Fewer one-person households than 94% of compared French towns: 25%
With a median age of 47.2, Gergy is older than 70% of compared French towns. On the census count, nearly one in ten homes are flats. The town counted 2,566 residents and 1,130 households at the 2023 Census. Compared with 11% in the typical compared French town, 5.7% of households have no car here.
Throughout this page, the Saône-et-Loire 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.
A change of ±0% since 2012 leaves Gergy behind 70% 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
Here the change came as −1% to 2017, then +1% to 2023. Medians for comparison: +5% across compared French towns, −3% in Saône-et-Loire.
A smaller share of residents aged 15 to 24 than 80% of compared French towns: 9.1%
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Gergy 47.2. The median compared French town: 44.
Set against 22% in the typical compared French town, nearly a quarter of residents are 65 or over in Gergy.
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Saône-et-Loire 52.3%, France 51.8%.
Gergy sits above 69% of compared French towns for couples with children (29%)
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 Saône-et-Loire median and the France median
Living alone · share
Households average 2.3 people. For comparison, a quarter of households are couples with children in the typical compared French town. Lower than in 76% of compared French towns: 8.4% of households are single parents.
A smaller share of households in social housing than 86% of compared French towns: 5%
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
Empty homes: 5.2% here and 6.7% in the typical compared French town. As a yardstick, just over one in ten households rent social housing (HLM) in the typical compared French town. Put another way, about one in 37: 2.7% of homes are second homes.
Standard of living at the median: €27,460 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.
Per consumption unit, half of residents live on more than €27,460 a year: higher than in 66% of compared French towns. Under the poverty line sit 6.0% of residents.
Gergy: 20% of households are headed by a manual worker, above 83% 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
Set against 9.4% in the typical compared French town, 11% of households are headed by a manager or professional in Gergy. In the typical compared French town, the share of households headed by a manual worker is 14%. The share of households headed by a retired person stands at 34%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
A lower share of immigrants than 80% of compared French towns, at 3.1%
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 77% of compared French towns: 2.1%. Set beside that, 6.5% of residents are immigrants 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.
Fewer single residents than 98% of compared French towns: 18%
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
Here half of residents 15 and over are married, where the figure in the typical compared French town is 43%. The share of single residents in the typical compared French town is 25%.
A lower share of graduates of higher education than 64% of compared French towns, at 26%
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
Put another way, about one in six: 18% of adults out of school have no qualification. In the typical compared French town, the share of graduates of higher education is 30%.
12th highest median age among 41 French towns of 2,540 to 2,599
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 Eymet (61.2), the oldest.
Around Gergy, 3 of 6 towns have a higher median age
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Gergy | 47.2 | 24% | 2.7% | 3.1% |
| Champforgeuil 2,637 · 6.2 mi | 42.1 | 23% | 1.3% | 11% |
| Chalon-sur-Saône 45,102 · 7 mi | 41.5 | 23% | 4% | 14% |
| Saint-Marcel 6,211 · 7 mi | 47.3 | 24% | 1.1% | 5.2% |
| Châtenoy-le-Royal 6,267 · 8.1 mi | 45.8 | 27% | 0.9% | 9% |
| Saint-Rémy 6,410 · 9 mi | 49.6 | 29% | 1.1% | 6.5% |
| Chagny 5,350 · 9.1 mi | 48 | 25% | 1.6% | 5.8% |
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 Gergy
What is the population of Gergy?
2,566 at INSEE’s 2023 census, about the same as in 2012 (2,568).
How old are Gergy’s residents?
The median age is 47.2, older than 70% of compared French towns. 19% are under 18 and 24% 65 or older.
How many second homes are there in Gergy?
33, with occasional dwellings: 2.7% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Gergy?
INSEE counts 81 immigrants (born abroad, not French at birth), 3.1% of residents, and 54 foreign nationals (2.1%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Gergy?
€27,460 a year per consumption unit in 2023 (median of compared French towns €25,970); 6.0% 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 9, 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.