Households without a car make up 2.8% in Saint-Just, less than in 99% of compared French towns
One-person households make up 23%, against 35% in the typical compared French town. In Saint-Just, 3.5% of households rent social housing (HLM). Compared with other places, flats are scarce here: 9.6%, fewer than in 87% of compared French towns. The 2023 Census put the town’s population at 952, in 400 households.
Throughout this page, the Ain 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 Saint-Just
An older town
Half of Saint-Just’s residents are under 52.2 and half over; the median of compared French towns is 44. 26% are 65 or older (France median 22%), 5.4% 80 or older. Ages ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
From 2012 to 2023, Saint-Just outgrew 61% of compared French towns: +8%
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 change was +5%; from 2017 to 2023, +3%.
Half of Saint-Just is over 52.2, older than 89% 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
■ Saint-Just 52.2. The median compared French town: 44.
Residents aged 65 and over: 26% here and 22% in the typical compared French town. For Saint-Just, the census puts residents aged 15 to 24 at 8.2%.
Women and men · all residents
52% women, 48% men
About 92 men for every 100 women. Median share of women: Ain 51.0%, France 51.8%. Women live longer than men, so towns with many older residents have more women.
2.5% of households are single parents, fewer 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 Ain median and the France median
Living alone · share
Households here average 2.3 people each. 28% of households are couples with children, a higher share than in 64% of compared French towns. On average, 10% of households are single parents in the typical compared French town.
8.2% of homes stand empty, more than in 66% 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
1.6% of homes are second homes, about the same as in the typical compared French town. Of all households, 8.1% moved in during the last two years and 24% have stayed three decades or more. Typically, 6.7% of homes stand empty in the typical compared French town.
A typical living standard of €29,740 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 Saint-Just’s residents live in households with a standard of living below €29,740 a year per consumption unit, and half above: higher than in 83% of compared French towns.
Fewer households headed by a manual worker than 93% of compared French towns: 6.3%
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
Here 37% of households are headed by a retired person, where the figure in the typical compared French town is 32%. Set beside that, 14% of households are headed by a manual worker in the typical compared French town. Households headed by a manager or professional are more common here than in 73% of compared French towns.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
In Saint-Just, 2.3% of residents are foreign nationals, fewer than in 74% 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.
4.9% of residents are immigrants; in the typical compared French town the figure is 6.5%. Immigrants make up a share lower than in 64% of compared French towns; the median compared commune in Ain has 8.5%. Across the comparison, 4.3% of residents are foreign nationals 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.
A higher share of married residents than 98% of compared French towns, at 54%
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
In the typical compared French town, the share of single residents is 25%; Saint-Just has 19%. The benchmark for married residents in the typical compared French town: 43%.
Graduates of higher education: 36%, a higher share than 70% 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
16% 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%.
Among 41 French towns of 952 to 2,582 people, the 9th 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.
Saint-Just is older than every town around it
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Saint-Just | 52.2 | 26% | 1.6% | 4.9% |
| Ceyzériat 3,328 · 2.1 mi | 45.1 | 23% | 2.7% | 4.2% |
| Bourg-en-Bresse 42,372 · 2.6 mi | 41.4 | 23% | 2.5% | 19% |
| Péronnas 6,444 · 3.5 mi | 48.1 | 28% | 1.7% | 8.6% |
| Saint-Denis-lès-Bourg 6,160 · 4.1 mi | 49.2 | 27% | 1.2% | 8.2% |
| Viriat 7,102 · 4.6 mi | 43 | 20% | 1.8% | 6.8% |
| Saint-Étienne-du-Bois 2,584 · 6.1 mi | 45.6 | 24% | 1.7% | 4.5% |
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 Saint-Just
What is the population of Saint-Just?
952 at INSEE’s 2023 census, 8% more than in 2012 (885).
How old are Saint-Just’s residents?
The median age is 52.2, older than 89% of compared French towns. 18% are under 18 and 26% 65 or older.
How many second homes are there in Saint-Just?
7, with occasional dwellings: 1.6% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Saint-Just?
INSEE counts 47 immigrants (born abroad, not French at birth), 4.9% of residents, and 22 foreign nationals (2.3%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Saint-Just?
€29,740 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.