Castex is older than 99% of compared French towns: a median age of 61.7
Where 14% of households are headed by a manual worker in the typical compared French town, Castex has 38%. At the same time, the town has fewer one-person households than 94% of compared French towns, at 25%. Census day 2023: 75 residents and 40 households in the town. About one in 30: that is how common empty homes are in Castex (3.3%).
Throughout this page, the Gers 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 Castex
One home in three is a second home
The census counted 19 second homes and occasional dwellings in Castex, 31% of its 61 homes: higher than in 95% 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 ↓
An older town
Half of Castex’s residents are under 61.7 and half over; the median of compared French towns is 44. 42% are 65 or older (France median 22%), 8.3% 80 or older. Ages ↓
Fewer residents than in 2012
Castex had 93 residents at the 2012 census and 75 in 2023, down 19%: slower growth than in 99% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Castex sits above 95% of compared French towns for second homes (31%)
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
Car-free households: one in 19, where the median compared French town has 11%. 1.7% of homes are flats, or about one in 59. Households in social housing are rarer here than in 99% of compared French towns. As a yardstick, 2.1% of homes are second homes in the typical compared French town.
A change of −19% since 2012 leaves Castex behind 99% 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
In two steps, −8% to 2017 and −13% after, the town’s change compares with +5% for the median compared French town and ±0% in Gers.
Castex sits above 98% of compared French towns for residents aged 65 and over (42%)
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Castex 61.7. The median compared French town: 44.
6.9% of residents are 15 to 24; in the typical compared French town the figure is 11%. To put it in context, 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
47% women, 53% men
About 112 men for every 100 women. Median share of women: Gers 52.4%, France 51.8%.
Single-parent households: 38%, a higher 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 Gers median and the France median
Living alone · share
Households here average 1.9 people each. Measured more widely, 10% of households are single parents in the typical compared French town.
Castex: 50% of households are headed by a retired person, above 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. As a reference point, 32% 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).
Castex ranks above 69% of compared French towns on immigrants: 9.7%
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.
Foreign nationals make up 6.9%, against 4.3% in the typical compared French town. The median compared commune in Gers has 7.9%; immigrants here make up a share higher than in 69% of compared French towns. For comparison, 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.
Castex sits above 99% of compared French towns for married residents (59%)
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
Nearly a quarter of residents 15 and over are single; in the typical compared French town the figure is 25%. The comparison figure for married residents is 43% in the typical compared French town.
Castex sits below 97% of compared French towns for adults with no qualification (9.4%)
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
About one in three: that is how common graduates of higher education are in Castex (31%). On average, nearly a fifth of adults out of school have no qualification in the typical compared French town.
The 2nd oldest of 41 French towns of 75 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.
Castex 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 |
|---|---|---|---|---|
| Castex | 61.7 | 42% | 31% | 9.7% |
| Mirande 3,457 · 10.5 mi | 53.2 | 34% | 3.8% | 7.9% |
| Vic-en-Bigorre 4,845 · 12.8 mi | 55.9 | 37% | 2.9% | 3.9% |
| Aureilhan 8,031 · 14.1 mi | 49.3 | 28% | 1.2% | 7.5% |
| Séméac 5,236 · 14.7 mi | 50.2 | 27% | 2.3% | 7.8% |
| Bordères-sur-l'Échez 5,399 · 15.6 mi | 43.1 | 22% | 0.8% | 6% |
| Barbazan-Debat 3,478 · 15.7 mi | 50.1 | 30% | 2% | 5.6% |
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 Castex
What is the population of Castex?
75 at INSEE’s 2023 census, 19% fewer than in 2012 (93).
How old are Castex’s residents?
The median age is 61.7, older than 99% of compared French towns. 8.3% are under 18 and 42% 65 or older.
How many second homes are there in Castex?
19, with occasional dwellings: 31% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Castex?
INSEE counts 7 immigrants (born abroad, not French at birth), 9.7% of residents, and 5 foreign nationals (6.9%). The medians of compared French towns are 6.5% and 4.3%.
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.