Above 99% of compared French towns: 40% of households are couples with children
The median age in Sillegny is 39.1, lower than in 84% of compared French towns. The 2023 Census put the town’s population at 657, in 250 households. On the census count, 1.9% of homes stand empty. The figure for households without a car is 2.4% in Sillegny and 11% in the typical compared French town.
Throughout this page, the Moselle 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 Sillegny
A town of families
40% of households are couples with children and 10% single parents with children; 21% of residents are under 15. Households ↓
Growing fast
Sillegny had 429 residents at the 2012 census and 657 in 2023, up 53%: faster growth than in 99% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Sillegny grew +53% from 2012 to 2023, ahead of 99% 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
Medians for comparison: +5% across compared French towns, −1% in Moselle. Here the change came as +11% to 2017, then +37% to 2023.
14% of residents are 65 or over, below 95% 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
■ Sillegny 39.1. The median compared French town: 44.
Where 11% of residents are 15 to 24 in the typical compared French town, Sillegny has 7.5%. Across the comparison, 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Moselle 51.8%, France 51.8%.
18% of households are one person living alone, fewer than in 99% 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 Moselle median and the France median
Living alone · share
Average household size: 2.6 people. One-person households make up 35% in the typical compared French town. Single-parent households: 10%, near enough the figure in the typical compared French town.
3.8% of homes are flats, fewer than in 97% 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. Second homes make up about one in 91 here (1.1%). In the typical compared French town, flats come to 30%.
€30,370 a year is the median standard of living here
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 €30,370 a year: higher than in 86% of compared French towns.
20% of households are headed by a manager or professional, a share 88% of compared French towns don’t reach
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 Sillegny, just over a quarter of households are headed by a retired person, beside 32% in the typical compared French town. The comparison figure for households headed by a manager or professional is 9.4% in the typical compared French town. 14% of households are headed by a manual worker, or about one in seven.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
A smaller share of immigrants than 90% of compared French towns: 2.1%
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.
By its share of foreign nationals (0.9%), Sillegny is below 95% of compared French towns. The comparison figure for immigrants is 6.5% in the typical compared French town. The median compared commune in Moselle has 12%; immigrants here make up a share lower than in 90% of compared French towns.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Below 99% of compared French towns: 14% of residents 15 and over are single
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 typical compared French town, 43% of residents 15 and over are married; in Sillegny, 52%. The comparison figure for single residents is 25% in the typical compared French town.
9.8% of adults out of school have no qualification, below 96% 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 graduates of higher education is 39%, against 30% in the typical compared French town. The wider picture: nearly a fifth of adults out of school have no qualification in the typical compared French town.
Ranked by age, 2nd 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.
The youngest is Villejust (37.2), the oldest Prayssac (62.3).
No nearby town is as young as Sillegny
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Sillegny | 39.1 | 14% | 1.1% | 2.1% |
| Marly 10,286 · 5.5 mi | 50.9 | 30% | 0.5% | 6.4% |
| Pagny-sur-Moselle 3,919 · 6.3 mi | 46.3 | 24% | 1.2% | 2.7% |
| Pont-à-Mousson 14,190 · 7.2 mi | 41.3 | 20% | 1.8% | 11% |
| Ars-sur-Moselle 4,616 · 7.4 mi | 44.5 | 20% | 0.6% | 8.6% |
| Montigny-lès-Metz 21,718 · 7.5 mi | 44.1 | 23% | 1.1% | 12% |
| Moulins-lès-Metz 5,265 · 7.7 mi | 45.1 | 25% | 0.9% | 7.9% |
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 Sillegny
What is the population of Sillegny?
657 at INSEE’s 2023 census, 53% more than in 2012 (429).
How old are Sillegny’s residents?
The median age is 39.1, younger than 84% of compared French towns. 24% are under 18 and 14% 65 or older.
How many second homes are there in Sillegny?
3, with occasional dwellings: 1.1% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Sillegny?
INSEE counts 14 immigrants (born abroad, not French at birth), 2.1% of residents, and 6 foreign nationals (0.9%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Sillegny?
€30,370 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 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.