45% of households are headed by a retired person, a share 93% of compared French towns don’t reach
Flats are rarer here than in 99% of compared French towns. The 2023 Census put Châtillon-sur-Oise’s population at 125, in 57 households. The census found that 7.3% of homes are second homes here. Set against 11% in the typical compared French town, 7% of households have no car in the town.
Throughout this page, the Aisne 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.
+1% since 2012, a pace below 67% 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
In two steps, +2% to 2017 and −2% after, the town’s change compares with +5% for the median compared French town and −4% in Aisne.
A median age of 45.7: Châtillon-sur-Oise is older than 61% 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
■ Châtillon-sur-Oise 45.7. The median compared French town: 44.
Residents aged 15 to 24: 9.7% here and 11% in the typical compared French town.
Women and men · all residents
49% women, 51% men
About an even split. Median share of women: Aisne 52.5%, France 51.8%.
In Châtillon-sur-Oise, 27% of households are couples with children, more than in 61% 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 Aisne median and the France median
Living alone · share
There are 2.2 people in the average household. Couples with children make up 25% in the typical compared French town. Compared with other places, single-parent households are scarce here: 9.1%, fewer than in nearly two thirds of compared French towns. With one-person households at 36%, Châtillon-sur-Oise is ahead of 55% of compared French towns on that count.
Châtillon-sur-Oise: 8.8% of homes stand empty, above 71% 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
Households in social housing are rarer here than in 99% of compared French towns. Measured more widely, 6.7% of homes stand empty in the typical compared French town. Car-free households: one in 14, where the median compared French town has 11%.
Per consumption unit, the median standard of living is €24,420 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 Châtillon-sur-Oise’s residents live in households with a standard of living below €24,420 a year per consumption unit, and half above: lower than in 67% of compared French towns.
Households headed by a manual worker make up 9.1% in Châtillon-sur-Oise, less than in 82% 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
About one in 11: that is how common households headed by a manager or professional are in Châtillon-sur-Oise (9.1%). Households headed by a manual worker make up 14% in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Immigrants: 1.6%, a lower share than 95% 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.
In the typical compared French town, 4.3% of residents are foreign nationals; in Châtillon-sur-Oise, 1.6%. Immigrants: 6.5% in the typical compared French town, for comparison.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Châtillon-sur-Oise sits below 92% of compared French towns for single residents (20%)
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
44% of residents 15 and over are married, against 43% in the typical compared French town. The benchmark for single residents in the typical compared French town: 25%.
23% of adults out of school hold a higher-education qualification, fewer than in 77% 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 share of adults with no qualification is 22%, against 19% in the typical compared French town. Against that, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
41 French towns of 125 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).
Of the 6 towns nearest Châtillon-sur-Oise, 1 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 |
|---|---|---|---|---|
| Châtillon-sur-Oise | 45.7 | 24% | 7.3% | 1.6% |
| Gauchy 5,183 · 6.6 mi | 47.7 | 24% | 0.4% | 4% |
| Saint-Quentin 52,813 · 7 mi | 41.3 | 23% | 1.6% | 9% |
| La Fère 2,796 · 9.2 mi | 39.7 | 21% | 2.3% | 5.6% |
| Beautor 2,579 · 9.8 mi | 44.9 | 23% | 0.4% | 5.4% |
| Tergnier 13,045 · 10.7 mi | 42.5 | 21% | 1% | 6.7% |
| Fresnoy-le-Grand 2,890 · 10.8 mi | 44.1 | 23% | 1.2% | 2.7% |
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 Châtillon-sur-Oise
What is the population of Châtillon-sur-Oise?
125 at INSEE’s 2023 census, about the same as in 2012 (124).
How old are Châtillon-sur-Oise’s residents?
The median age is 45.7, older than 61% of compared French towns. 18% are under 18 and 24% 65 or older.
How many second homes are there in Châtillon-sur-Oise?
5, with occasional dwellings: 7.3% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Châtillon-sur-Oise?
INSEE counts 2 immigrants (born abroad, not French at birth), 1.6% of residents, and 2 foreign nationals (1.6%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Châtillon-sur-Oise?
€24,420 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.