A lower share of households headed by a manager or professional than 99% of compared French towns, at 2.1%
Residents aged 15 to 24: 7.6%, below 95% of compared French towns. Flats make up about one in 14 here (7.4%). 32% of households are couples with children, more than in 84% of compared French towns. Siersthal had 646 residents in 250 households at the 2023 census.
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 Siersthal
Empty homes
The census found 33 homes empty (11%): for sale, to let, awaiting work or simply unused. Homes & cars ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Siersthal changed by +1% from 2012 to 2023, slower than 65% 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
From 2012 to 2017 the change was +4%; from 2017 to 2023, −3%. Over the same years the median compared French town changed +5%, the median Moselle town −1%.
A median age of 50.3: Siersthal is older than 84% 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
■ Siersthal 50.3. The median compared French town: 44.
28% of residents are 65 or over; in the typical compared French town the figure is 22%.
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Moselle 51.8%, France 51.8%.
6.1% of households are single parents, fewer than in 95% 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
Here 29% of households are one person living alone, where the figure in the typical compared French town is 35%. In the typical compared French town, the share of single-parent households is 10%. Average household size: 2.4 people.
11% of homes stand empty, more than in 85% 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. As a reference point, 6.7% of homes stand empty in the typical compared French town. 5.9% of households have no car. In the typical compared French town, the share of second homes is 2.1%; Siersthal has 3.5%.
Median standard of living: €24,990 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 median standard of living in Siersthal is €24,990 a year per consumption unit: lower than in 60% of compared French towns.
23% of households are headed by a retired person, fewer than in 90% 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
14% of households are headed by a manual worker in the typical compared French town, against 22% in Siersthal. Across the comparison, nearly a third of households are headed by a retired person in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
A smaller share of immigrants than 64% of compared French towns: 4.9%
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 Siersthal, 3.5% of residents are foreign nationals. The usual figure: 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.
A higher share of married residents than 89% of compared French towns, at 49%
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
Single residents: 22% here and 25% in the typical compared French town. In the typical compared French town, 43% of residents 15 and over are married.
Graduates of higher education make up 17% in Siersthal, less than in 93% 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
Where 19% of adults out of school have no qualification in the typical compared French town, Siersthal has 23%. Typically, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
41 French towns of 646 to 2,582 people: this is the 14th 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.
Villejust is the youngest (37.2); Prayssac the oldest (62.3).
Siersthal sits below 1 of its 6 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 |
|---|---|---|---|---|
| Siersthal | 50.3 | 28% | 3.5% | 4.9% |
| Bitche 4,966 · 3.5 mi | 41 | 23% | 3.1% | 9.9% |
| Ingwiller 3,995 · 13.1 mi | 46 | 26% | 2.1% | 5.6% |
| Sarreguemines 20,143 · 13.6 mi | 48.8 | 26% | 1.6% | 15% |
| Sarre-Union 2,731 · 14.1 mi | 48.8 | 28% | 1.8% | 10% |
| Hambach 2,766 · 14.4 mi | 47.8 | 23% | 1.3% | 9.3% |
| Niederbronn-les-Bains 4,347 · 14.6 mi | 50.9 | 28% | 5.3% | 5.7% |
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 Siersthal
What is the population of Siersthal?
646 at INSEE’s 2023 census, 1% more than in 2012 (638).
How old are Siersthal’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 Siersthal?
10, with occasional dwellings: 3.5% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Siersthal?
INSEE counts 32 immigrants (born abroad, not French at birth), 4.9% of residents, and 22 foreign nationals (3.5%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Siersthal?
€24,990 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.