Saint-Martin-le-Châtel sits below 99% of compared French towns for flats (2%)
Single-parent households: 4.4% here and 10% in the typical compared French town. Saint-Martin-le-Châtel is home to 796 residents in 330 households, by the 2023 Census. For Saint-Martin-le-Châtel, the census puts households without a car at 4.9%. 7.4% of households are headed by a manual worker, fewer than in 89% of compared French towns.
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.
Since 2012, Saint-Martin-le-Châtel has changed by ±0%, slower than 70% 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 change was −1% from 2012 to 2017 and +1% from 2017 to 2023. The median compared French town changed +5% over the same years, the median Ain town +13%.
Below 72% of compared French towns: 9.5% of residents are 15 to 24
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Saint-Martin-le-Châtel 44.1. The median compared French town: 44.
Just over a fifth of residents are 65 or over, a lower share than in 53% of compared French towns. As a yardstick, 11% of residents are 15 to 24 in the typical compared French town.
Women and men · all residents
49% women, 51% men
About an even split. Median share of women: Ain 51.0%, France 51.8%.
Only 23% of households are one person living alone in Saint-Martin-le-Châtel
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
The average household has 2.4 people. For comparison, 35% of households are one person living alone in the typical compared French town. On couples with children, Saint-Martin-le-Châtel sits higher than 83% of compared French towns: 32%.
Fewer households in social housing than 92% of compared French towns: 3.6%
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
Second homes make up 2.8%, close to the figure in the typical compared French town. Elsewhere, just over one in ten households rent social housing (HLM) in the typical compared French town. Newcomers of less than two years account for 6.3% of households, residents of 30 years or more for 29%. Few places have so few empty homes: 5.5% here, fewer than in 67% of compared French towns.
A typical living standard of €28,540 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.
At €28,540 a year per consumption unit, the median standard of living here is higher than in 75% of compared French towns.
Above 71% of compared French towns: 36% of households are headed by a retired person
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
Set against 9.4% in the typical compared French town, 12% of households are headed by a manager or professional in Saint-Martin-le-Châtel. As a reference point, 32% of households are headed by a retired person in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
2.2% of residents are immigrants, fewer than in 89% 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.
Foreign nationals: 1.6% here and 4.3% in the typical compared French town. Set beside that, 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.
Only 18% of residents 15 and over are single in Saint-Martin-le-Châtel
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
53% of residents 15 and over are married; in the typical compared French town the figure is 43%. The share of single residents in the typical compared French town is 25%.
Below 69% of compared French towns: 16% of adults out of school have no qualification
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
The share of graduates of higher education tops 57% of compared French towns: 32%. To put it in context, nearly a fifth of adults out of school have no qualification in the typical compared French town.
Among 41 French towns of 796 to 2,582 people, the 16th youngest
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.
Older than Saint-Martin-le-Châtel: 3 of the 6 towns nearby
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Saint-Martin-le-Châtel | 44.1 | 22% | 2.8% | 2.2% |
| Attignat 3,409 · 2 mi | 42.1 | 19% | 1.2% | 3.7% |
| Polliat 2,741 · 2.5 mi | 45.7 | 24% | 1.2% | 2.6% |
| Montrevel-en-Bresse 2,743 · 3.4 mi | 49.6 | 31% | 2.3% | 4.4% |
| Viriat 7,102 · 5.3 mi | 43 | 20% | 1.8% | 6.8% |
| Saint-Denis-lès-Bourg 6,160 · 6.7 mi | 49.2 | 27% | 1.2% | 8.2% |
| Bourg-en-Bresse 42,372 · 7.6 mi | 41.4 | 23% | 2.5% | 19% |
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-Martin-le-Châtel
What is the population of Saint-Martin-le-Châtel?
796 at INSEE’s 2023 census, about the same as in 2012 (796).
How old are Saint-Martin-le-Châtel’s residents?
The median age is 44.1, older than 51% of compared French towns. 23% are under 18 and 22% 65 or older.
How many second homes are there in Saint-Martin-le-Châtel?
10, with occasional dwellings: 2.8% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Saint-Martin-le-Châtel?
INSEE counts 18 immigrants (born abroad, not French at birth), 2.2% of residents, and 13 foreign nationals (1.6%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Saint-Martin-le-Châtel?
€28,540 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.