In Mortefontaine, 5.9% of residents are 15 to 24, fewer than in 99% of compared French towns
A fifth of households are single parents; in the typical compared French town the figure is 10%. Locally, just over a third of households are headed by a retired person. The 2023 Census counted 208 residents in 100 households.
Throughout this page, the Aisne 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 Mortefontaine
One home in seven is a second home
The census counted 20 second homes and occasional dwellings in Mortefontaine, 15% of its 130 homes: higher than in 91% of compared French towns. 100% of them are houses. Their owners live elsewhere, so they aren’t in the population figures on this page. Homes & cars ↓
Fewer residents than in 2012
Mortefontaine had 244 residents at the 2012 census and 208 in 2023, down 15%: slower growth than in 99% of compared French towns. Population ↓
An older town
Half of Mortefontaine’s residents are under 51 and half over; the median of compared French towns is 44. 24% are 65 or older (France median 22%), 3.5% 80 or older. Ages ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A higher share of second homes than 91% of compared French towns, at 15%
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
Nothing unusual on empty homes: 7.6%, close to the figure in the typical compared French town. Households in social housing are rarer here than in 99% of compared French towns. For comparison, 2.1% of homes are second homes in the typical compared French town. 7.2% of households moved in less than two years ago; 26% have been in their home 30 years or more.
From 2012 to 2023, 99% of compared French towns grew faster than Mortefontaine: −15%
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 change was −5%; from 2017 to 2023, −11%.
Older than 86% of compared French towns: half of Mortefontaine is over 51
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Mortefontaine 51. The median compared French town: 44.
The share of residents aged 65 and over is 24%, against 22% in the typical compared French town.
Women and men · all residents
48% women, 52% men
About 108 men for every 100 women. Median share of women: Aisne 52.5%, France 51.8%.
Below 74% of compared French towns: 20% of households are couples with children
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 Aisne median and the France median
Living alone · share
Households average 2.1 people. The wider picture: 25% of households are couples with children in the typical compared French town. One-person households are about as common here as in the typical compared French town, at 35%.
€25,330 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.
Half of Mortefontaine’s residents live in households with a standard of living below €25,330 a year per consumption unit, and half above: lower than in 56% of compared French towns.
Households headed by a manual worker: 20%, a higher 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
Households headed by a manager or professional are rarer here than in 99% of compared French towns. The benchmark for households headed by a manual worker in the typical compared French town: 14%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
In Mortefontaine, 4% of residents are immigrants, fewer than in 74% 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.
The median compared commune in Aisne has 5.7%; immigrants here make up a share lower than in 74% of compared French towns. For Mortefontaine, the census puts foreign nationals at 3.5%. By way of comparison, 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.
A larger share of married residents than 72% of compared French towns: 46%
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
Set against 25% in the typical compared French town, 23% of residents 15 and over are single in Mortefontaine. For married residents, the comparison in the typical compared French town is 43%.
More adults with no qualification than 77% of compared French towns: 25%
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
In the typical compared French town, 30% of adults out of school hold a higher-education qualification; in Mortefontaine, 25%. The usual figure: 19% of adults out of school have no qualification in the typical compared French town.
11th highest median age among 41 French towns of 208 to 2,582
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 Prayssac (62.3), the oldest.
Around Mortefontaine, 1 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 |
|---|---|---|---|---|
| Mortefontaine | 51 | 24% | 15% | 4% |
| Villers-Cotterêts 10,489 · 5.7 mi | 41.5 | 19% | 1.3% | 12% |
| Crépy-en-Valois 14,351 · 11.2 mi | 44.8 | 22% | 1.4% | 11% |
| Soissons 28,046 · 11.5 mi | 42.5 | 23% | 1.2% | 15% |
| Choisy-au-Bac 3,449 · 11.5 mi | 44.9 | 25% | 2.3% | 6.6% |
| Belleu 3,659 · 11.8 mi | 51.5 | 31% | 1.4% | 11% |
| Béthisy-Saint-Pierre 3,111 · 12.6 mi | 41 | 19% | 1.1% | 3.5% |
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 Mortefontaine
What is the population of Mortefontaine?
208 at INSEE’s 2023 census, 15% fewer than in 2012 (244).
How old are Mortefontaine’s residents?
The median age is 51, older than 86% of compared French towns. 17% are under 18 and 24% 65 or older.
How many second homes are there in Mortefontaine?
20, with occasional dwellings: 15% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Mortefontaine?
INSEE counts 8 immigrants (born abroad, not French at birth), 4% of residents, and 7 foreign nationals (3.5%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Mortefontaine?
€25,330 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 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.