Empty homes: 20%, a higher share than 99% of compared French towns
Against a figure of 14% in the typical compared French town, the share of households headed by a manual worker in Sainte-Gemme comes in at 9.1%. Its 55 households held 135 residents at the 2023 Census. 2.8% of homes are flats, or about one in 36. Compared with other places, one-person households are scarce here: 27%, fewer than in 88% of compared French towns.
Throughout this page, the Marne 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 Sainte-Gemme
Empty homes
The census found 14 homes empty (20%): for sale, to let, awaiting work or simply unused. Homes & cars ↓
Fewer residents than in 2012
Sainte-Gemme had 146 residents at the 2012 census and 135 in 2023, down 8%: slower growth than in 94% of compared French towns. Population ↓
A young town
Half of Sainte-Gemme’s residents are under 37.5 and half over; the median of compared French towns is 44. 23% are under 15 and 15% are 65 or older. Ages ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A change of −8% since 2012 leaves Sainte-Gemme behind 94% 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 population moved −5%, and from 2017 to 2023 −3%; the median compared French town changed +5% and the median Marne town −2%.
Half of Sainte-Gemme is under 37.5, younger than 90% 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
■ Sainte-Gemme 37.5. The median compared French town: 44.
There is little gap on residents aged 15 to 24: 11%, about the same as in the typical compared French town. Residents aged 65 and over are rarer here than in 91% of compared French towns.
Women and men · all residents
54% women, 46% men
About 86 men for every 100 women. Median share of women: Marne 52.7%, France 51.8%.
27% of households are couples with children, more than in 61% 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 Marne median and the France median
Living alone · share
Average household size: 2.4 people. Single-parent households are rarer here than in 99% of compared French towns. To put it in context, a quarter of households are couples with children in the typical compared French town.
Fewer households without a car than 71% of compared French towns: 7.3%
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. Long tenure is the mark of 40% of households (30 years or more), short tenure of 9.1% (under two years). Across the comparison, 11% of households have no car in the typical compared French town. Little separates the share of second homes here, 2.8%, from the figure in the typical compared French town.
Median living standard: €30,080 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.
Per consumption unit, half of residents live on more than €30,080 a year: higher than in 85% of compared French towns.
18% of households are headed by a retired person, fewer than in 97% 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
Households headed by a manager or professional are rarer here than in 99% of compared French towns. To put it in context, 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).
Sainte-Gemme: 0% of residents are immigrants
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.
The median compared commune in Marne has 4.9%; immigrants here make up a share lower than in 99% 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.
A larger share of married residents than 97% of compared French towns: 52%
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
Set against 25% in the typical compared French town, 20% of residents 15 and over are single in Sainte-Gemme. The share of married residents in the typical compared French town is 43%.
Sainte-Gemme: 33% of adults out of school hold a higher-education qualification, above 59% 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 Sainte-Gemme, 17% of adults out of school have no qualification, beside 19% in the typical compared French town. As a yardstick, 30% of adults out of school hold a higher-education 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.
Villejust is the youngest (37.2); Prayssac the oldest (62.3).
5 of 6 neighbors are older than Sainte-Gemme
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Sainte-Gemme | 37.5 | 15% | 2.8% | 0% |
| Dormans 2,890 · 4.9 mi | 48.9 | 28% | 3.7% | 4.9% |
| Fère-en-Tardenois 2,836 · 8.2 mi | 47.8 | 28% | 1.9% | 3.3% |
| Fismes 5,850 · 11.5 mi | 43.6 | 23% | 1.5% | 3.1% |
| Château-Thierry 15,097 · 14 mi | 41.3 | 22% | 2.4% | 16% |
| Épernay 22,174 · 14.8 mi | 44 | 23% | 5.2% | 11% |
| Bezannes 5,039 · 15.7 mi | 31.7 | 15% | 2.6% | 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 Sainte-Gemme
What is the population of Sainte-Gemme?
135 at INSEE’s 2023 census, 8% fewer than in 2012 (146).
How old are Sainte-Gemme’s residents?
The median age is 37.5, younger than 90% of compared French towns. 26% are under 18 and 15% 65 or older.
How many second homes are there in Sainte-Gemme?
2, with occasional dwellings: 2.8% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Sainte-Gemme?
INSEE counts 0 immigrants (born abroad, not French at birth), 0% of residents, and 0 foreign nationals (0%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Sainte-Gemme?
€30,080 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.