39% of households are couples with children, a share 98% of compared French towns don’t reach
Here 3.5% of households have no car, where the figure in the typical compared French town is 11%. 3.1% of homes are flats, or about one in 32. Households in social housing are rarer here than in 99% of compared French towns. The 2023 Census counted 351 residents in 140 households.
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 Sarnois
A town of families
39% of households are couples with children and 3.6% single parents with children; 16% of residents are under 15. Households ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Growth of +5% since 2012 puts Sarnois ahead of 51% 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
Over those years, the median Oise town changed +2% and the median compared French town +5%. Between 2012 and 2017 the population moved +4%, then +1% to 2023.
In Sarnois, 16% of residents are 15 to 24, more than in 96% 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
■ Sarnois 44.6. The median compared French town: 44.
17% of residents are 65 or over, against 22% in the typical compared French town. Still, the median age in Sarnois is 44.6, higher than in 53% of compared French towns. Set beside that, 11% of residents are 15 to 24 in the typical compared French town.
Women and men · all residents
52% women, 48% men
About 94 men for every 100 women. Median share of women: Oise 51.7%, France 51.8%.
A smaller share of one-person households than 99% of compared French towns: 21%
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
With single-parent households at 3.6%, Sarnois is behind 99% of compared French towns on that count. The benchmark for one-person households in the typical compared French town: 35%. On average, 2.5 people share a household.
Empty homes make up 9.2% in Sarnois, more than in 74% 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
Long tenure is the mark of 21% of households (30 years or more), short tenure of 7.8% (under two years). For comparison, 6.7% of homes stand empty in the typical compared French town. Second homes are more common here than in 73% of compared French towns.
At the median, €25,510 a year to live on
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.
The midpoint of living standards here is €25,510 a year per consumption unit, lower than in 54% of compared French towns.
25% of households are headed by a manual worker, more than in 96% 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
Households headed by a manager or professional are rarer here than in 99% of compared French towns. As a yardstick, 14% of households are headed by a manual worker in the typical compared French town. Locally, 36% of households are headed by a retired person.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
A lower share of immigrants than 97% of compared French towns, at 1.4%
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 figure for foreign nationals is 0.9% in Sarnois and 4.3% in the typical compared French town. The median compared commune in Oise has 7.4%; immigrants here make up a share lower than in 97% of compared French towns. In the typical compared French town, the share of immigrants is 6.5%.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Single residents: 24%, a lower share than 60% of compared French towns
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
Married residents account for 44%. The usual figure: 25% of residents 15 and over are single in the typical compared French town.
Graduates of higher education: 20%, a lower share than 86% 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
Adults with no qualification are more common here than in 56% of compared French towns. In the typical compared French town, 30% of adults out of school hold a higher-education qualification.
Ranked by age, 17th youngest of 41 French towns this size
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.
Sarnois sits below 3 of its 5 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 |
|---|---|---|---|---|
| Sarnois | 44.6 | 17% | 4.3% | 1.4% |
| Grandvilliers 2,786 · 1.2 mi | 51.1 | 31% | 2% | 2.6% |
| Crèvecœur-le-Grand 3,462 · 8.6 mi | 43.7 | 24% | 1.2% | 1.9% |
| Gournay-en-Bray 5,723 · 16.2 mi | 51.9 | 31% | 1.4% | 4.4% |
| Breteuil 4,222 · 16.9 mi | 42.7 | 23% | 1.3% | 2.8% |
| Forges-les-Eaux 3,642 · 17.3 mi | 55.9 | 36% | 2.7% | 2.1% |
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 Sarnois
What is the population of Sarnois?
351 at INSEE’s 2023 census, 5% more than in 2012 (334).
How old are Sarnois’ residents?
The median age is 44.6, older than 53% of compared French towns. 22% are under 18 and 17% 65 or older.
How many second homes are there in Sarnois?
7, with occasional dwellings: 4.3% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Sarnois?
INSEE counts 5 immigrants (born abroad, not French at birth), 1.4% of residents, and 3 foreign nationals (0.9%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Sarnois?
€25,510 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.