Thiernu ranks below 99% of compared French towns on households headed by a retired person: 10%
On the census count, a fifth of households are single parents. Lower than in 96% of compared French towns: 7.4% of residents are 15 to 24. The 2023 Census counted 122 residents in 50 households. 6.3% of homes are second homes, against 2.1% in the typical compared French town.
Throughout this page, the Aisne 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 Thiernu
Growing fast
Thiernu had 99 residents at the 2012 census and 122 in 2023, up 23%: faster growth than in 93% of compared French towns. Population ↓
Empty homes
The census found 9 homes empty (14%): 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 +23% change since 2012: Thiernu grew faster than 93% 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 Aisne town −4%. From 2012 to 2017 the change was +3%; from 2017 to 2023, +20%.
Younger than 77% of compared French towns: half of Thiernu is under 40.3
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Thiernu 40.3. The median compared French town: 44.
The share of residents aged 65 and over trails just over three fifths of compared French towns: 20%.
Women and men · all residents
51% women, 49% men
About an even split. Median share of women: Aisne 52.5%, France 51.8%.
Thiernu: 30% of households are couples with children, above 75% 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 Aisne median and the France median
Living alone · share
Against a figure of 35% in the typical compared French town, the share of one-person households in Thiernu comes in at 30%. For comparison, a quarter of households are couples with children in the typical compared French town. On average, 2.4 people share a household.
A higher share of empty homes than 94% of compared French towns, at 14%
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
In the typical compared French town, the share of flats is 30%; Thiernu has 9.5%. On top of that, households in social housing are rarer here than in 99% of compared French towns. Against that, 6.7% of homes stand empty in the typical compared French town. For Thiernu, the census puts households without a car at 18%.
A typical living standard of €17,360 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 €17,360 a year: lower than in 99% of compared French towns.
A higher share of households headed by a manual worker than 99% of compared French towns, at 40%
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 more common here than in 53% of compared French towns. As a reference point, 14% of households are headed by a manual worker in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Thiernu sits below 87% of compared French towns for immigrants (2.5%)
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 median compared commune in Aisne has 5.7%; immigrants here make up a share lower than in 87% of compared French towns. Against that, 6.5% of residents are immigrants in the typical compared French town. The census found that 4.1% of residents are foreign nationals in Thiernu.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
28% of residents 15 and over are married, below 99% of compared French towns
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
In the typical compared French town, the share of single residents is 25%; Thiernu has 34%. The comparison figure for married residents is 43% in the typical compared French town.
Thiernu ranks below 99% of compared French towns on graduates of higher education: 11%
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
In the typical compared French town, nearly a fifth of adults out of school have no qualification; in Thiernu, 37%. Graduates of higher education: 30% in the typical compared French town, for comparison.
The 4th youngest of 41 French towns of 122 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.
At the ends of the range sit Villejust (37.2), the youngest, and Prayssac (62.3), the oldest.
Every neighbor is older than Thiernu
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Thiernu | 40.3 | 20% | 6.3% | 2.5% |
| Vervins 2,549 · 7.3 mi | 42.2 | 23% | 2.2% | 4.2% |
| Guise 4,490 · 12.1 mi | 47.9 | 27% | 1% | 1.8% |
| Athies-sous-Laon 2,578 · 14 mi | 44.9 | 23% | 0.7% | 2% |
| Laon 24,220 · 15.4 mi | 40.8 | 21% | 1.8% | 9.4% |
| Hirson 8,469 · 17.2 mi | 43.6 | 24% | 0.9% | 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 Thiernu
What is the population of Thiernu?
122 at INSEE’s 2023 census, 23% more than in 2012 (99).
How old are Thiernu’s residents?
The median age is 40.3, younger than 77% of compared French towns. 29% are under 18 and 20% 65 or older.
How many second homes are there in Thiernu?
4, with occasional dwellings: 6.3% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Thiernu?
INSEE counts 3 immigrants (born abroad, not French at birth), 2.5% of residents, and 5 foreign nationals (4.1%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Thiernu?
€17,360 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.