Half of Cormontreuil is over 50.9, older than 86% of compared French towns
42% of households are headed by a retired person; in the typical compared French town the figure is 32%. Empty homes account for 4.9%. One-person households are rarer here than in nearly two thirds of compared French towns. Census day 2023: 6,534 residents and 2,940 households in Cormontreuil.
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 Cormontreuil
An older town
Half of Cormontreuil’s residents are under 50.9 and half over; the median of compared French towns is 44. 31% are 65 or older (France median 22%), 9.2% 80 or older. Ages ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Cormontreuil grew +8% from 2012 to 2023, ahead of 63% 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 −2% for the median Marne town, the change came in two steps: +8% from 2012 to 2017, then ±0% to 2023.
Above 88% of compared French towns: 31% of residents are 65 or over
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Cormontreuil 50.9. The median compared French town: 44.
The figure for residents aged 15 to 24 is 8.8% in Cormontreuil and 11% in the typical compared French town. Measured more widely, 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
54% women, 46% men
About 86 men for every 100 women. Median share of women: Marne 52.7%, France 51.8%. Women live longer than men, so towns with many older residents have more women.
A lower share of couples with children than 62% of compared French towns, at 23%
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
Cormontreuil sits close to the norm on single-parent households: 9.3%, about the same as in the typical compared French town. On average, 2.2 people share a household. Elsewhere, 25% of households are couples with children in the typical compared French town.
22% of households rent social housing (HLM), more than in 82% 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
0.8% of homes are second homes (typical compared French town: 2.1%). On average, 12% of households rent social housing (HLM) in the typical compared French town. In Cormontreuil, nearly one in ten households have no car.
Median standard of living: €29,150 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.
At €29,150 a year per consumption unit, the median standard of living here is higher than in 79% of compared French towns. The poverty rate is 7.0%.
Households headed by a manual worker: 9%, a lower share than 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
In the typical compared French town, the share of households headed by a manager or professional is 9.4%; Cormontreuil has 12%. As a reference point, 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).
Foreign nationals make up 2.5% in Cormontreuil, less than in 72% of compared French towns
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.
Against a figure of 6.5% in the typical compared French town, the share of immigrants in Cormontreuil comes in at 4.9%. In the typical compared French town, 4.3% of residents are foreign nationals.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Cormontreuil sits above 92% of compared French towns for 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%, Cormontreuil is behind 82% of compared French towns on that count. By way of comparison, 43% of residents 15 and over are married in the typical compared French town.
Cormontreuil sits above 63% of compared French towns for graduates of higher education (34%)
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
About one in five: that is how common adults with no qualification are in Cormontreuil (20%). In the typical compared French town, graduates of higher education come to 30%.
5th highest median age among 41 French towns of 6,486 to 6,585
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
Thoiry is the youngest (39); Gueugnon the oldest (58).
Every neighbor is younger than Cormontreuil
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Cormontreuil | 50.9 | 31% | 0.8% | 4.9% |
| Reims 177,674 · 2.3 mi | 35.1 | 17% | 3.8% | 14% |
| Bezannes 5,039 · 2.4 mi | 31.7 | 15% | 2.6% | 7% |
| Tinqueux 10,771 · 3.2 mi | 44.4 | 24% | 0.8% | 6.1% |
| Saint-Brice-Courcelles 3,566 · 4.1 mi | 47.2 | 25% | 0.6% | 3.9% |
| Bétheny 6,975 · 4.4 mi | 47.6 | 27% | 0.8% | 4.2% |
| Witry-lès-Reims 4,950 · 5.7 mi | 44 | 20% | 0.6% | 3.6% |
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 Cormontreuil
What is the population of Cormontreuil?
6,534 at INSEE’s 2023 census, 8% more than in 2012 (6,057).
How old are Cormontreuil’s residents?
The median age is 50.9, older than 86% of compared French towns. 18% are under 18 and 31% 65 or older.
How many second homes are there in Cormontreuil?
23, with occasional dwellings: 0.8% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Cormontreuil?
INSEE counts 320 immigrants (born abroad, not French at birth), 4.9% of residents, and 160 foreign nationals (2.5%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Cormontreuil?
€29,150 a year per consumption unit in 2023 (median of compared French towns €25,970); 7.0% 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.