Blacy is older than 94% of compared French towns: a median age of 55.3
Couples with children are rarer here than in 99% of compared French towns. Flats: 4.7% of the total. Compared with 12% in the typical compared French town, 1.9% of households rent social housing (HLM) here.
Throughout this page, the Yonne 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 Blacy
One home in three is a second home
The census counted 28 second homes and occasional dwellings in Blacy, 33% of its 84 homes: higher than in 95% of compared French towns. 100% of them are houses. Their owners live elsewhere, so they aren’t in the population figures on this page. Homes & cars ↓
An older town
Half of Blacy’s residents are under 55.3 and half over; the median of compared French towns is 44. 33% are 65 or older (France median 22%), 11% 80 or older. Ages ↓
Fewer residents than in 2012
Blacy had 108 residents at the 2012 census and 99 in 2023, down 8%: slower growth than in 95% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Blacy: 33% of homes are second homes, above 95% 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 the typical compared French town, the share of households without a car is 11%; Blacy has 7.5%. As a yardstick, 2.1% of homes are second homes in the typical compared French town. Census figures put empty homes at 4.7% here.
Blacy changed by −8% from 2012 to 2023, behind 95% 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 median compared French town changed +5% over the same years, the median Yonne town −4%.
In Blacy, 6% of residents are 15 to 24, fewer than in 99% 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
■ Blacy 55.3. The median compared French town: 44.
33% of residents are 65 or over (typical compared French town: 22%). Measured more widely, 11% of residents are 15 to 24 in the typical compared French town.
Women and men · all residents
54% women, 46% men
About 85 men for every 100 women. Median share of women: Yonne 52.2%, France 51.8%. Women live longer than men, so towns with many older residents have more women.
In Blacy, 22% of households are single parents, more than in 99% 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 Yonne median and the France median
Living alone · share
On average, 1.9 people share a household. Measured more widely, 10% of households are single parents in the typical compared French town. One-person households are rarer here than in nearly three fifths of compared French towns.
Households headed by a retired person: 67%, a higher share than 99% 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
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
A lower share of foreign nationals than 94% of compared French towns, at 1%
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 82% of compared French towns; the median compared commune in Yonne has 9.2%. Foreign nationals: 4.3% in the typical compared French town, for comparison. The census found that 3% of residents are immigrants in Blacy.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Below 99% of compared French towns: 17% of residents 15 and over are single
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 (46%), Blacy is above 73% of compared French towns. Single residents make up 25% in the typical compared French town.
33% of adults out of school hold a higher-education qualification, a share 61% of compared French towns don’t reach
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
20% of adults out of school have no qualification, more than in 57% of compared French towns. Measured more widely, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
Among 41 French towns of 99 to 2,582 people, the 5th oldest
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.
No nearby town is as old as Blacy
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Blacy | 55.3 | 33% | 33% | 3% |
| Avallon 6,305 · 8.5 mi | 50.5 | 30% | 5.6% | 12% |
| Montbard 4,639 · 14.3 mi | 52.9 | 33% | 3.8% | 7.3% |
| Semur-en-Auxois 3,986 · 14.9 mi | 50.9 | 29% | 9.3% | 5.6% |
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 Blacy
What is the population of Blacy?
99 at INSEE’s 2023 census, 8% fewer than in 2012 (108).
How old are Blacy’s residents?
The median age is 55.3, older than 94% of compared French towns. 15% are under 18 and 33% 65 or older.
How many second homes are there in Blacy?
28, with occasional dwellings: 33% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Blacy?
INSEE counts 3 immigrants (born abroad, not French at birth), 3% of residents, and 1 foreign nationals (1%). The medians of compared French towns are 6.5% and 4.3%.
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.