Half of Montmirail is over 51.3, older than 87% of compared French towns
In the typical compared French town, 25% of households are couples with children; in Montmirail, 17%. More households headed by a retired person than in 80% of compared French towns: 39%. There were 1,670 households locally at the 2023 Census, home to 3,535 residents. Just over a fifth of homes are flats.
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 Montmirail
An older town
Half of Montmirail’s residents are under 51.3 and half over; the median of compared French towns is 44. 32% are 65 or older (France median 22%), 11% 80 or older. Ages ↓
Fewer residents than in 2012
Montmirail had 3,742 residents at the 2012 census and 3,535 in 2023, down 6%: slower growth than in 90% of compared French towns. Population ↓
Empty homes
The census found 240 homes empty (12%): for sale, to let, awaiting work or simply unused. Homes & cars ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Montmirail changed by −6% from 2012 to 2023, behind 90% 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
Between 2012 and 2017 the population moved −4%, then −2% to 2023.
A larger share of residents aged 65 and over than 90% of compared French towns: 32%
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Montmirail 51.3. The median compared French town: 44.
Nearly one in ten residents are 15 to 24 (typical compared French town: 11%). In the typical compared French town, 22% of residents are 65 or over.
Women and men · all residents
53% women, 47% men
About 90 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 larger share of single-parent households than 84% of compared French towns: 13%
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
42% of households are one person living alone (typical compared French town: 35%). In the typical compared French town, 10% of households are single parents.
Montmirail ranks above 89% of compared French towns on empty homes: 12%
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
One household in seven has no car (median compared French town: 11%). As a yardstick, 6.7% of homes stand empty in the typical compared French town. In Montmirail, 16% of households rent social housing (HLM). This Marne town has more households without a car than 64% of compared French towns, at 14%.
The median resident lives on €23,210 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.
The median standard of living in Montmirail is €23,210 a year per consumption unit: lower than in 80% of compared French towns. Poverty touches 19.0% of residents.
Montmirail: 18% of households are headed by a manual worker, above 73% 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
Households headed by a manager or professional make up 6.7%, against 9.4% in the typical compared French town. In the typical compared French town, 14% of households are headed by a manual worker.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Montmirail sits below 61% of compared French towns for immigrants (5.2%)
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.
The median compared commune in Marne has 4.9%; immigrants here make up a share lower than in just over three fifths of compared French towns. On average, 6.5% of residents are immigrants in the typical compared French town. 4.3% of residents are foreign nationals, or about one in 23.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Married residents make up 38% in Montmirail, less than in 80% of compared French towns
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
On the census count, just over a quarter of residents 15 and over are single. Married residents: 43% in the typical compared French town, for comparison.
A larger share of adults with no qualification than 97% of compared French towns: 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
Graduates of higher education: 17%, below 94% of compared French towns. Typically, 19% of adults out of school have no qualification in the typical compared French town.
Among 41 French towns of 3,518 to 3,550 people, the 12th 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.
Rubelles is the youngest (34.9); Deauville the oldest (63.3).
No nearby town is as old as Montmirail
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Montmirail | 51.3 | 32% | 3.4% | 5.2% |
| La Ferté-Gaucher 4,743 · 12.6 mi | 42.3 | 24% | 1.3% | 12% |
| Sézanne 4,576 · 13.3 mi | 50.7 | 30% | 3% | 8.3% |
| Essômes-sur-Marne 2,691 · 13.7 mi | 44.5 | 21% | 2.3% | 9.6% |
| Charly-sur-Marne 2,594 · 13.8 mi | 42.1 | 22% | 3.3% | 10% |
| Château-Thierry 15,097 · 14 mi | 41.3 | 22% | 2.4% | 16% |
| Dormans 2,890 · 14.6 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 Montmirail
What is the population of Montmirail?
3,535 at INSEE’s 2023 census, 6% fewer than in 2012 (3,742).
How old are Montmirail’s residents?
The median age is 51.3, older than 87% of compared French towns. 19% are under 18 and 32% 65 or older.
How many second homes are there in Montmirail?
68, with occasional dwellings: 3.4% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Montmirail?
INSEE counts 180 immigrants (born abroad, not French at birth), 5.2% of residents, and 150 foreign nationals (4.3%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Montmirail?
€23,210 a year per consumption unit in 2023 (median of compared French towns €25,970); 19.0% 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.