Fewer flats than 99% of compared French towns: 1.1%
5.7% of households are single parents (typical compared French town: 10%). The 2023 Census counted 386 residents in 180 households. For Biaches, the census puts households without a car at 3.3%. Few places have so few households headed by a manager or professional: 2.8% here, fewer than in 98% of compared French towns.
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.
What stands out about the people of Biaches
An older town
Half of Biaches’ residents are under 52.6 and half over; the median of compared French towns is 44. 31% are 65 or older (France median 22%), 5.3% 80 or older. Ages ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Biaches grew +8% from 2012 to 2023, faster than 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
Over those years, the median Somme town changed −3% and the median compared French town +5%. Between 2012 and 2017 the population moved +7%, then +1% to 2023.
A lower share of residents aged 15 to 24 than 99% of compared French towns, at 5.7%
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Biaches 52.6. The median compared French town: 44.
Compared with 22% in the typical compared French town, 31% of residents are 65 or over here. The wider picture: 11% of residents are 15 to 24 in the typical compared French town. The median age in Biaches is 52.6, higher than in 90% of compared French towns.
Women and men · all residents
48% women, 52% men
About 106 men for every 100 women. Median share of women: Somme 52.5%, France 51.8%.
Couples with children: 28%, a higher share than 66% 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
The typical household size is 2.1 people. For couples with children, the comparison in the typical compared French town is 25%. One-person households account for 32%.
Fewer empty homes than 85% of compared French towns: 4.2%
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 Biaches, 0.5% of homes are second homes, beside 2.1% in the typical compared French town. Elsewhere, 6.7% of homes stand empty in the typical compared French town. Long tenure is the mark of 42% of households (30 years or more), short tenure of 6.1% (under two years). Households in social housing are rarer here than in 99% of compared French towns.
A typical living standard of €25,270 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 median standard of living in Biaches is €25,270 a year per consumption unit: lower than in 57% of compared French towns.
A larger share of households headed by a manual worker than 92% of compared French towns: 23%
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
Households headed by a retired person: 37%, above 75% of compared French towns. To put it in context, 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).
In Biaches, 1% of residents are immigrants, fewer than in 99% 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.
Where 4.3% of residents are foreign nationals in the typical compared French town, Biaches has 0.8%. The share of immigrants 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.
Biaches ranks below 99% of compared French towns on single residents: 17%
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 (52%), Biaches is above 96% of compared French towns. Typically, a quarter of residents 15 and over are single in the typical compared French town.
A smaller share of graduates of higher education than 81% of compared French towns: 21%
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
Adults with no qualification make up 23%, against 19% in the typical compared French town. Against that, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
8th highest median age among 41 French towns of 386 to 2,582
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).
Every neighbor is younger than Biaches
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 Biaches
What is the population of Biaches?
386 at INSEE’s 2023 census, 8% more than in 2012 (358).
How old are Biaches’ residents?
The median age is 52.6, older than 90% of compared French towns. 15% are under 18 and 31% 65 or older.
How many second homes are there in Biaches?
1, with occasional dwellings: 0.5% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Biaches?
INSEE counts 4 immigrants (born abroad, not French at birth), 1% of residents, and 3 foreign nationals (0.8%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Biaches?
€25,270 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.