Sainte-Tréphine ranks above 95% of compared French towns on second homes: 28%
The figure for single-parent households is 19% in Sainte-Tréphine and 10% in the typical compared French town. At the 2023 Census Sainte-Tréphine was home to 189 people in 84 households. Put another way, about one in 16: 6.2% of households are headed by a manual worker. Households in social housing are rarer here than in 99% of compared French towns.
Throughout this page, the Côtes-d'Armor 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-Tréphine
One home in four is a second home
The census counted 43 second homes and occasional dwellings in Sainte-Tréphine, 28% of its 150 homes: higher than in 95% 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 ↓
Fewer residents than in 2012
Sainte-Tréphine had 217 residents at the 2012 census and 189 in 2023, down 13%: slower growth than in 99% of compared French towns. Population ↓
Empty homes
The census found 26 homes empty (17%): for sale, to let, awaiting work or simply unused. Homes & cars ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Sainte-Tréphine sits above 98% of compared French towns for empty homes (17%)
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
The share of households without a car trails 63% of compared French towns: 8.5%. In the typical compared French town, empty homes come to 6.7%. Locally, 7.3% of homes are flats.
Sainte-Tréphine changed by −13% from 2012 to 2023, 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
Over the whole period the median compared French town changed +5%, and the median Côtes-d'Armor town +3%. The years 2012 to 2017 brought −14%; 2017 to 2023, +2%.
Sainte-Tréphine is older than 74% of compared French towns: a median age of 48
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Sainte-Tréphine 48. The median compared French town: 44.
Where just over a fifth of residents are 65 or over in the typical compared French town, Sainte-Tréphine has 20%. Residents aged 15 to 24 account for 13%.
Women and men · all residents
49% women, 51% men
About an even split. Median share of women: Côtes-d'Armor 52.9%, France 51.8%.
Below 79% of compared French towns: 19% of households are couples with children
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 Côtes-d'Armor median and the France median
Living alone · share
A household here holds 2.2 people on average. As a yardstick, 25% of households are couples with children in the typical compared French town. One-person households are rarer here than in 70% of compared French towns.
A median standard of living of €21,580 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.
The midpoint of living standards here is €21,580 a year per consumption unit, lower than in 91% of compared French towns.
Sainte-Tréphine sits above 76% of compared French towns for households headed by a retired person (38%)
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
9.4% of households are headed by a manager or professional in the typical compared French town, against 6.2% in Sainte-Tréphine. Across the comparison, 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).
More immigrants than 67% of compared French towns: 9.2%
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 figure for foreign nationals is 6.5% in Sainte-Tréphine and 4.3% 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.
A higher share of married residents than 93% of compared French towns, at 51%
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
On the census count, just over a quarter of residents 15 and over are single. In the typical compared French town, the share of married residents is 43%.
Fewer graduates of higher education than 83% of compared French towns: 21%
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
Adults with no qualification: nearly a fifth of the total. The share of graduates of higher education in the typical compared French town is 30%.
The 15th oldest of 41 French towns of 189 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).
Nearby, 4 of 5 towns have older populations than Sainte-Tréphine
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
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-Tréphine
What is the population of Sainte-Tréphine?
189 at INSEE’s 2023 census, 13% fewer than in 2012 (217).
How old are Sainte-Tréphine’s residents?
The median age is 48, older than 74% of compared French towns. 21% are under 18 and 20% 65 or older.
How many second homes are there in Sainte-Tréphine?
43, with occasional dwellings: 28% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Sainte-Tréphine?
INSEE counts 17 immigrants (born abroad, not French at birth), 9.2% of residents, and 12 foreign nationals (6.5%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Sainte-Tréphine?
€21,580 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 9, 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.