A lower share of flats than 99% of compared French towns, at 0.3%
Against a figure of 12% in the typical compared French town, the share of households in social housing in Trédias comes in at 1.3%. On the census count, 4.3% of households are single parents. Few places have as many households headed by a manual worker: 26% here, more than in 97% of compared French towns. This Côtes-d'Armor town had 513 residents in 230 households at the 2023 Census.
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 Trédias
One home in nine is a second home
The census counted 32 second homes and occasional dwellings in Trédias, 11% of its 300 homes: higher than in 88% of compared French towns. 97% of them are houses. Their owners live elsewhere, so they aren’t in the population figures on this page. Homes & cars ↓
Empty homes
The census found 38 homes empty (13%): for sale, to let, awaiting work or simply unused. Homes & cars ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A lower share of households without a car than 98% of compared French towns, at 3.3%
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
Compared with 6.7% in the typical compared French town, 13% of homes stand empty here. Against that, 11% of households have no car in the typical compared French town. Long tenure is the mark of 26% of households (30 years or more), short tenure of 10% (under two years). Second homes are more common here than in 88% of compared French towns.
Since 2012, Trédias has changed by ±0%, slower than 71% 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 same years the median compared French town changed +5%, the median Côtes-d'Armor town +3%.
In Trédias, 13% of residents are 15 to 24, more than in 84% 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
■ Trédias 45.3. The median compared French town: 44.
Half of Trédias’s residents are over 45.3, older than in 59% of compared French towns. Across Trédias, 23% of residents are 65 or over. In the typical compared French town, 11% of residents are 15 to 24.
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%.
A larger share of couples with children than 65% of compared French towns: 28%
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
The average household has 2.2 people. Set beside that, 25% of households are couples with children in the typical compared French town. In the typical compared French town, just over a third of households are one person living alone; in Trédias, 36%.
At the median, €22,930 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.
Per consumption unit, half of residents live on more than €22,930 a year: lower than in 82% of compared French towns.
Households headed by a manager or professional make up 2.1% in Trédias, less than in 99% 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
Here just over a third of households are headed by a retired person, where the figure in the typical compared French town is 32%. Against that, nearly one in ten households are headed by a manager or professional in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
3.2% of residents are immigrants, fewer than in 80% of compared French towns
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.
4.3% of residents are foreign nationals in the typical compared French town, against 2.4% in Trédias. As a reference point, 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.
Below 68% of compared French towns: 40% of residents 15 and over are married
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
The share of single residents stands at 26%. In the typical compared French town, the share of married residents is 43%.
Trédias ranks below 87% of compared French towns on graduates of higher education: 20%
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 adults with no qualification at 17%, Trédias is behind just over three fifths of compared French towns on that count. In the typical compared French town, graduates of higher education come to 30%.
Of 41 French towns its size (513 to 2,582 people), the 21st 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.
Ages run from 37.2 in Villejust to 62.3 in Prayssac.
4 of 6 neighbors are older than Trédias
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Trédias | 45.3 | 23% | 11% | 3.2% |
| Broons 2,943 · 3.2 mi | 48.9 | 30% | 5.7% | 2.2% |
| Jugon-les-Lacs 2,541 · 5.6 mi | 42 | 21% | 20% | 3.6% |
| Caulnes 2,501 · 5.6 mi | 46.1 | 28% | 5.8% | 2.9% |
| Trélivan 2,865 · 7.9 mi | 47.5 | 24% | 2.5% | 2.5% |
| Plénée-Jugon 2,579 · 8.2 mi | 43.8 | 22% | 7.6% | 2.9% |
| Quévert 3,955 · 9.5 mi | 51.9 | 31% | 3.2% | 2.7% |
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 Trédias
What is the population of Trédias?
513 at INSEE’s 2023 census, about the same as in 2012 (514).
How old are Trédias’ residents?
The median age is 45.3, older than 59% of compared French towns. 21% are under 18 and 23% 65 or older.
How many second homes are there in Trédias?
32, with occasional dwellings: 11% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Trédias?
INSEE counts 16 immigrants (born abroad, not French at birth), 3.2% of residents, and 13 foreign nationals (2.4%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Trédias?
€22,930 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.