Trappes is younger than 99% of compared French towns: a median age of 32.7
With households without a car at 27%, Trappes is ahead of 93% of compared French towns on that count. The town’s 12,820 households held 34,689 residents at the 2023 Census. Here, 22% of households are headed by a manual worker. Compared with other places, flats are common here: 82%, more than in 96% of compared French towns.
Throughout this page, the Yvelines 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 Trappes
Immigrants
INSEE counts 10,600 immigrants in Trappes (people born abroad who weren’t French at birth, whatever their nationality now): 31% of residents, against 15% for the median compared commune in Yvelines. 24% are foreign nationals. Immigrants and foreign nationals ↓
A young town
Half of Trappes’ residents are under 32.7 and half over; the median of compared French towns is 44. 25% are under 15 and 11% are 65 or older. Ages ↓
A town of families
36% of households are couples with children and 15% single parents with children; 25% of residents are under 15. Households ↓
Social housing
47% of households rent from a social landlord (HLM), 17% rent privately and 34% own their home. Homes & cars ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
+17% since 2012, a pace 85% of compared French towns didn’t match
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 compared French town changed +5% over the same years, the median Yvelines town +7%. The change was +9% from 2012 to 2017 and +6% from 2017 to 2023.
Residents aged 65 and over: 11%, a lower share than 99% 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
■ Trappes 32.7. The median compared French town: 44.
Residents aged 15 to 24: 15%, above 95% of compared French towns. In the typical compared French town, 22% of residents are 65 or over.
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Yvelines 51.6%, France 51.8%.
Above 94% of compared French towns: 36% 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 Yvelines median and the France median
Living alone · share
On average, 2.7 people share a household. 15% of households are single parents, more than in 96% of compared French towns. In the typical compared French town, the share of couples with children is 25%. By its share of one-person households (33%), Trappes is below 64% of compared French towns.
Above 99% of compared French towns: 47% of households rent social housing (HLM)
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 9.9% of households, residents of 30 years or more for 10%. Typically, 12% of households rent social housing (HLM) in the typical compared French town. On empty homes, Trappes sits lower than nearly four fifths of compared French towns: 4.7%. Where 2.1% of homes are second homes in the typical compared French town, Trappes has 1.1%.
A median of €20,060 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.
Half of residents live in households above €20,060 a year per consumption unit and half below; the level is lower than in 96% of compared French towns. The share living below the poverty line is 29.5%.
Trappes ranks below 97% of compared French towns on households headed by a retired person: 18%
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
In the typical compared French town, nearly one in ten households are headed by a manager or professional; in Trappes, 13%. To put it in context, nearly a third 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).
Trappes ranks above 99% of compared French towns on immigrants: 31%
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 Yvelines has 15%; immigrants here make up a share higher than in 99% of compared French towns. Against that, 6.5% of residents are immigrants in the typical compared French town. Locally, nearly a quarter of residents are foreign nationals.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Above 94% of compared French towns: 37% of residents 15 and over are single
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
Compared with other places, married residents are scarce here: 43%, fewer than in 53% of compared French towns. The benchmark for single residents in the typical compared French town: 25%.
A higher share of adults with no qualification than 95% of compared French towns, at 32%
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, the share of graduates of higher education is 30%; Trappes has 25%. The usual figure: 19% of adults out of school have no qualification in the typical compared French town.
41 French towns of 32,455 to 37,113 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.
Creil is the youngest (31.8); Saint-Raphaël the oldest (58.9).
Trappes is younger 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 |
|---|---|---|---|---|
| Trappes | 32.7 | 11% | 1.1% | 31% |
| Élancourt 26,365 · 1.5 mi | 37.7 | 14% | 1.2% | 17% |
| Montigny-le-Bretonneux 32,465 · 2 mi | 39.7 | 15% | 2.4% | 16% |
| La Verrière 5,994 · 2.1 mi | 35.4 | 15% | 0.8% | 26% |
| Bois-d'Arcy 16,586 · 2.3 mi | 35.9 | 13% | 2.7% | 16% |
| Maurepas 20,629 · 2.7 mi | 38.8 | 18% | 1.6% | 17% |
| Le Mesnil-Saint-Denis 7,276 · 2.8 mi | 43.2 | 20% | 1.9% | 8.9% |
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 Trappes
What is the population of Trappes?
34,689 at INSEE’s 2023 census, 17% more than in 2012 (29,774).
How old are Trappes’ residents?
The median age is 32.7, younger than 99% of compared French towns. 30% are under 18 and 11% 65 or older.
How many second homes are there in Trappes?
150, with occasional dwellings: 1.1% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Trappes?
INSEE counts 10,640 immigrants (born abroad, not French at birth), 31% of residents, and 8,280 foreign nationals (24%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Trappes?
€20,060 a year per consumption unit in 2023 (median of compared French towns €25,970); 29.5% 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 4, 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.