L'Isle-Adam ranks below 88% of compared French towns on households headed by a manual worker: 7.8%
The figure for couples with children is 20% in L'Isle-Adam and 25% in the typical compared French town. This Val-d'Oise town has more flats than 79% of compared French towns, at 54%. The 2023 Census counted 12,493 residents in 6,090 households. The census found that 27% of residents are 65 or over here.
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.
+5% since 2012, a pace below 50% 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
Here the change came as +1% to 2017, then +4% to 2023.
Older than 70% of compared French towns: half of L'Isle-Adam is over 47.1
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ L'Isle-Adam 47.1. The median compared French town: 44.
Census figures put residents aged 15 to 24 at 10% in L'Isle-Adam.
Women and men · all residents
54% women, 46% men
About 84 men for every 100 women. Median share of women: Val-d'Oise 51.5%, France 51.8%. Women live longer than men, so towns with many older residents have more women.
One-person households make up 42% in L'Isle-Adam, more than in 77% 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 people in the average household. Typically, just over a third of households are one person living alone in the typical compared French town. Few places have as many single-parent households: 12% here, more than in 76% of compared French towns.
L'Isle-Adam ranks above 71% of compared French towns on households in social housing: 18%
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
Households that moved in under two years ago: 12%. Those in their home 30 years or more: 13%. Few places have as many second homes: 3.5% here, more than in two thirds of compared French towns. Where 11% of households have no car in the typical compared French town, L'Isle-Adam has 14%.
€32,270 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 L'Isle-Adam’s residents live in households with a standard of living below €32,270 a year per consumption unit, and half above: higher than in 92% of compared French towns. Under the poverty line sit 10.0% of residents.
In L'Isle-Adam, 16% of households are headed by a manager or professional, more than in 81% 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
37% of households are headed by a retired person (typical compared French town: 32%). Elsewhere, nearly one in ten households are headed by a manager or professional in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
10% of residents are immigrants, a share 72% of compared French towns don’t reach
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 figure for foreign nationals is 8.1% in L'Isle-Adam and 4.3% in the typical compared French town. The median compared commune in Val-d'Oise has 16%; immigrants here make up a share higher than in 72% of compared French towns. The usual figure: 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.
Single residents: 28%, a higher share than 66% 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
The share of married residents is 42%, against 43% in the typical compared French town. The wider picture: 25% of residents 15 and over are single in the typical compared French town.
Above 80% of compared French towns: 40% of adults out of school hold a higher-education qualification
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
With adults with no qualification at 16%, L'Isle-Adam is behind 67% of compared French towns on that count. Graduates of higher education make up 30% in the typical compared French town.
The 10th oldest of 41 French towns of 12,199 to 12,731 people
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
Ages run from 33.2 in Villetaneuse to 60 in Andernos-les-Bains.
L'Isle-Adam is older than every town around it
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| L'Isle-Adam | 47.1 | 27% | 3.5% | 10% |
| Parmain 5,655 · 0.8 mi | 42.6 | 18% | 2.2% | 8.4% |
| Champagne-sur-Oise 5,036 · 1.8 mi | 39.3 | 15% | 1% | 9.2% |
| Mériel 5,347 · 2.8 mi | 41.3 | 16% | 1.3% | 8.9% |
| Presles 4,017 · 3 mi | 44.3 | 19% | 1.1% | 8.2% |
| Persan 14,359 · 3.5 mi | 32.9 | 10% | 0.3% | 27% |
| Beaumont-sur-Oise 10,232 · 3.6 mi | 36.4 | 14% | 1.4% | 19% |
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 L'Isle-Adam
What is the population of L'Isle-Adam?
12,493 at INSEE’s 2023 census, 5% more than in 2012 (11,918).
How old are L'Isle-Adam’s residents?
The median age is 47.1, older than 70% of compared French towns. 19% are under 18 and 27% 65 or older.
How many second homes are there in L'Isle-Adam?
240, with occasional dwellings: 3.5% of all homes, against 2.1% for the median compared French town.
How many immigrants live in L'Isle-Adam?
INSEE counts 1,300 immigrants (born abroad, not French at birth), 10% of residents, and 1,010 foreign nationals (8.1%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in L'Isle-Adam?
€32,270 a year per consumption unit in 2023 (median of compared French towns €25,970); 10.0% 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.