu?
INSEE counts 6 immigrants (born abroad, not French at birth), 3.8% of residents, and 5 foreign nationals (3.2%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Marignieu?
€27,590 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.