Couples with children: 37%, a higher share than 95% of compared French towns
The share of flats is 2%, against 30% in the typical compared French town. At the 2023 Census Congy was home to 257 people in 110 households. Across Congy, 32% of households are headed by a manual worker. This Marne town has fewer households without a car than 84% of compared French towns, at 5.5%.
Throughout this page, the Marne 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 Congy
One home in nine is a second home
The census counted 16 second homes and occasional dwellings in Congy, 11% of its 150 homes: higher than in 89% of compared French towns. 94% of them are houses. Their owners live elsewhere, so they aren’t in the population figures on this page. Homes & cars ↓
A town of families
37% of households are couples with children and 0% single parents with children; 18% of residents are under 15. Households ↓
Empty homes
The census found 23 homes empty (16%): for sale, to let, awaiting work or simply unused. Homes & cars ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A higher share of empty homes than 96% of compared French towns, at 16%
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
In the last two years, 9.3% of households moved in; at the other end, 30% have stayed 30 years or more. Second homes are more common here than in 89% of compared French towns. For comparison, 6.7% of homes stand empty in the typical compared French town.
Growth of +9% since 2012 puts Congy ahead of 68% 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
From 2012 to 2017 the population moved +11%, and from 2017 to 2023 −2%; the median compared French town changed +5% and the median Marne town −2%.
19% of residents are 65 or over, below 70% 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
■ Congy 42.9. The median compared French town: 44.
The share of residents aged 15 to 24 is 10%, against 11% in the typical compared French town. Across the comparison, 22% of residents are 65 or over in the typical compared French town. With a median age of 42.9, Congy is younger than nearly three fifths of compared French towns.
Women and men · all residents
52% women, 48% men
About 91 men for every 100 women. Median share of women: Marne 52.7%, France 51.8%.
Congy sits below 88% of compared French towns for one-person households (27%)
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 Marne median and the France median
Living alone · share
Single-parent households are rarer here than in 99% of compared French towns. The wider picture: 35% of households are one person living alone in the typical compared French town. Households average 2.4 people.
Median standard of living: €27,210 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 Congy’s residents live in households with a standard of living below €27,210 a year per consumption unit, and half above: higher than in 63% of compared French towns.
Fewer households headed by a manager or professional than 89% of compared French towns: 4.6%
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
With households headed by a retired person at 27%, Congy is behind 77% of compared French towns on that count. To put it in context, nearly one in ten households are headed by a manager or professional in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
A smaller share of immigrants than 92% of compared French towns: 2%
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.
In the typical compared French town, 4.3% of residents are foreign nationals; in Congy, 1.6%. The wider picture: 6.5% of residents are immigrants in the typical compared French town. The median compared commune in Marne has 4.9%; immigrants here make up a share lower than in 92% of compared French towns.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Below 86% of compared French towns: 21% of residents 15 and over are single
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: 43% of the total. By way of comparison, 25% of residents 15 and over are single in the typical compared French town.
15% of adults out of school hold a higher-education qualification, below 97% 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 share of adults with no qualification tops 74% of compared French towns: 24%. In the typical compared French town, the share of graduates of higher education is 30%.
The 11th youngest of 41 French towns of 257 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.
The youngest is Villejust (37.2), the oldest Prayssac (62.3).
Every neighbor is older than Congy
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Congy | 42.9 | 19% | 11% | 2% |
| Blancs-Coteaux 3,080 · 9 mi | 51.4 | 30% | 3.9% | 1.9% |
| Sézanne 4,576 · 10.7 mi | 50.7 | 30% | 3% | 8.3% |
| Montmirail 3,535 · 12.9 mi | 51.3 | 32% | 3.4% | 5.2% |
| Épernay 22,174 · 13.7 mi | 44 | 23% | 5.2% | 11% |
| Aÿ-Champagne 5,103 · 15.8 mi | 51.9 | 30% | 3.2% | 2.5% |
| Dormans 2,890 · 16.9 mi | 48.9 | 28% | 3.7% | 4.9% |
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 Congy
What is the population of Congy?
257 at INSEE’s 2023 census, 9% more than in 2012 (235).
How old are Congy’s residents?
The median age is 42.9, younger than 59% of compared French towns. 22% are under 18 and 19% 65 or older.
How many second homes are there in Congy?
16, with occasional dwellings: 11% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Congy?
INSEE counts 5 immigrants (born abroad, not French at birth), 2% of residents, and 4 foreign nationals (1.6%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Congy?
€27,210 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.