A median age of 34.8: Ségny is younger than 97% of compared French towns
Households headed by a retired person: 18% here and 32% in the typical compared French town. Ségny counted 2,941 residents and 1,210 households at the 2023 Census. The census found that 4.8% of households have no car in the town. Lower than in just over four fifths of compared French towns: 29% of households are one person living alone.
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 Ségny
Immigrants
INSEE counts 900 immigrants in Ségny (people born abroad who weren’t French at birth, whatever their nationality now): 30% of residents, against 8.5% for the median compared commune in Ain. 27% are foreign nationals. Immigrants and foreign nationals ↓
Growing fast
Ségny had 1,762 residents at the 2012 census and 2,941 in 2023, up 67%: faster growth than in 99% of compared French towns. Population ↓
A young town
Half of Ségny’s residents are under 34.8 and half over; the median of compared French towns is 44. 24% are under 15 and 11% are 65 or older. Ages ↓
A town of families
36% of households are couples with children and 7.4% single parents with children; 24% of residents are under 15. Households ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Growth of +67% since 2012 puts Ségny ahead of 99% 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, +17% to 2017 and +43% after, the town’s change compares with +5% for the median compared French town and +13% in Ain.
Residents aged 65 and over: 11%, a lower share than 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
■ Ségny 34.8. The median compared French town: 44.
The share of residents aged 15 to 24 is 8.7%, against 11% in the typical compared French town. Against that, 22% of residents are 65 or over 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%.
Ségny: 36% of households are couples with children, above 94% 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
Where one in ten households are single parents in the typical compared French town, Ségny has 7.4%. The benchmark for couples with children in the typical compared French town: 25%. Households here average 2.4 people each.
Ségny: 4.7% of homes are second homes, above 75% 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
Some nearly a quarter of households are newcomers of under two years, against 10% who have been there 30 years or more. In the typical compared French town, second homes come to 2.1%. Flats account for 50%. Households in social housing are more common here than in 60% of compared French towns.
€43,470 a year is the median standard of living here
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.
Per consumption unit, half of residents live on more than €43,470 a year: higher than in 99% of compared French towns. As for poverty, 11.0% of residents are below the line.
Above 76% of compared French towns: 15% of households are headed by a manager or professional
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
Ségny has more households headed by a manual worker than 56% of compared French towns, at 15%. The share of households headed by a manager or professional in the typical compared French town is 9.4%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
30% of residents are immigrants, a share 99% of compared French towns don’t reach
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.
27% of residents are foreign nationals, against 4.3% in the typical compared French town. For immigrants, the comparison in the typical compared French town is 6.5%.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Ségny ranks above 91% of compared French towns on married residents: 50%
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
With single residents at 22%, Ségny is behind 79% of compared French towns on that count. Typically, 43% of residents 15 and over are married in the typical compared French town.
Adults with no qualification make up 9.8% in Ségny, less than in 96% 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
The figure for graduates of higher education is 50% in Ségny and 30% in the typical compared French town. The comparison figure for adults with no qualification is 19% in the typical compared French town.
The youngest of 41 French towns of 2,911 to 2,972 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.
Ages run from 34.8 in Ségny to 58.7 in Lalinde.
Nearby, 5 of 6 towns have older populations than Ségny
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Ségny | 34.8 | 11% | 4.7% | 30% |
| Cessy 5,832 · 1.6 mi | 36.9 | 10% | 4.4% | 22% |
| Ornex 5,082 · 1.6 mi | 37.9 | 12% | 4.8% | 38% |
| Gex 13,627 · 2.7 mi | 35 | 10% | 6.2% | 23% |
| Prévessin-Moëns 9,153 · 2.7 mi | 36.5 | 10% | 11% | 37% |
| Ferney-Voltaire 12,094 · 3.3 mi | 36.7 | 12% | 17% | 46% |
| Saint-Genis-Pouilly 14,432 · 3.9 mi | 33.9 | 9% | 6.2% | 41% |
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 Ségny
What is the population of Ségny?
2,941 at INSEE’s 2023 census, 67% more than in 2012 (1,762).
How old are Ségny’s residents?
The median age is 34.8, younger than 97% of compared French towns. 28% are under 18 and 11% 65 or older.
How many second homes are there in Ségny?
65, with occasional dwellings: 4.7% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Ségny?
INSEE counts 900 immigrants (born abroad, not French at birth), 30% of residents, and 790 foreign nationals (27%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Ségny?
€43,470 a year per consumption unit in 2023 (median of compared French towns €25,970); 11.0% of residents live below the poverty line. 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.