0.8% of homes are flats, fewer than in 99% of compared French towns
Half of Senan’s residents are over 50.3, older than in 84% of compared French towns. The town had 672 residents in 320 households at the 2023 census. Census figures put households in social housing at 4.1% here. By its share of households without a car (7%), Senan is below 73% of compared French towns.
Throughout this page, the Yonne 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 Senan
Fewer residents than in 2012
Senan had 778 residents at the 2012 census and 672 in 2023, down 14%: slower growth than in 99% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Slower growth than 99% of compared French towns: Senan changed by −14% since 2012
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
From 2012 to 2017 the population moved −10%, and from 2017 to 2023 −4%; the median compared French town changed +5% and the median Yonne town −4%.
In Senan, 28% of residents are 65 or over, more than in 81% 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
■ Senan 50.3. The median compared French town: 44.
10% of residents are 15 to 24 (typical compared French town: 11%). As a yardstick, 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: Yonne 52.2%, France 51.8%. Women live longer than men, so towns with many older residents have more women.
Fewer couples with children than 69% 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 Yonne median and the France median
Living alone · share
A household here holds 2.1 people on average. Lower than in 66% of compared French towns: 32% of households are one person living alone. For couples with children, the comparison in the typical compared French town is 25%. With single-parent households at 11%, Senan is ahead of 62% of compared French towns on that count.
Empty homes make up 11% in Senan, more than in 84% 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
4.7% of homes are second homes (typical compared French town: 2.1%). For empty homes, the comparison in the typical compared French town is 6.7%.
Median standard of living: €25,360 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.
The midpoint of living standards here is €25,360 a year per consumption unit, lower than in 56% of compared French towns.
Senan sits above 96% of compared French towns for households headed by a manual worker (25%)
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
In the typical compared French town, nearly one in ten households are headed by a manager or professional; in Senan, 12%. Households headed by a retired person come to 29% locally, about three in ten. The benchmark for households headed by a manual worker in the typical compared French town: 14%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
A lower share of foreign nationals than 92% of compared French towns, at 1.2%
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.
3.1% of residents are immigrants (typical compared French town: 6.5%). Against that, 4.3% of residents are foreign nationals in the typical compared French town. That is lower than in just over four fifths of compared French towns; the median compared commune in Yonne has 9.2%.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Single residents: 20%, a lower share than 92% 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
In the median compared French town 43% are married and 6.1% in a PACS; here it is 47% and 5%, and 6.8% are widowed. Set beside that, 25% of residents 15 and over are single in the typical compared French town.
Below 76% of compared French towns: 23% of adults out of school hold a higher-education 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
In the typical compared French town, 19% of adults out of school have no qualification; in Senan, 23%. Set beside that, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
14th highest median age among 41 French towns of 672 to 2,582
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.
Senan is younger than 3 of its 6 nearest neighbors
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
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 Senan
What is the population of Senan?
672 at INSEE’s 2023 census, 14% fewer than in 2012 (778).
How old are Senan’s residents?
The median age is 50.3, older than 84% of compared French towns. 18% are under 18 and 28% 65 or older.
How many second homes are there in Senan?
18, with occasional dwellings: 4.7% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Senan?
INSEE counts 21 immigrants (born abroad, not French at birth), 3.1% of residents, and 8 foreign nationals (1.2%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Senan?
€25,360 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.