Photo: Own Herby talk thyme · CC BY-SA 4.0One-person households: 46%, a higher share than 87% of compared French towns
The median age in Châteaulin is 47.4, higher than in 72% of compared French towns. In 2023, the Census found 5,085 residents locally, living in 2,400 households. Across Châteaulin, 5.7% of homes are second homes. By its share of empty homes (9.5%), Châteaulin is above just over three quarters of compared French towns.
Throughout this page, the Finistère 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.
Châteaulin changed by −2% from 2012 to 2023, slower than 78% 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
Between 2012 and 2017 the population moved +1%, then −2% to 2023. Over those years, the median Finistère town changed +4% and the median compared French town +5%.
Residents aged 15 to 24 make up 13% in Châteaulin, more than in 85% 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
■ Châteaulin 47.4. The median compared French town: 44.
Just over a fifth of residents are 65 or over in the typical compared French town, against 24% in Châteaulin.
Women and men · all residents
51% women, 49% men
About an even split. Median share of women: Finistère 51.7%, France 51.8%.
Couples with children make up 18% in Châteaulin, less than in 82% 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 Finistère median and the France median
Living alone · share
12% of households are single parents; in the typical compared French town the figure is 10%. As a reference point, 25% of households are couples with children in the typical compared French town. The average household has 2 people.
16% of households rent social housing (HLM), more than in 64% 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
Compared with 11% in the typical compared French town, 12% of households have no car here. On the census count, 36% of homes are flats.
Half above, half below €24,910 a year in standard of living
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.
Living standards centre on €24,910 a year per consumption unit: lower than in 61% of compared French towns. One measure of hardship: 12.0% of residents are below the poverty line.
Households headed by a manager or professional: 6.7%, a lower share than 71% 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
17% of households are headed by a manual worker, against 14% in the typical compared French town. Still, on households headed by a retired person, Châteaulin sits lower than 62% of compared French towns: 30%. The benchmark for households headed by a manager or professional in the typical compared French town: 9.4%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
In Châteaulin, 4.2% of residents are immigrants, fewer than in 71% 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: 3%, below nearly two thirds of compared French towns. The comparison figure for immigrants is 6.5% in the typical compared French town. The median compared commune in Finistère has 2.4%; immigrants here make up a share lower than in 71% 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.
Châteaulin sits below 89% of compared French towns for married residents (35%)
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
Here a third of residents 15 and over are single, where the figure in the typical compared French town is 25%. The benchmark for married residents in the typical compared French town: 43%.
In Châteaulin, 15% of adults out of school have no qualification, fewer than in 73% 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
The figure for graduates of higher education is 32% in Châteaulin and 30% in the typical compared French town. Set beside that, 19% of adults out of school have no qualification in the typical compared French town.
12th highest median age among 41 French towns of 5,039 to 5,133
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 Bezannes (31.7), the youngest, and Saint-Georges-de-Didonne (67.3), the oldest.
Châteaulin and its 6 nearest towns: 2 of them 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 |
|---|---|---|---|---|
| Châteaulin | 47.4 | 24% | 5.7% | 4.2% |
| Pont-de-Buis-lès-Quimerch 3,663 · 4.4 mi | 43.3 | 19% | 7.4% | 2.9% |
| Pleyben 3,692 · 5.8 mi | 46.6 | 23% | 4.6% | 2.7% |
| Briec 5,816 · 7.9 mi | 42.6 | 19% | 3.9% | 6.3% |
| Plogonnec 3,236 · 9.4 mi | 45.9 | 25% | 6.9% | 2% |
| Châteauneuf-du-Faou 3,651 · 12.3 mi | 51.2 | 30% | 15% | 7.4% |
| Douarnenez 14,068 · 13.5 mi | 55.6 | 35% | 15% | 3.1% |
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 Châteaulin
What is the population of Châteaulin?
5,085 at INSEE’s 2023 census, 2% fewer than in 2012 (5,181).
How old are Châteaulin’s residents?
The median age is 47.4, older than 72% of compared French towns. 18% are under 18 and 24% 65 or older.
How many second homes are there in Châteaulin?
160, with occasional dwellings: 5.7% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Châteaulin?
INSEE counts 210 immigrants (born abroad, not French at birth), 4.2% of residents, and 150 foreign nationals (3%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Châteaulin?
€24,910 a year per consumption unit in 2023 (median of compared French towns €25,970); 12.0% of residents live below the poverty line. 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 9, 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.