Households headed by a manager or professional: 23%, a higher share than 92% of compared French towns
Here 27% of households rent social housing (HLM), where the figure in the typical compared French town is 12%. Senlis is home to 15,157 residents in 6,910 households, by the 2023 Census. For Senlis, the census puts flats at 62%. More empty homes than in 77% of compared French towns: 9.6%.
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.
From 2012 to 2023, 85% of compared French towns grew faster than Senlis: −4%
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 first five years brought −10%; the six to 2023, +6%. For comparison, the median compared French town changed +5% and the median Oise town +2%.
Senlis sits below 70% of compared French towns for residents aged 65 and over (19%)
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Senlis 42.2. The median compared French town: 44.
The median age in Senlis is 42.2, lower than in 64% of compared French towns. In Senlis, 10% of residents are 15 to 24. For comparison, 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
52% women, 48% men
About 93 men for every 100 women. Median share of women: Oise 51.7%, France 51.8%.
Senlis sits above 65% of compared French towns for one-person households (39%)
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
12% of households are single parents; in the typical compared French town the figure is 10%. Across the comparison, 35% of households are one person living alone in the typical compared French town. A household here holds 2.1 people on average. Senlis has fewer couples with children than 54% of compared French towns, at 25%.
A town of second homes: 2.9% of its homes
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
Of all households, 13% moved in during the last two years and 15% have stayed three decades or more. Households without a car are more common here than in 54% of compared French towns. Across the comparison, 2.1% of homes are second homes in the typical compared French town.
€29,500 a year: the median 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.
Per consumption unit, half of residents live on more than €29,500 a year: higher than in 82% of compared French towns. 12.0% of residents live below the poverty line INSEE uses.
Below 84% of compared French towns: 8.6% of households are headed by a manual worker
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
With households headed by a retired person at 28%, Senlis is behind nearly three quarters of compared French towns on that count. The usual figure: 14% of households are headed by a manual worker in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
A higher share of immigrants than 76% of compared French towns, at 12%
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 Senlis, 8.7% of residents are foreign nationals, beside 4.3% in the typical compared French town. Against 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.
27% of residents 15 and over are single, more than in 65% 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
Fewer married residents than in 54% of compared French towns: 42%. Elsewhere, 25% of residents 15 and over are single in the typical compared French town.
In Senlis, 46% of adults out of school hold a higher-education qualification, more than in 89% 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
In the typical compared French town, nearly a fifth of adults out of school have no qualification; in Senlis, 15%. Graduates of higher education make up 30% in the typical compared French town.
The 19th oldest of 41 French towns of 14,732 to 15,583 people
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
The youngest is Lognes (34.9), the oldest Saint-Jean-de-Luz (54.3).
A younger town than 3 of the 6 around it: Senlis
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Senlis | 42.2 | 19% | 2.9% | 12% |
| Chantilly 10,591 · 5.6 mi | 44 | 23% | 3.9% | 11% |
| Verneuil-en-Halatte 4,775 · 5.8 mi | 44.4 | 19% | 0.6% | 5.8% |
| Orry-la-Ville 3,583 · 5.9 mi | 45.1 | 22% | 2.3% | 7.4% |
| Creil 36,301 · 6.1 mi | 31.8 | 11% | 0.6% | 34% |
| La Chapelle-en-Serval 3,084 · 6.1 mi | 38.2 | 12% | 1.9% | 8.6% |
| Saint-Maximin 3,335 · 6.4 mi | 36.4 | 15% | 0.5% | 14% |
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 Senlis
What is the population of Senlis?
15,157 at INSEE’s 2023 census, 4% fewer than in 2012 (15,789).
How old are Senlis’ residents?
The median age is 42.2, younger than 64% of compared French towns. 23% are under 18 and 19% 65 or older.
How many second homes are there in Senlis?
230, with occasional dwellings: 2.9% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Senlis?
INSEE counts 1,750 immigrants (born abroad, not French at birth), 12% of residents, and 1,320 foreign nationals (8.7%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Senlis?
€29,500 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 October 30, 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.