10% of residents are 65 or over, below 99% of compared French towns
Here 0.4% of households rent social housing (HLM), where the figure in the typical compared French town is 12%. The share of single-parent households stands at 5.7%. Nearly one in ten households are headed by a manual worker, a lower share than in 80% of compared French towns. There were 270 households in Mondorff at the 2023 Census, home to 609 residents.
Throughout this page, the Moselle 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 Mondorff
One home in nine is a second home
The census counted 33 second homes and occasional dwellings in Mondorff, 11% of its 310 homes: higher than in 88% of compared French towns. 70% of them are houses. Their owners live elsewhere, so they aren’t in the population figures on this page. Homes & cars ↓
Immigrants
INSEE counts 200 immigrants in Mondorff (people born abroad who weren’t French at birth, whatever their nationality now): 27% of residents, against 12% for the median compared commune in Moselle. 21% are foreign nationals. Immigrants and foreign nationals ↓
Many graduates
49% of residents 15 and over who have left education hold a diploma above the bac, 23% a master’s or more (bac+5). Qualifications ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Mondorff ranks above 88% of compared French towns on second homes: 11%
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
Newcomers of less than two years account for 16% of households, residents of 30 years or more for 12%. Elsewhere, 2.1% of homes are second homes in the typical compared French town. Lower than in 67% of compared French towns: 7.9% of households have no car. 4.8% of homes stand empty (typical compared French town: 6.7%).
Growth of +6% since 2012 puts Mondorff ahead of 56% 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
The median Moselle town changed −1% and the median compared French town +5%; here the first five years brought −10% and the next six +18%.
Mondorff is younger than 82% of compared French towns: a median age of 39.4
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Mondorff 39.4. The median compared French town: 44.
In the typical compared French town, just over one in ten residents are 15 to 24; in Mondorff, 9.4%.
Women and men · all residents
51% women, 49% men
About an even split. Median share of women: Moselle 51.8%, France 51.8%.
In Mondorff, 30% of households are couples with children, more than in 76% of compared French towns
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 Moselle median and the France median
Living alone · share
Households average 2.3 people. In the typical compared French town, a quarter of households are couples with children. Mondorff has fewer one-person households than 66% of compared French towns, at 32%.
Half of residents have a standard of living above €42,510 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.
The midpoint of living standards here is €42,510 a year per consumption unit, higher than in 99% of compared French towns.
Households headed by a retired person: 23%, a lower share than 90% 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
9.4% of households are headed by a manager or professional in the typical compared French town, against 19% in Mondorff. As a reference point, 32% of households are headed by a retired person in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Above 97% of compared French towns: 27% of residents are immigrants
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 Mondorff, just over a fifth of residents are foreign nationals, beside 4.3% in the typical compared French town. The wider picture: 6.5% of residents are immigrants in the typical compared French town. The median compared commune in Moselle has 12%; immigrants here make up a share higher than in 97% 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.
Mondorff ranks above 83% of compared French towns on married residents: 48%
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
Nearly a quarter of residents 15 and over are single (typical compared French town: 25%). The share of married residents in the typical compared French town is 43%.
Mondorff: 49% of adults out of school hold a higher-education qualification, above 92% 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
By its share of adults with no qualification (13%), Mondorff is below 83% of compared French towns. Set beside that, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
41 French towns of 609 to 2,582 people: this is the 2nd youngest
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 Mondorff
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Mondorff | 39.4 | 10% | 11% | 27% |
| Cattenom 2,580 · 6.8 mi | 41.8 | 18% | 1.7% | 6.4% |
| Hettange-Grande 7,772 · 8.5 mi | 40.7 | 17% | 2% | 10% |
| Manom 3,137 · 9.9 mi | 44.4 | 22% | 2% | 6.8% |
| Yutz 17,391 · 10.8 mi | 41 | 19% | 1.3% | 13% |
| Thionville 42,658 · 11.1 mi | 41.4 | 20% | 2.1% | 14% |
| Ottange 2,960 · 12.3 mi | 43.8 | 22% | 2.9% | 30% |
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 Mondorff
What is the population of Mondorff?
609 at INSEE’s 2023 census, 6% more than in 2012 (573).
How old are Mondorff’s residents?
The median age is 39.4, younger than 82% of compared French towns. 23% are under 18 and 10% 65 or older.
How many second homes are there in Mondorff?
33, with occasional dwellings: 11% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Mondorff?
INSEE counts 160 immigrants (born abroad, not French at birth), 27% of residents, and 130 foreign nationals (21%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Mondorff?
€42,510 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 8, 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.