A larger share of couples with children than 96% of compared French towns: 37%
Here 1% of homes are flats, where the figure in the typical compared French town is 30%. Lower than in 99% of compared French towns: 1.1% of households have no car. Locally, 26% of households are headed by a retired person.
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 Treslon
A town of families
37% of households are couples with children and 5.3% single parents with children; 18% of residents are under 15. Households ↓
Growing fast
Treslon had 208 residents at the 2012 census and 252 in 2023, up 21%: faster growth than in 92% of compared French towns. Population ↓
Many graduates
48% of residents 15 and over who have left education hold a diploma above the bac, 15% a master’s or more (bac+5). Qualifications ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A +21% change since 2012: faster than 92% 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
Against +5% for the median compared French town and −2% for the median Marne town, the change came in two steps: +16% from 2012 to 2017, then +4% to 2023.
Fewer residents aged 65 and over than 79% of compared French towns: 18%
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Treslon 43.5. The median compared French town: 44.
Half of Treslon’s residents are under 43.5, younger than in 54% of compared French towns. Against that, 22% of residents are 65 or over in the typical compared French town. Locally, just over one in ten residents are 15 to 24.
Women and men · all residents
47% women, 53% men
About 115 men for every 100 women. Median share of women: Marne 52.7%, France 51.8%.
One-person households: 21%, a lower share than 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 Marne median and the France median
Living alone · share
There are 2.5 people in the average household. Single-parent households are rarer here than in 98% of compared French towns. The share of one-person households in the typical compared French town is 35%.
A town of second homes: 3.6% of its homes
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. The wider picture: 2.1% of homes are second homes in the typical compared French town. 4.3% of households arrived within the last two years, while 29% have stayed 30 years or more. Treslon sits close to the norm on empty homes: 6.4%, about the same as in the typical compared French town.
€30,820 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.
At €30,820 a year per consumption unit, the median standard of living here is higher than in 88% of compared French towns.
A higher share of households headed by a manager or professional than 89% of compared French towns, at 21%
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
Set against 14% in the typical compared French town, just over one in ten households are headed by a manual worker in Treslon. In the typical compared French town, nearly one in ten households are headed by a manager or professional.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Treslon sits below 96% of compared French towns for foreign nationals (0.9%)
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.
The share of immigrants is 4.3%, against 6.5% in the typical compared French town. That is lower than in 71% of compared French towns; the median compared commune in Marne has 4.9%.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Below 98% of compared French towns: 18% 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
Married residents: 47%, above 76% of compared French towns. The comparison figure for single residents is 25% in the typical compared French town.
Adults with no qualification make up 7.1% in Treslon, less than in 99% 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
With graduates of higher education at 48%, Treslon is ahead of 91% of compared French towns on that count. The usual figure: nearly a fifth of adults out of school have no qualification in the typical compared French town.
The 13th youngest of 41 French towns of 252 to 2,582 people
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
Ages run from 37.2 in Villejust to 62.3 in Prayssac.
4 of 6 neighbors are older than Treslon
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Treslon | 43.5 | 18% | 3.6% | 4.3% |
| Saint-Brice-Courcelles 3,566 · 7.6 mi | 47.2 | 25% | 0.6% | 3.9% |
| Tinqueux 10,771 · 7.7 mi | 44.4 | 24% | 0.8% | 6.1% |
| Bezannes 5,039 · 7.9 mi | 31.7 | 15% | 2.6% | 7% |
| Fismes 5,850 · 7.9 mi | 43.6 | 23% | 1.5% | 3.1% |
| Reims 177,674 · 9.4 mi | 35.1 | 17% | 3.8% | 14% |
| Cormontreuil 6,534 · 10.3 mi | 50.9 | 31% | 0.8% | 4.9% |
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 Treslon
What is the population of Treslon?
252 at INSEE’s 2023 census, 21% more than in 2012 (208).
How old are Treslon’s residents?
The median age is 43.5, younger than 54% of compared French towns. 24% are under 18 and 18% 65 or older.
How many second homes are there in Treslon?
4, with occasional dwellings: 3.6% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Treslon?
INSEE counts 11 immigrants (born abroad, not French at birth), 4.3% of residents, and 2 foreign nationals (0.9%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Treslon?
€30,820 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.