In Le Sen, 37% of households are couples with children, more than in 96% of compared French towns
Residents aged 65 and over: 29% here and 22% in the typical compared French town. In 2023, the Census found 215 residents in Le Sen, living in 91 households. Across Le Sen, 5.1% of homes are flats. Lower than in 80% of compared French towns: 26% of households are headed by a retired person.
Throughout this page, the Landes 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 Le Sen
One home in seven is a second home
The census counted 17 second homes and occasional dwellings in Le Sen, 15% of its 120 homes: higher than in 91% of compared French towns. 100% of them are houses. Their owners live elsewhere, so they aren’t in the population figures on this page. Homes & cars ↓
A town of families
37% of households are couples with children and 0% single parents with children; 19% of residents are under 15. Households ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
15% of homes are second homes, a share 91% of compared French towns don’t reach
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
Recent arrivals (under two years) make up 6.6% of households; long-stayers (30 years or more) 22%. To put it in context, 2.1% of homes are second homes in the typical compared French town. At 5.5%, the share of households without a car is lower than in 84% of compared French towns. Without a car: one household in 18, against 11% in the median compared French town.
+5% since 2012, a pace 52% of compared French towns didn’t match
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 +11%; from 2017 to 2023, −5%.
In Le Sen, 7% of residents are 15 to 24, fewer than in 97% 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
■ Le Sen 47.9. The median compared French town: 44.
Half of Le Sen’s residents are over 47.9, older than in 74% of compared French towns. Across the comparison, 11% of residents are 15 to 24 in the typical compared French town.
Women and men · all residents
51% women, 49% men
About 95 men for every 100 women. Median share of women: Landes 51.9%, France 51.8%.
A lower share of one-person households than 91% of compared French towns, at 26%
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 Landes median and the France median
Living alone · share
Single-parent households are rarer here than in 99% of compared French towns. One-person households: 35% in the typical compared French town, for comparison. Households here average 2.4 people each.
At the median, €23,650 a year to live on
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 midpoint of living standards here is €23,650 a year per consumption unit, lower than in 75% of compared French towns.
Households headed by a manual worker make up 16% in Le Sen, more than in 62% 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
With households headed by a manager or professional at 11%, Le Sen is ahead of 57% of compared French towns on that count. The comparison figure for households headed by a manual worker is 14% in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Le Sen sits below 99% of compared French towns for foreign nationals (0.5%)
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.
Against a figure of 6.5% in the typical compared French town, the share of immigrants in Le Sen comes in at 2.3%. By way of comparison, 4.3% of residents are foreign nationals in the typical compared French town. Immigrants make up a share lower than in 88% of compared French towns; the median compared commune in Landes has 5.4%.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
17% of residents 15 and over are single, below 99% 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
Married residents: 53%, above 98% of compared French towns. In the typical compared French town, single residents come to 25%.
Graduates of higher education make up 19% in Le Sen, less than in 88% 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
Higher than in 51% of compared French towns: 19% of adults out of school have no qualification. The comparison figure for graduates of higher education is 30% in the typical compared French town.
41 French towns of 215 to 2,582 people: this is 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.
At the ends of the range sit Villejust (37.2), the youngest, and Prayssac (62.3), the oldest.
Le Sen is older than every town around it
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Le Sen | 47.9 | 29% | 15% | 2.3% |
| Mont-de-Marsan 31,592 · 16.3 mi | 42.8 | 22% | 2.9% | 9.3% |
| Saint-Pierre-du-Mont 10,092 · 17.2 mi | 44.5 | 22% | 2.2% | 10% |
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 Le Sen
What is the population of Le Sen?
215 at INSEE’s 2023 census, 5% more than in 2012 (204).
How old are Le Sen’s residents?
The median age is 47.9, older than 74% of compared French towns. 23% are under 18 and 29% 65 or older.
How many second homes are there in Le Sen?
17, with occasional dwellings: 15% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Le Sen?
INSEE counts 5 immigrants (born abroad, not French at birth), 2.3% of residents, and 1 foreign nationals (0.5%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Le Sen?
€23,650 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.