Only 2.8% of homes are flats in Sinceny
In Sinceny, 3.8% of households rent social housing (HLM), beside 12% in the typical compared French town. Households headed by a manual worker come to 21% in the town, about two in ten. On empty homes, Sinceny sits higher than 83% of compared French towns: 11%. The 2023 Census put the town’s population at 2,005, in 910 households.
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.
Sinceny changed by −4% from 2012 to 2023, slower than 85% 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 −2%, then −2% to 2023.
Half of Sinceny is over 47.5, older than 72% 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
■ Sinceny 47.5. The median compared French town: 44.
Residents aged 15 to 24: 10%, below 63% of compared French towns.
Women and men · all residents
51% women, 49% men
About 95 men for every 100 women. Median share of women: Aisne 52.5%, France 51.8%.
In Sinceny, 8.1% of households are single parents, fewer than in 78% 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
27% of households are couples with children; in the typical compared French town the figure is 25%. Sinceny has fewer one-person households than 64% of compared French towns, at 33%. Set beside that, 10% of households are single parents in the typical compared French town. The average household has 2.2 people.
Sinceny ranks below 66% of compared French towns on households without a car: 8.1%
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
By its share of second homes (0.9%), Sinceny is below 83% of compared French towns. 7.6% of households arrived within the last two years, while 27% have stayed 30 years or more. Households without a car: 11% in the typical compared French town, for comparison.
€24,240 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.
The median standard of living in Sinceny is €24,240 a year per consumption unit: lower than in 68% of compared French towns. Under the poverty line sit 15.0% of residents.
Households headed by a manager or professional: 5.9%, a lower share than 77% 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
Just over a third of households are headed by a retired person; in the typical compared French town the figure is 32%. To put it in context, nearly one in ten households are headed by a manager or professional in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Immigrants: 1.4%, a lower share than 97% 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.
Here 1.1% of residents are foreign nationals, where the figure in the typical compared French town is 4.3%. Typically, 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.
22% of residents 15 and over are single, fewer than in 81% 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
44% of residents 15 and over are married. In the typical compared French town, the share of single residents is 25%.
A smaller share of graduates of higher education than 86% of compared French towns: 20%
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
With adults with no qualification at 24%, Sinceny is ahead of 75% of compared French towns on that count. For comparison, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
Of 41 French towns its size (2,005 to 2,582 people), the 15th 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.
The youngest is Villejust (37.2), the oldest Prayssac (62.3).
Sinceny is older than every town around it
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 Sinceny
What is the population of Sinceny?
2,005 at INSEE’s 2023 census, 4% fewer than in 2012 (2,088).
How old are Sinceny’s residents?
The median age is 47.5, older than 72% of compared French towns. 21% are under 18 and 24% 65 or older.
How many second homes are there in Sinceny?
9, with occasional dwellings: 0.9% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Sinceny?
INSEE counts 29 immigrants (born abroad, not French at birth), 1.4% of residents, and 22 foreign nationals (1.1%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Sinceny?
€24,240 a year per consumption unit in 2023 (median of compared French towns €25,970); 15.0% 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.