A larger share of couples with children than 96% of compared French towns: 37%
In the typical compared French town, the share of households without a car is 11%; Saint-Théoffrey has 0.8%. Here, 15% of residents are 65 or over. This Isère town has fewer empty homes than 89% of compared French towns, at 3.8%. Census day 2023: 612 residents and 240 households 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-Théoffrey
One home in four is a second home
The census counted 86 second homes and occasional dwellings in Saint-Théoffrey, 25% of its 340 homes: higher than in 94% of compared French towns. 99% of them are houses. Their owners live elsewhere, so they aren’t in the population figures on this page. Homes & cars ↓
A town of families
37% of households are couples with children and 6.3% single parents with children; 25% of residents are under 15. Households ↓
Growing fast
Saint-Théoffrey had 450 residents at the 2012 census and 612 in 2023, up 36%: faster growth than in 98% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Above 94% of compared French towns: 25% of homes are second homes
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 make up 5.9%, against 30% in the typical compared French town. Across the comparison, 2.1% of homes are second homes in the typical compared French town. Census figures put households in social housing at 10% in Saint-Théoffrey.
A +36% change since 2012: faster than 98% 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, +16% to 2017 and +17% after, the town’s change compares with +5% for the median compared French town and +7% in Isère.
Residents aged 15 to 24 make up 6.4% in Saint-Théoffrey, less than in 98% 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-Théoffrey 40.1. The median compared French town: 44.
Half of Saint-Théoffrey’s residents are under 40.1, younger than in 78% of compared French towns. The wider picture: 11% of residents are 15 to 24 in the typical compared French town.
Women and men · all residents
47% women, 53% men
About 114 men for every 100 women. Median share of women: Isère 51.3%, France 51.8%.
A lower share of one-person households than 99% of compared French towns, at 21%
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
The typical household size is 2.5 people. 6.3% of households are single parents, or about one in 16. The benchmark for one-person households in the typical compared French town: 35%.
At the median, €28,310 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 median standard of living in Saint-Théoffrey is €28,310 a year per consumption unit: higher than in 73% of compared French towns.
In Saint-Théoffrey, 25% of households are headed by a retired person, fewer than in 83% 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
In the typical compared French town, the share of households headed by a manual worker is 14%; Saint-Théoffrey has 12%. The comparison figure for households headed by a retired person is 32% in the typical compared French town. Households headed by a manager or professional are more common here than in 75% of compared French towns.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
1.6% of residents are foreign nationals, below 84% 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.
Immigrants make up a share lower than in 75% of compared French towns; the median compared commune in Isère has 8%. Put another way, about one in 26: 3.8% of residents are immigrants. In the typical compared French town, 4.3% 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.
18% of residents 15 and over are single, fewer than in 98% 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 median compared French town 43% are married and 6.1% in a PACS; here it is 45% and 14%, and 4% are widowed. Across the comparison, 25% of residents 15 and over are single in the typical compared French town.
Below 99% of compared French towns: 8.1% of adults out of school have no 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
Graduates of higher education: 43% here and 30% in the typical compared French town. To put it in context, nearly a fifth of adults out of school have no qualification in the typical compared French town.
Among 41 French towns of 612 to 2,582 people, the 3rd 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.
Every neighbor is older than Saint-Théoffrey
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Saint-Théoffrey | 40.1 | 15% | 25% | 3.8% |
| Saint-Georges-de-Commiers 2,699 · 4.7 mi | 43 | 21% | 1.5% | 4% |
| La Mure 4,963 · 5.9 mi | 49.5 | 30% | 5.1% | 8.2% |
| Vizille 7,292 · 6 mi | 44 | 23% | 2.4% | 8% |
| Champ-sur-Drac 3,335 · 6.5 mi | 44.9 | 23% | 1.2% | 6.1% |
| Vif 8,530 · 6.5 mi | 44.2 | 20% | 1.5% | 5.1% |
| Jarrie 3,952 · 8.1 mi | 45.7 | 23% | 1.3% | 4% |
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-Théoffrey
What is the population of Saint-Théoffrey?
612 at INSEE’s 2023 census, 36% more than in 2012 (450).
How old are Saint-Théoffrey’s residents?
The median age is 40.1, younger than 78% of compared French towns. 27% are under 18 and 15% 65 or older.
How many second homes are there in Saint-Théoffrey?
86, with occasional dwellings: 25% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Saint-Théoffrey?
INSEE counts 23 immigrants (born abroad, not French at birth), 3.8% of residents, and 10 foreign nationals (1.6%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Saint-Théoffrey?
€28,310 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.