Flats: 4.6%, a lower share than 96% of compared French towns
Households in social housing are rarer here than in 99% of compared French towns. Illy had 413 residents in 190 households at the 2023 census. Across Illy, nearly a third of households are couples with children. The share of households headed by a retired person trails 92% of compared French towns: 22%.
Throughout this page, the Ardennes 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.
Illy changed by +4% from 2012 to 2023, slower than 52% 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 −9% for the median Ardennes town, the change came in two steps: +4% from 2012 to 2017, then ±0% to 2023.
9.1% of residents are 15 to 24, fewer than in 80% 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
■ Illy 45.7. The median compared French town: 44.
With a median age of 45.7, Illy is older than just over three fifths of compared French towns. To put it in context, 11% of residents are 15 to 24 in the typical compared French town. Across Illy, 21% of residents are 65 or over.
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Ardennes 52.2%, France 51.8%.
27% of households are one person living alone, fewer than in 87% 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 Ardennes median and the France median
Living alone · share
With single-parent households at 8.1%, Illy is behind 78% of compared French towns on that count. By way of comparison, just over a third of households are one person living alone in the typical compared French town.
Below 65% of compared French towns: 8.2% of households have no car
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
Illy sits close to the norm on second homes: 1.5%, about the same as in the typical compared French town. Fewer empty homes than in 74% of compared French towns: 5%. For comparison, just over one in ten households have no car in the typical compared French town. Just over a third of households have been in place 30 years or more; 5.4% moved in within the last two years.
Half of residents have a standard of living above €24,780 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.
Living standards centre on €24,780 a year per consumption unit: lower than in 63% of compared French towns.
Illy ranks above 64% of compared French towns on households headed by a manual worker: 16%
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
The share of households headed by a manager or professional trails 59% of compared French towns: 8.1%. Against that, 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).
3.4% of residents are immigrants, below 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.
Against a figure of 4.3% in the typical compared French town, the share of foreign nationals in Illy comes in at 1.9%. Elsewhere, 6.5% of residents are immigrants in the typical compared French town. The median compared commune in Ardennes has 6.7%; immigrants here make up a share lower than in 79% of compared French towns.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
A lower share of single residents than 90% of compared French towns, at 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
On the census count, 44% of residents 15 and over are married. For single residents, the comparison in the typical compared French town is 25%.
Fewer graduates of higher education than 89% of compared French towns: 19%
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
Roughly two in ten: a fifth of adults out of school have no qualification. To put it in context, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
Ranked by age, 20th oldest of 41 French towns this size
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
The youngest is Villejust (37.2), the oldest Prayssac (62.3).
Among its 6 nearest neighbors, 2 are older than Illy
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Illy | 45.7 | 21% | 1.5% | 3.4% |
| Sedan 16,667 · 2.8 mi | 45 | 24% | 1.3% | 8% |
| Vrigne aux Bois 3,518 · 4.7 mi | 44.9 | 22% | 1.2% | 4.3% |
| Vivier-au-Court 2,732 · 6.1 mi | 42.4 | 20% | 0.4% | 11% |
| Villers-Semeuse 3,615 · 9.7 mi | 49.6 | 27% | 0.5% | 5.8% |
| Nouzonville 5,523 · 11.1 mi | 46 | 23% | 0.9% | 6.2% |
| Charleville-Mézières 45,560 · 11.1 mi | 43.4 | 23% | 2.3% | 11% |
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 Illy
What is the population of Illy?
413 at INSEE’s 2023 census, 4% more than in 2012 (396).
How old are Illy’s residents?
The median age is 45.7, older than 61% of compared French towns. 20% are under 18 and 21% 65 or older.
How many second homes are there in Illy?
3, with occasional dwellings: 1.5% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Illy?
INSEE counts 14 immigrants (born abroad, not French at birth), 3.4% of residents, and 8 foreign nationals (1.9%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Illy?
€24,780 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 October 30, 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.