Les Iffs ranks above 97% of compared French towns on couples with children: 38%
The share of households headed by a manual worker is 4.8%, against 14% in the typical compared French town. 0.8% of homes are flats, fewer than in 99% of compared French towns. Les Iffs is home to 274 residents in 110 households, by the 2023 Census. Here, 17% of residents are 65 or over.
Throughout this page, the Ille-et-Vilaine 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 Les Iffs
A town of families
38% of households are couples with children and 9.3% single parents with children; 23% of residents are under 15. Households ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Les Iffs changed by +2% from 2012 to 2023, behind 62% 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
The years 2012 to 2017 brought +1%; 2017 to 2023, +1%. Over the whole period the median compared French town changed +5%, and the median Ille-et-Vilaine town +15%.
Les Iffs is younger than 67% of compared French towns: a median age of 41.8
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Les Iffs 41.8. The median compared French town: 44.
On the census count, just over one in ten residents are 15 to 24.
Women and men · all residents
52% women, 48% men
About 94 men for every 100 women. Median share of women: Ille-et-Vilaine 51.2%, France 51.8%.
One-person households make up 31% in Les Iffs, less than in 74% 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 Ille-et-Vilaine median and the France median
Living alone · share
Les Iffs sits close to the norm on single-parent households: 9.3%, about the same as in the typical compared French town. In the typical compared French town, one-person households come to 35%. A household here holds 2.5 people on average.
In Les Iffs, 3.6% of homes stand empty, fewer than in 91% of compared French towns
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 Les Iffs, 7.3% of homes are second homes, beside 2.1% in the typical compared French town. As a yardstick, 6.7% of homes stand empty in the typical compared French town. For Les Iffs, the census puts households without a car at 5.1%. Households in social housing are rarer here than in 99% of compared French towns.
A typical living standard of €29,290 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.
The midpoint of living standards here is €29,290 a year per consumption unit, higher than in 80% of compared French towns.
Above 98% of compared French towns: 32% of households are headed by a manager or professional
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
About one in three: that is how common households headed by a retired person are in Les Iffs (31%). The usual figure: 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).
Les Iffs ranks below 89% of compared French towns on immigrants: 2.3%
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.
1.5% of residents are foreign nationals (typical compared French town: 4.3%). Across the comparison, 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.
A smaller share of single residents than 88% of compared French towns: 21%
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
43% of residents 15 and over are married in the typical compared French town, against 46% in Les Iffs. The comparison figure for single residents is 25% in the typical compared French town.
Les Iffs sits above 88% of compared French towns for graduates of higher education (45%)
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
Where 19% of adults out of school have no qualification in the typical compared French town, Les Iffs has 14%. The benchmark for graduates of higher education in the typical compared French town: 30%.
Among 41 French towns of 274 to 2,582 people, the 8th 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 37.2 in Villejust to 62.3 in Prayssac.
1 in 6 nearby towns have a higher median age than Les Iffs
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Les Iffs | 41.8 | 17% | 7.3% | 2.3% |
| Tinténiac 3,939 · 2.7 mi | 42 | 20% | 2.1% | 2.3% |
| Romillé 4,189 · 5.2 mi | 39.2 | 16% | 1.4% | 2.6% |
| Saint-Domineuc 2,619 · 5.4 mi | 41.5 | 18% | 3.5% | 1.7% |
| Gévezé 6,061 · 6 mi | 38.3 | 14% | 0.9% | 4.4% |
| La Mézière 5,033 · 7.6 mi | 41.7 | 15% | 1.7% | 3% |
| Pleumeleuc 3,543 · 7.8 mi | 38.5 | 13% | 1.4% | 1.8% |
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 Les Iffs
What is the population of Les Iffs?
274 at INSEE’s 2023 census, 2% more than in 2012 (269).
How old are Les Iffs’ residents?
The median age is 41.8, younger than 67% of compared French towns. 30% are under 18 and 17% 65 or older.
How many second homes are there in Les Iffs?
9, with occasional dwellings: 7.3% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Les Iffs?
INSEE counts 6 immigrants (born abroad, not French at birth), 2.3% of residents, and 4 foreign nationals (1.5%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Les Iffs?
€29,290 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.