2.6% of households have no car, fewer than in 99% of compared French towns
One-person households make up 22%, against 35% in the typical compared French town. At the 2023 Census Diémoz was home to 2,947 people in 1,150 households. 12% of homes are flats, or about one in eight. Lower than in 95% of compared French towns: 2.7% of households rent social housing (HLM).
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 Diémoz
A town of families
35% of households are couples with children and 6.2% single parents with children; 18% of residents are under 15. Households ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A +11% change since 2012: faster than 72% 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 Isère.
Diémoz is younger than 61% of compared French towns: a median age of 42.6
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Diémoz 42.6. The median compared French town: 44.
21% of residents are 65 or over (typical compared French town: 22%). Residents aged 15 to 24 come to 11% in Diémoz, about one in ten.
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Isère 51.3%, France 51.8%.
Couples with children: 35%, a higher share than 92% of compared French towns
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
Average household size: 2.5 people. The comparison figure for couples with children is 25% in the typical compared French town. On single-parent households, Diémoz sits lower than 95% of compared French towns: 6.2%.
Diémoz ranks below 81% of compared French towns on second homes: 1%
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
In Diémoz, 5.5% of homes stand empty, beside 6.7% in the typical compared French town. Set beside that, 2.1% of homes are second homes in the typical compared French town.
€29,510 a year is the median standard of living here
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.
Per consumption unit, half of residents live on more than €29,510 a year: higher than in 82% of compared French towns. 5.0% of residents live below the poverty line INSEE uses.
Diémoz sits below 67% of compared French towns for households headed by a retired person (29%)
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
By its share of households headed by a manual worker (12%), Diémoz is below two thirds of compared French towns. The benchmark for households headed by a retired person in the typical compared French town: 32%. Households headed by a manager or professional come to 10% in the town, about one in ten.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
In Diémoz, 1.6% of residents are foreign nationals, fewer than in 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.
4% of residents are immigrants; in the typical compared French town the figure is 6.5%. That is lower than in 73% of compared French towns; the median compared commune in Isère has 8%. Foreign nationals: 4.3% in the typical compared French town, for comparison.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Diémoz sits below 92% of compared French towns for single residents (20%)
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 43% in the typical compared French town, 49% of residents 15 and over are married here. The comparison figure for single residents is 25% in the typical compared French town.
In Diémoz, 15% of adults out of school have no qualification, fewer than in 73% 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
Put another way, about one in three: 30% of adults out of school hold a higher-education qualification. Set beside that, 19% of adults out of school have no qualification in the typical compared French town.
41 French towns of 2,916 to 2,978 people: this is the 6th 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.
Ages run from 37.1 in Péron to 60.1 in Vimoutiers.
2 in 6 nearby towns have a higher median age than Diémoz
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Diémoz | 42.6 | 21% | 1% | 4% |
| Saint-Georges-d'Espéranche 3,545 · 2.1 mi | 42.8 | 20% | 1.7% | 3.2% |
| Saint-Quentin-Fallavier 6,189 · 3.1 mi | 38.4 | 17% | 1.1% | 11% |
| Heyrieux 4,956 · 3.2 mi | 44.6 | 22% | 1.4% | 5% |
| Villefontaine 19,445 · 3.5 mi | 34.5 | 12% | 1% | 17% |
| Valencin 2,878 · 3.7 mi | 40.1 | 14% | 0.9% | 2.8% |
| La Verpillière 7,786 · 4 mi | 37.7 | 17% | 1.2% | 15% |
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 Diémoz
What is the population of Diémoz?
2,947 at INSEE’s 2023 census, 11% more than in 2012 (2,664).
How old are Diémoz’s residents?
The median age is 42.6, younger than 61% of compared French towns. 22% are under 18 and 21% 65 or older.
How many second homes are there in Diémoz?
12, with occasional dwellings: 1% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Diémoz?
INSEE counts 120 immigrants (born abroad, not French at birth), 4% of residents, and 49 foreign nationals (1.6%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Diémoz?
€29,510 a year per consumption unit in 2023 (median of compared French towns €25,970); 5.0% 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 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.