Grandchamp sits below 99% of compared French towns for households without a car (2%)
7.4% of homes are second homes, against 2.1% in the typical compared French town. At the 2023 Census Grandchamp was home to 300 people in 130 households. Here, 1.5% of homes are flats. On residents aged 65 and over, Grandchamp sits lower than 88% of compared French towns: 16%.
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 Grandchamp
A town of families
35% of households are couples with children and 4.5% single parents with children; 18% of residents are under 15. Households ↓
Fewer residents than in 2012
Grandchamp had 319 residents at the 2012 census and 300 in 2023, down 6%: slower growth than in 91% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Grandchamp’s population moved −6% on 2012, less than in 91% 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
In two steps, +2% to 2017 and −8% after, the town’s change compares with +5% for the median compared French town and +7% in Yvelines.
A median age of 46: Grandchamp is older than 63% 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
■ Grandchamp 46. The median compared French town: 44.
Where 11% of residents are 15 to 24 in the typical compared French town, Grandchamp has 9.3%.
Women and men · all residents
52% women, 48% men
About 92 men for every 100 women. Median share of women: Yvelines 51.6%, France 51.8%.
A higher share of couples with children than 92% of compared French towns, at 35%
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
The figure for one-person households is 25% in Grandchamp and 35% in the typical compared French town. On the census count, 4.5% of households are single parents.
99% of homes are houses
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
Some 8.6% of households are newcomers of under two years, against 18% who have been there 30 years or more. The share of empty homes stands at 7.4%.
At the median, €33,120 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 €33,120 a year per consumption unit, higher than in 93% of compared French towns.
In Grandchamp, 16% of households are headed by a manager or professional, more than in 80% 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
Households headed by a manual worker are rarer here than in 99% of compared French towns. On the census count, a third of households are headed by a retired person. The wider picture: 9.4% of 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).
3.3% of residents are immigrants, fewer than in 79% 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.
By its share of foreign nationals (2.2%), Grandchamp is below 76% of compared French towns. As a reference point, 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.
19% of residents 15 and over are single, below 96% 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
Married residents: 46% here and 43% in the typical compared French town. For single residents, the comparison in the typical compared French town is 25%.
13% of adults out of school have no qualification, below 85% 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
The figure for graduates of higher education is 37% in Grandchamp and 30% in the typical compared French town. The wider picture: nearly a fifth of adults out of school have no qualification in the typical compared French town.
The 19th oldest of 41 French towns of 300 to 2,582 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 37.2 in Villejust to 62.3 in Prayssac.
A younger town than 2 of the 6 around it: Grandchamp
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
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 Grandchamp
What is the population of Grandchamp?
300 at INSEE’s 2023 census, 6% fewer than in 2012 (319).
How old are Grandchamp’s residents?
The median age is 46, older than 63% of compared French towns. 22% are under 18 and 16% 65 or older.
How many second homes are there in Grandchamp?
11, with occasional dwellings: 7.4% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Grandchamp?
INSEE counts 10 immigrants (born abroad, not French at birth), 3.3% of residents, and 7 foreign nationals (2.2%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Grandchamp?
€33,120 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 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.