Only 8.2% of homes are flats in Janville
Second homes are rarer here than in 99% of compared French towns. Locally, nearly a third of households are couples with children. Janville is home to 640 residents in 270 households, by the 2023 Census. 21% of households are headed by a manager or professional, against 9.4% in the typical compared French town.
Throughout this page, the Oise 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 Janville
Fewer residents than in 2012
Janville had 731 residents at the 2012 census and 640 in 2023, down 12%: slower growth than in 98% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Slower growth than 98% of compared French towns: Janville changed by −12% since 2012
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 Oise town changed +2% and the median compared French town +5%. Between 2012 and 2017 the population moved −7%, then −6% to 2023.
Below 77% of compared French towns: 18% of residents are 65 or over
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Janville 45.2. The median compared French town: 44.
With a median age of 45.2, Janville is older than 58% of compared French towns. To put it in context, 22% of residents are 65 or over in the typical compared French town. On the census count, 9.9% of residents are 15 to 24.
Women and men · all residents
51% women, 49% men
About an even split. Median share of women: Oise 51.7%, France 51.8%.
In Janville, 33% of households are one person living alone, fewer than in 63% 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 Oise median and the France median
Living alone · share
The average household has 2.3 people. Typically, 35% of households are one person living alone in the typical compared French town. Single-parent households are rarer here than in 99% of compared French towns.
Households without a car make up 6.2% in Janville, less than in 79% 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
One household in 16 has no car (median compared French town: 11%). Here, 6.9% of homes stand empty. Households in social housing are rarer here than in 99% of compared French towns.
A typical living standard of €25,300 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.
Half of residents live in households above €25,300 a year per consumption unit and half below; the level is lower than in 57% of compared French towns.
In Janville, 24% of households are headed by a manual worker, more than in 95% 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
27% of households are headed by a retired person (typical compared French town: 32%). The wider picture: 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).
More immigrants than 61% of compared French towns: 8.1%
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.
The share of foreign nationals is 5.5%, against 4.3% in the typical compared French town. Typically, 6.5% of residents are immigrants in the typical compared French town. The median compared commune in Oise has 7.4%; immigrants here make up a share higher than in 61% 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.
Janville sits above 88% of compared French towns for married residents (49%)
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
Just over a fifth of residents 15 and over are single (typical compared French town: 25%). The share of married residents in the typical compared French town is 43%.
In Janville, 25% of adults out of school hold a higher-education qualification, fewer than in 67% of compared French towns
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
Just over a fifth of adults out of school have no qualification (typical compared French town: 19%). In the typical compared French town, graduates of higher education come to 30%.
41 French towns of 640 to 2,582 people: this is the 21st 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.
Villejust is the youngest (37.2); Prayssac the oldest (62.3).
Janville sits below 1 of its 6 closest neighbors on median age
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Janville | 45.2 | 18% | 0% | 8.1% |
| Longueil-Annel 2,586 · 0.9 mi | 42 | 20% | 1% | 6.6% |
| Choisy-au-Bac 3,449 · 1.2 mi | 44.9 | 25% | 2.3% | 6.6% |
| Thourotte 4,463 · 1.9 mi | 47.2 | 27% | 0.8% | 6.8% |
| Margny-lès-Compiègne 8,677 · 2.7 mi | 37.8 | 16% | 2% | 14% |
| Venette 2,758 · 3.7 mi | 41.1 | 19% | 1.9% | 7.9% |
| Compiègne 40,761 · 3.8 mi | 37.6 | 19% | 2.2% | 17% |
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 Janville
What is the population of Janville?
640 at INSEE’s 2023 census, 12% fewer than in 2012 (731).
How old are Janville’s residents?
The median age is 45.2, older than 58% of compared French towns. 21% are under 18 and 18% 65 or older.
How many second homes are there in Janville?
0, with occasional dwellings: 0% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Janville?
INSEE counts 52 immigrants (born abroad, not French at birth), 8.1% of residents, and 35 foreign nationals (5.5%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Janville?
€25,300 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.