23% of households are one person living alone, below 97% of compared French towns
Compared with 9.4% in the typical compared French town, 24% of households are headed by a manager or professional here. Households without a car account for 4.5%. Flats are rarer here than in 99% of compared French towns. Heilly counted 438 residents and 190 households at the 2023 Census.
Throughout this page, the Somme 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.
+12% since 2012, a pace 76% of compared French towns didn’t match
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
From 2012 to 2017 the population moved +9%, and from 2017 to 2023 +3%; the median compared French town changed +5% and the median Somme town −3%.
Residents aged 15 to 24: 9.2%, a lower share than 78% 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
■ Heilly 43. The median compared French town: 44.
Half of Heilly’s residents are under 43, younger than in 58% of compared French towns. In Heilly, 20% of residents are 65 or over. On average, 11% of residents are 15 to 24 in the typical compared French town.
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Somme 52.5%, France 51.8%.
Single-parent households make up 5.4% in Heilly, less than in 98% 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 Somme median and the France median
Living alone · share
In the typical compared French town, a quarter of households are couples with children; in Heilly, 31%. Set beside that, one in ten households are single parents in the typical compared French town. There are 2.3 people in the average household.
5.6% of homes in Heilly 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
3.1% of households moved in less than two years ago; 29% have been in their home 30 years or more. Set beside that, 2.1% of homes are second homes in the typical compared French town. Households in social housing are rarer here than in 99% of compared French towns. Empty homes: 4.5% here and 6.7% in the typical compared French town.
Per consumption unit, the median standard of living is €28,060 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 €28,060 a year per consumption unit: higher than in 71% of compared French towns.
Households headed by a retired person make up 24% in Heilly, less than in 87% 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
Nearly a fifth of households are headed by a manual worker, against 14% in the typical compared French town. As a reference point, nearly a third of households are headed by a retired person 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 99% of compared French towns: 0.9%
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.
In Heilly, 0.4% of residents are foreign nationals, beside 4.3% in the typical compared French town. For immigrants, the comparison in the typical compared French town is 6.5%.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Heilly sits below 88% of compared French towns for single residents (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
By its share of married residents (48%), Heilly is above 82% of compared French towns. To put it in context, 25% of residents 15 and over are single in the typical compared French town.
Heilly sits below 61% of compared French towns for adults with no qualification (17%)
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
The census found that 30% of adults out of school hold a higher-education qualification in Heilly. As a yardstick, nearly a fifth of adults out of school have no qualification in the typical compared French town.
Of 41 French towns its size (438 to 2,582 people), the 12th 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.
Villejust is the youngest (37.2); Prayssac the oldest (62.3).
Around Heilly, 5 of 6 towns have a higher median age
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
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 Heilly
What is the population of Heilly?
438 at INSEE’s 2023 census, 12% more than in 2012 (390).
How old are Heilly’s residents?
The median age is 43, younger than 58% of compared French towns. 22% are under 18 and 20% 65 or older.
How many second homes are there in Heilly?
12, with occasional dwellings: 5.6% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Heilly?
INSEE counts 4 immigrants (born abroad, not French at birth), 0.9% of residents, and 2 foreign nationals (0.4%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Heilly?
€28,060 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 4, 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.