Below 99% of compared French towns: 0.9% of homes are flats
One-person households: 21% here and 35% in the typical compared French town. Démuin has fewer residents aged 65 and over than 86% of compared French towns, at 16%. At the 2023 Census, 524 people lived locally, in 210 households. Households headed by a retired person make up about one in six here (17%).
Throughout this page, the Somme 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 Démuin
A town of families
34% of households are couples with children and 7.6% single parents with children; 20% of residents are under 15. Households ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
+9% since 2012, a pace 67% of compared French towns didn’t match
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
Here the change came as +3% to 2017, then +6% to 2023.
A median age of 41.4: Démuin is younger than 70% 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
■ Démuin 41.4. The median compared French town: 44.
The figure for residents aged 15 to 24 is 9.8% in Démuin and 11% in the typical compared French town.
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Somme 52.5%, France 51.8%.
More couples with children than 91% of compared French towns: 34%
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 Somme median and the France median
Living alone · share
A household here holds 2.5 people on average. 7.6% of households are single parents, fewer than in 85% of compared French towns. Elsewhere, a quarter of households are couples with children in the typical compared French town.
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
Households in social housing are rarer here than in 99% of compared French towns. For comparison, 11% of households have no car in the typical compared French town. On the census count, 3.8% of homes stand empty. At 2.7%, second homes sit close to the figure in the typical compared French town.
Per consumption unit, the median standard of living is €27,000 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 €27,000 a year per consumption unit, higher than in 61% of compared French towns.
20% of households are headed by a manual worker, more than in 83% 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 make up 12%, against 9.4% in the typical compared French town. To put it in context, 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).
Immigrants: 1.4%, a lower share than 97% 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.
Foreign nationals are rarer here than in 99% of compared French towns. On average, 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.
Married residents make up 49% in Démuin, more than in 89% 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
25% of residents 15 and over are single in the typical compared French town, against 21% in Démuin. Married residents: 43% in the typical compared French town, for comparison.
Adults with no qualification make up 13% in Démuin, less than in 84% 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
Set against 30% in the typical compared French town, nearly a third of adults out of school hold a higher-education qualification in Démuin. For adults with no qualification, the comparison in the typical compared French town is 19%.
The 7th youngest of 41 French towns of 524 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.
5 of 6 neighbors are older than Démuin
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Démuin | 41.4 | 16% | 2.7% | 1.4% |
| Villers-Bretonneux 4,647 · 3.5 mi | 41 | 18% | 0.6% | 1.7% |
| Moreuil 3,936 · 4 mi | 43.9 | 23% | 3% | 1.1% |
| Corbie 5,982 · 6.5 mi | 47.2 | 26% | 1.1% | 1.9% |
| Boves 3,234 · 7 mi | 43.3 | 21% | 1.6% | 2.5% |
| Rosières-en-Santerre 2,894 · 7.3 mi | 46.9 | 27% | 0.9% | 2.3% |
| Longueau 5,680 · 8.8 mi | 44.5 | 21% | 1.3% | 6.2% |
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 Démuin
What is the population of Démuin?
524 at INSEE’s 2023 census, 9% more than in 2012 (480).
How old are Démuin’s residents?
The median age is 41.4, younger than 70% of compared French towns. 24% are under 18 and 16% 65 or older.
How many second homes are there in Démuin?
6, with occasional dwellings: 2.7% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Démuin?
INSEE counts 7 immigrants (born abroad, not French at birth), 1.4% of residents, and 0 foreign nationals (0%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Démuin?
€27,000 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.