Second homes: 26%, a higher share than 94% of compared French towns
24% of households are one person living alone; in the typical compared French town the figure is 35%. Households without a car: 3.5% of the total. Few places have so few households in social housing: 1.8% here, fewer than in 97% of compared French towns. There were 270 households in Cassen at the 2023 Census, home to 624 residents.
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 Cassen
One home in four is a second home
The census counted 100 second homes and occasional dwellings in Cassen, 26% of its 400 homes: higher than in 94% of compared French towns. 98% of them are houses. Their owners live elsewhere, so they aren’t in the population figures on this page. Homes & cars ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Fewer flats than 96% of compared French towns: 4.8%
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
18% of households have been in place 30 years or more; 11% moved in within the last two years. On empty homes, Cassen sits lower than 59% of compared French towns: 6.1%.
Cassen grew +10% from 2012 to 2023, faster than 70% 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
Between 2012 and 2017 the population moved +2%, then +8% to 2023. Over those years, the median Landes town changed +9% and the median compared French town +5%.
Below 84% of compared French towns: 8.8% of residents are 15 to 24
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Cassen 43.1. The median compared French town: 44.
Half of Cassen’s residents are under 43.1, younger than in 58% of compared French towns. In Cassen, a fifth of residents are 65 or over. For comparison, 11% of residents are 15 to 24 in the typical compared French town.
Women and men · all residents
49% women, 51% men
About an even split. Median share of women: Landes 51.9%, France 51.8%.
29% of households are couples with children, a share 73% of compared French towns don’t reach
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
Compared with 10% in the typical compared French town, just over one in ten households are single parents here. As a yardstick, a quarter of households are couples with children in the typical compared French town. A household here holds 2.3 people on average.
A typical living standard of €24,750 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 €24,750 a year: lower than in 63% of compared French towns.
Cassen ranks above 76% of compared French towns on households headed by a manual worker: 18%
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
The share of households headed by a retired person stands at 33%. Few places have so few households headed by a manager or professional: 9% here, fewer than in 53% of compared French towns.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Only 2.8% of residents are immigrants in Cassen
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.
3% of residents are foreign nationals; in the typical compared French town the figure is 4.3%. That is lower than in 84% of compared French towns; the median compared commune in Landes has 5.4%. To put it in context, 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.
Only 22% of residents 15 and over are single in Cassen
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
Compared with 43% in the typical compared French town, 45% of residents 15 and over are married here. The benchmark for single residents in the typical compared French town: 25%.
Adults with no qualification make up 15% in Cassen, less than in 75% 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
A quarter of Cassen’s residents 15 and over who have left education hold a higher-education diploma, against 30% in the median compared French town; 15% have no diploma (19%).
The 12th youngest of 41 French towns of 624 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.
The youngest is Villejust (37.2), the oldest Prayssac (62.3).
Cassen is younger 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 |
|---|---|---|---|---|
| Cassen | 43.1 | 20% | 26% | 2.8% |
| Pontonx-sur-l'Adour 3,021 · 3.9 mi | 46.9 | 25% | 4.4% | 4.1% |
| Tartas 3,169 · 5.6 mi | 51.8 | 31% | 2.8% | 3.9% |
| Saint-Vincent-de-Paul 3,402 · 6.7 mi | 47.7 | 24% | 2.8% | 5.2% |
| Narrosse 3,387 · 8.6 mi | 49.3 | 27% | 3% | 7.6% |
| Saint-Paul-lès-Dax 14,481 · 10.1 mi | 51.3 | 32% | 10% | 6.6% |
| Dax 22,109 · 10.3 mi | 49.3 | 29% | 17% | 9.7% |
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 Cassen
What is the population of Cassen?
624 at INSEE’s 2023 census, 10% more than in 2012 (567).
How old are Cassen’s residents?
The median age is 43.1, younger than 58% of compared French towns. 21% are under 18 and 20% 65 or older.
How many second homes are there in Cassen?
100, with occasional dwellings: 26% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Cassen?
INSEE counts 18 immigrants (born abroad, not French at birth), 2.8% of residents, and 19 foreign nationals (3%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Cassen?
€24,750 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.