A smaller share of households in social housing than 99% of compared French towns: 0.5%
Households without a car make up 6%, against 11% in the typical compared French town. La Roche-Guyon counted 399 residents and 180 households at the 2023 Census. Here, 14% of residents are 15 to 24. Few places have so few couples with children: 19% here, fewer than in 78% 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 La Roche-Guyon
One home in five is a second home
The census counted 51 second homes and occasional dwellings in La Roche-Guyon, 21% of its 250 homes: higher than in 93% of compared French towns. 88% 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
La Roche-Guyon had 461 residents at the 2012 census and 399 in 2023, down 13%: slower growth than in 99% of compared French towns. Population ↓
Many people living alone
51% of La Roche-Guyon’s households are one person: higher than in 95% of compared French towns; 44% of residents 65 and over live alone. Households ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
21% of homes are second homes, a share 93% of compared French towns don’t reach
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
Flats: 24% here and 30% in the typical compared French town. The usual figure: 2.1% of homes are second homes in the typical compared French town. The share of empty homes stands at 4.9%.
La Roche-Guyon’s population moved −13% on 2012, less than in 99% 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
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 +4%; from 2017 to 2023, −17%.
Residents aged 65 and over: 20%, a lower share than 67% 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
■ La Roche-Guyon 42.9. The median compared French town: 44.
Half of La Roche-Guyon’s residents are under 42.9, younger than in 59% of compared French towns. Against that, 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
49% women, 51% men
About an even split. Median share of women: Val-d'Oise 51.5%, France 51.8%.
A higher share of one-person households than 95% of compared French towns, at 51%
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
The typical household size is 1.8 people. Census figures put single-parent households at 8.1% in La Roche-Guyon. By way of comparison, 35% of households are one person living alone in the typical compared French town.
At the median, €29,200 a year to live on
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 €29,200 a year per consumption unit, higher than in 80% of compared French towns.
A higher share of households headed by a manager or professional than 71% of compared French towns, at 14%
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, the share of households headed by a retired person is 32%; La Roche-Guyon has 30%. Households headed by a manager or professional: 9.4% in the typical compared French town, for comparison. Lower than in 53% of compared French towns: 14% of households are headed by a manual worker.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
In La Roche-Guyon, 8.3% of residents are immigrants, more than in 62% 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.
4.5% of residents are foreign nationals, more than in 52% of compared French towns. The wider picture: 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.
Married residents: 34%, a lower share than 93% 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
In the typical compared French town, the share of single residents is 25%; La Roche-Guyon has 34%. Against that, 43% of residents 15 and over are married in the typical compared French town.
La Roche-Guyon sits above 76% of compared French towns for graduates of higher education (39%)
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
Across La Roche-Guyon, 20% of adults out of school have no qualification. In the typical compared French town, 30% of adults out of school hold a higher-education qualification.
Of 41 French towns its size (399 to 2,582 people), the 11th 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.
At the ends of the range sit Villejust (37.2), the youngest, and Prayssac (62.3), the oldest.
Around La Roche-Guyon, 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 |
|---|---|---|---|---|
| La Roche-Guyon | 42.9 | 20% | 21% | 8.3% |
| Gasny 3,062 · 1.5 mi | 44.3 | 23% | 2% | 4.8% |
| Freneuse 4,505 · 3.1 mi | 38.9 | 18% | 4.6% | 15% |
| Bonnières-sur-Seine 5,064 · 4 mi | 38.5 | 17% | 1.1% | 14% |
| Rosny-sur-Seine 7,328 · 5.7 mi | 37 | 14% | 1.1% | 20% |
| Mantes-la-Jolie 43,526 · 6.6 mi | 35.1 | 15% | 0.5% | 30% |
| Vernon 25,290 · 6.7 mi | 40.4 | 20% | 1.4% | 18% |
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 La Roche-Guyon
What is the population of La Roche-Guyon?
399 at INSEE’s 2023 census, 13% fewer than in 2012 (461).
How old are La Roche-Guyon’s residents?
The median age is 42.9, younger than 59% of compared French towns. 24% are under 18 and 20% 65 or older.
How many second homes are there in La Roche-Guyon?
51, with occasional dwellings: 21% of all homes, against 2.1% for the median compared French town.
How many immigrants live in La Roche-Guyon?
INSEE counts 33 immigrants (born abroad, not French at birth), 8.3% of residents, and 18 foreign nationals (4.5%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in La Roche-Guyon?
€29,200 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 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.