A lower share of flats than 99% of compared French towns, at 1%
Here nearly a quarter of households are one person living alone, where the figure in the typical compared French town is 35%. Locally, 2.8% of households rent social housing (HLM). Few places have so few households without a car: 4.2% here, fewer than in 93% of compared French towns. The 2023 Census put Bio’s population at 350, in 150 households.
Throughout this page, the Lot 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 Bio
One home in six is a second home
The census counted 37 second homes and occasional dwellings in Bio, 18% of its 210 homes: higher than in 92% 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 ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Bio: 18% of homes are second homes, above 92% 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
Where 6.7% of homes stand empty in the typical compared French town, Bio has 10%. Across the comparison, 2.1% of homes are second homes in the typical compared French town. 20% of households have been in place 30 years or more; 8.1% moved in within the last two years.
From 2012 to 2023, Bio outgrew 52% of compared French towns: +5%
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
Fewer residents aged 15 to 24 than 93% of compared French towns: 8%
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Bio 49.7. The median compared French town: 44.
Half of Bio’s residents are over 49.7, older than in just over four fifths of compared French towns. Residents aged 65 and over make up about one in five here (21%). As a yardstick, 11% of residents are 15 to 24 in the typical compared French town.
Women and men · all residents
51% women, 49% men
About an even split. Median share of women: Lot 53.3%, France 51.8%.
Bio ranks above 80% of compared French towns on couples with children: 31%
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 Lot median and the France median
Living alone · share
Single-parent households are rarer here than in 99% of compared French towns. The wider picture: 25% of households are couples with children in the typical compared French town. The typical household size is 2.4 people.
The middle resident’s standard of living: €26,030 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.
Per consumption unit, half of residents live on more than €26,030 a year: higher than in 51% of compared French towns.
In Bio, 3.3% of households are headed by a manager or professional, fewer than in 96% 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
With households headed by a manual worker at 13%, Bio is behind 60% of compared French towns on that count. By way of comparison, 9.4% of households are headed by a manager or professional in the typical compared French town. A third of households are headed by a retired person.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Immigrants make up 2.8% in Bio, less than in 84% 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.
With foreign nationals at 1.7%, Bio is behind 83% of compared French towns on that count. The median compared commune in Lot has 9.5%; immigrants here make up a share lower than in 84% of compared French towns. The wider picture: 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.
In Bio, 21% of residents 15 and over are single, fewer than in 87% of compared French towns
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 (47%), Bio is above three quarters of compared French towns. Single residents: 25% in the typical compared French town, for comparison.
Only 9.4% of adults out of school have no qualification in Bio
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
In the typical compared French town, the share of graduates of higher education is 30%; Bio has 39%. Set beside that, 19% of adults out of school have no qualification in the typical compared French town.
Of 41 French towns its size (350 to 2,582 people), the 14th 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.
Ages run from 37.2 in Villejust to 62.3 in Prayssac.
Of the 4 towns nearest Bio, 3 are older
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Bio | 49.7 | 21% | 18% | 2.8% |
| Gramat 3,512 · 3 mi | 55.1 | 36% | 9.4% | 9.5% |
| Saint-Céré 3,429 · 7.3 mi | 54.6 | 36% | 7.6% | 8% |
| Figeac 9,793 · 16.8 mi | 48.2 | 29% | 4.3% | 8.7% |
| Souillac 3,192 · 17.4 mi | 52.6 | 35% | 12% | 13% |
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 Bio
What is the population of Bio?
350 at INSEE’s 2023 census, 5% more than in 2012 (332).
How old are Bio’s residents?
The median age is 49.7, older than 82% of compared French towns. 19% are under 18 and 21% 65 or older.
How many second homes are there in Bio?
37, with occasional dwellings: 18% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Bio?
INSEE counts 10 immigrants (born abroad, not French at birth), 2.8% of residents, and 6 foreign nationals (1.7%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Bio?
€26,030 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.