Photo: elisabeth · CC BY-SA 4.0Montmorency: 25% of households are headed by a manager or professional, above 94% of compared French towns
Compared with 30% in the typical compared French town, 65% of homes are flats here. Montmorency had 21,763 residents in 9,110 households at the 2023 census. Households without a car make up about one in six here (18%). Few places have as many couples with children: 29% here, more than in 71% of compared French towns.
Throughout this page, the Val-d'Oise 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 Montmorency
Immigrants
INSEE counts 3,600 immigrants in Montmorency (people born abroad who weren’t French at birth, whatever their nationality now): 17% of residents, against 16% for the median compared commune in Val-d'Oise. 11% are foreign nationals. Immigrants and foreign nationals ↓
Many graduates
51% of residents 15 and over who have left education hold a diploma above the bac, 24% a master’s or more (bac+5). Qualifications ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
From 2012 to 2023, 52% of compared French towns grew faster than Montmorency: +4%
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
Over the same years the median compared French town changed +5%, the median Val-d'Oise town +8%. From 2012 to 2017 the change was +3%; from 2017 to 2023, +1%.
A median age of 41.4: Montmorency is younger than 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
■ Montmorency 41.4. The median compared French town: 44.
Nearly a fifth of residents are 65 or over, against 22% in the typical compared French town. For Montmorency, the census puts residents aged 15 to 24 at 12%.
Women and men · all residents
52% women, 48% men
About 91 men for every 100 women. Median share of women: Val-d'Oise 51.5%, France 51.8%.
Single-parent households make up 12% in Montmorency, more than in 81% 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 Val-d'Oise median and the France median
Living alone · share
There are 2.3 people in the average household. Single-parent households: 10% in the typical compared French town, for comparison. In Montmorency, 36% of households are one person living alone, beside 35% in the typical compared French town.
Montmorency: 15% of households rent social housing (HLM), above 60% 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
Empty homes make up 7.9%, against 6.7% in the typical compared French town. As a reference point, just over one in ten households rent social housing (HLM) in the typical compared French town. The share of second homes stands at 2.1%.
The median resident lives on €32,380 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 midpoint of living standards here is €32,380 a year per consumption unit, higher than in 92% of compared French towns. As for poverty, 11.9% of residents are below the line.
In Montmorency, 6.8% of households are headed by a manual worker, fewer than in 91% 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
25% of Montmorency’s households are headed by a manager or professional, against 9.4% in the median compared French town; 26% by a retired person (32%). The share of households headed by a manual worker in the typical compared French town is 14%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Montmorency ranks above 88% of compared French towns on immigrants: 17%
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 share of foreign nationals tops 85% of compared French towns: 11%. Immigrants make up 6.5% 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 single residents than 81% of compared French towns: 31%
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: 41% here and 43% in the typical compared French town. To put it in context, a quarter of residents 15 and over are single in the typical compared French town.
In Montmorency, 51% of adults out of school hold a higher-education qualification, more than in 94% 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
Here 13% of adults out of school have no qualification, where the figure in the typical compared French town is 19%. The usual figure: 30% of adults out of school hold a higher-education qualification in the typical compared French town.
Ranked by age, 21st oldest of 41 French towns this size
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 Saint-Cyr-l'École (34.5), the oldest Gujan-Mestras (52.5).
2 of 6 neighbors are older than Montmorency
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Montmorency | 41.4 | 19% | 2.1% | 17% |
| Soisy-sous-Montmorency 18,008 · 1 mi | 40.9 | 19% | 1.4% | 19% |
| Andilly 2,742 · 1.2 mi | 42.7 | 20% | 0.8% | 15% |
| Deuil-la-Barre 23,099 · 1.4 mi | 39.1 | 16% | 1% | 24% |
| Groslay 8,453 · 1.4 mi | 37.9 | 14% | 0.8% | 16% |
| Enghien-les-Bains 11,432 · 1.6 mi | 40.8 | 21% | 3.5% | 18% |
| Margency 3,012 · 1.6 mi | 42 | 19% | 1% | 13% |
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 Montmorency
What is the population of Montmorency?
21,763 at INSEE’s 2023 census, 4% more than in 2012 (20,842).
How old are Montmorency’s residents?
The median age is 41.4, younger than 70% of compared French towns. 23% are under 18 and 19% 65 or older.
How many second homes are there in Montmorency?
210, with occasional dwellings: 2.1% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Montmorency?
INSEE counts 3,600 immigrants (born abroad, not French at birth), 17% of residents, and 2,450 foreign nationals (11%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Montmorency?
€32,380 a year per consumption unit in 2023 (median of compared French towns €25,970); 11.9% 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 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.