In Trézilidé, 39% of households are couples with children, more than in 98% of compared French towns
Residents aged 65 and over: 15%, below 89% of compared French towns. Lower than in 99% of compared French towns: 1.3% of households have no car. At the 2023 Census, 405 people lived in Trézilidé, in 160 households. Flats account for 1.2%.
Throughout this page, the Finistère 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 Trézilidé
A town of families
39% of households are couples with children and 6.5% single parents with children; 25% of residents are under 15. Households ↓
Growing fast
Trézilidé had 291 residents at the 2012 census and 405 in 2023, up 39%: faster growth than in 99% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Growth of +39% since 2012 puts Trézilidé ahead of 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 Finistère town +4%. The years 2012 to 2017 brought +31%; 2017 to 2023, +6%.
Trézilidé is younger than 83% of compared French towns: a median age of 39.2
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Trézilidé 39.2. The median compared French town: 44.
The figure for residents aged 15 to 24 is 8.7% in Trézilidé and 11% in the typical compared French town.
Women and men · all residents
49% women, 51% men
About 105 men for every 100 women. Median share of women: Finistère 51.7%, France 51.8%.
In Trézilidé, 26% of households are one person living alone, fewer than in 92% 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 Finistère median and the France median
Living alone · share
The average household has 2.5 people. On single-parent households, Trézilidé sits lower than 93% of compared French towns: 6.5%. The share of one-person households in the typical compared French town is 35%.
5.8% of households rent social housing (HLM), fewer than in 83% of compared French towns
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
Turnover: 7.1% of households moved in less than two years ago, and 15% have lived in their home 30 years or more. Set beside that, 12% of households rent social housing (HLM) in the typical compared French town. Second homes: 2.3%, near enough the figure in the typical compared French town.
€24,340 a year: the median standard of living
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 €24,340 a year: lower than in 68% of compared French towns.
Above 99% of compared French towns: 29% of households are headed by a manual worker
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
Compared with 32% in the typical compared French town, 29% of households are headed by a retired person here. Trézilidé has fewer households headed by a manager or professional than 72% of compared French towns, at 6.4%. In the typical compared French town, households headed by a manual worker come to 14%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Trézilidé ranks below 99% of compared French towns on immigrants: 1%
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.
1.2% of residents are foreign nationals; in the typical compared French town the figure is 4.3%. In the typical compared French town, the share of immigrants is 6.5%.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Trézilidé sits below 96% of compared French towns for single residents (19%)
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
41% of residents 15 and over are married, against 43% in the typical compared French town. For single residents, the comparison in the typical compared French town is 25%.
In Trézilidé, 13% of adults out of school have no qualification, fewer than in 86% 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
22% of adults out of school hold a higher-education qualification (typical compared French town: 30%). The share of adults with no qualification in the typical compared French town is 19%.
41 French towns of 405 to 2,582 people: this is the 2nd youngest
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
Villejust is the youngest (37.2); Prayssac the oldest (62.3).
No nearby town is as young as Trézilidé
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Trézilidé | 39.2 | 15% | 2.3% | 1% |
| Plouvorn 2,916 · 3.3 mi | 43.3 | 22% | 2.6% | 1.8% |
| Cléder 3,584 · 4.2 mi | 53.1 | 28% | 26% | 1.8% |
| Plouénan 2,610 · 5.1 mi | 44.3 | 23% | 6.8% | 2.4% |
| Plouescat 3,554 · 5.5 mi | 54.5 | 34% | 27% | 2% |
| Saint-Pol-de-Léon 6,941 · 6.8 mi | 52.2 | 32% | 14% | 4% |
| Landivisiau 9,426 · 7.1 mi | 42.5 | 21% | 2.8% | 4.4% |
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 Trézilidé
What is the population of Trézilidé?
405 at INSEE’s 2023 census, 39% more than in 2012 (291).
How old are Trézilidé’s residents?
The median age is 39.2, younger than 83% of compared French towns. 29% are under 18 and 15% 65 or older.
How many second homes are there in Trézilidé?
4, with occasional dwellings: 2.3% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Trézilidé?
INSEE counts 4 immigrants (born abroad, not French at birth), 1% of residents, and 5 foreign nationals (1.2%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Trézilidé?
€24,340 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.