Above 94% of compared French towns: 22% of homes are second homes
Compared with 11% in the typical compared French town, 8% of residents are 15 to 24 here. By contrast, on households headed by a retired person, Saint-Guillaume sits higher than 91% of compared French towns: 44%. At the 2023 Census, 238 people lived locally, in 110 households. The census found that nearly a third of households are couples with children in the town.
Throughout this page, the Isère 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 Saint-Guillaume
One home in four is a second home
The census counted 36 second homes and occasional dwellings in Saint-Guillaume, 22% of its 160 homes: higher than in 94% of compared French towns. 83% 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
Saint-Guillaume had 283 residents at the 2012 census and 238 in 2023, down 16%: slower growth than in 99% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A smaller share of flats than 87% of compared French towns: 10%
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
Just over one in ten homes stand empty; in the typical compared French town the figure is 6.7%. In the typical compared French town, the share of flats is 30%. For Saint-Guillaume, the census puts households in social housing at 7.6%. Fewer households without a car than in 83% of compared French towns: 5.6%.
Saint-Guillaume’s population moved −16% 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
Against +5% for the median compared French town and +7% for the median Isère town, the change came in two steps: −9% from 2012 to 2017, then −8% to 2023.
A median age of 49.8: Saint-Guillaume is older than 82% 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
■ Saint-Guillaume 49.8. The median compared French town: 44.
By its share of residents aged 65 and over (27%), Saint-Guillaume is above three quarters of compared French towns.
Women and men · all residents
49% women, 51% men
About an even split. Median share of women: Isère 51.3%, France 51.8%.
A lower share of one-person households than 77% of compared French towns, at 30%
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 Isère median and the France median
Living alone · share
Each household has 2.2 people on average. Single-parent households are rarer here than in 99% of compared French towns. In the typical compared French town, the share of one-person households is 35%.
A typical living standard of €25,510 a year
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.
At €25,510 a year per consumption unit, the median standard of living here is lower than in 54% of compared French towns.
A smaller share of households headed by a manual worker than 81% of compared French towns: 9.3%
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 manager or professional make up about one in 11 here (9.1%). As a yardstick, 14% of households are headed by a manual worker in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Fewer immigrants than 72% of compared French towns: 4.2%
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 Isère has 8%; immigrants here make up a share lower than in 72% of compared French towns. For comparison, 6.5% of residents are immigrants in the typical compared French town. About one in 27: that is how common foreign nationals are in Saint-Guillaume (3.7%).
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
A higher share of married residents than 91% of compared French towns, at 50%
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 Saint-Guillaume, a fifth of residents 15 and over are single, beside 25% in the typical compared French town. The share of married residents in the typical compared French town is 43%.
A larger share of adults with no qualification than 65% of compared French towns: 22%
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 32% of adults out of school hold a higher-education qualification, where the figure in the typical compared French town is 30%. Set beside that, 19% of adults out of school have no qualification in the typical compared French town.
14th highest median age among 41 French towns of 238 to 2,582
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.
Saint-Guillaume and its 6 nearest towns: 1 of them are older
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Saint-Guillaume | 49.8 | 27% | 22% | 4.2% |
| Vif 8,530 · 7.9 mi | 44.2 | 20% | 1.5% | 5.1% |
| Saint-Georges-de-Commiers 2,699 · 8.1 mi | 43 | 21% | 1.5% | 4% |
| Villard-de-Lans 4,328 · 8.6 mi | 51 | 28% | 64% | 3.7% |
| La Mure 4,963 · 9.9 mi | 49.5 | 30% | 5.1% | 8.2% |
| Varces-Allières-et-Risset 8,542 · 10.8 mi | 35.8 | 15% | 1.4% | 5.5% |
| Champ-sur-Drac 3,335 · 11 mi | 44.9 | 23% | 1.2% | 6.1% |
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 Saint-Guillaume
What is the population of Saint-Guillaume?
238 at INSEE’s 2023 census, 16% fewer than in 2012 (283).
How old are Saint-Guillaume’s residents?
The median age is 49.8, older than 82% of compared French towns. 21% are under 18 and 27% 65 or older.
How many second homes are there in Saint-Guillaume?
36, with occasional dwellings: 22% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Saint-Guillaume?
INSEE counts 10 immigrants (born abroad, not French at birth), 4.2% of residents, and 9 foreign nationals (3.7%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Saint-Guillaume?
€25,510 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.