3% of households are headed by a manager or professional, below 97% of compared French towns
The share of households without a car tops 89% of compared French towns: 23%. Montdidier’s 2,810 households held 5,935 residents at the 2023 Census. About one in nine: that is how common empty homes are in Montdidier (11%). Households in social housing are more common here than in 84% of compared French towns.
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.
Montdidier’s population moved −4% on 2012, less than in 84% 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
From 2012 to 2017 the population moved +1%, and from 2017 to 2023 −5%; the median compared French town changed +5% and the median Somme town −3%.
Montdidier is older than 65% of compared French towns: a median age of 46.3
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Montdidier 46.3. The median compared French town: 44.
Here a quarter of residents are 65 or over, where the figure in the typical compared French town is 22%. The census found that just over one in ten residents are 15 to 24 in Montdidier.
Women and men · all residents
53% women, 47% men
About 87 men for every 100 women. Median share of women: Somme 52.5%, France 51.8%.
16% of households are single parents, more than in 97% 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 Somme median and the France median
Living alone · share
Compared with 35% in the typical compared French town, just over two in five households are one person living alone here. In the typical compared French town, the share of single-parent households is 10%. Roughly two in ten: 18% of households are couples with children.
A lower share of flats than 53% of compared French towns, at 28%
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
Here, 1.8% of homes are second homes. As a yardstick, 30% of homes are flats in the typical compared French town.
The middle resident’s standard of living: €21,880 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.
At €21,880 a year per consumption unit, the median standard of living here is lower than in 89% of compared French towns. Residents below the poverty line make up 23.0%.
A larger share of households headed by a manual worker than 92% of compared French towns: 23%
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
Set against 32% in the typical compared French town, 35% of households are headed by a retired person in Montdidier. Measured more widely, 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).
A smaller share of immigrants than 88% of compared French towns: 2.3%
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 Somme has 2.5%; immigrants here make up a share lower than in 88% of compared French towns. The share of foreign nationals stands at 1.2%. For immigrants, the comparison in the typical compared French town is 6.5%.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Montdidier sits below 88% of compared French towns for married residents (36%)
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
With single residents at 28%, Montdidier is ahead of 71% of compared French towns on that count. As a yardstick, 43% of residents 15 and over are married in the typical compared French town.
15% of adults out of school hold a higher-education qualification, fewer than in 97% 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
With adults with no qualification at 37%, Montdidier is ahead of 99% of compared French towns on that count. Against that, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
41 French towns of 5,872 to 6,000 people: this is the 16th 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.
At the ends of the range sit La Verrière (35.4), the youngest, and Ciboure (56.7), the oldest.
1 of 6 neighbors are older than Montdidier
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Montdidier | 46.3 | 25% | 1.8% | 2.3% |
| Moreuil 3,936 · 9.7 mi | 43.9 | 23% | 3% | 1.1% |
| Roye 5,833 · 10.1 mi | 42.8 | 22% | 2.1% | 3.7% |
| Saint-Just-en-Chaussée 5,810 · 11.8 mi | 41.2 | 20% | 0.7% | 6.6% |
| Ailly-sur-Noye 2,648 · 11.8 mi | 45.3 | 25% | 1.2% | 1.2% |
| Breteuil 4,222 · 12.6 mi | 42.7 | 23% | 1.3% | 2.8% |
| Rosières-en-Santerre 2,894 · 12.9 mi | 46.9 | 27% | 0.9% | 2.3% |
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 Montdidier
What is the population of Montdidier?
5,935 at INSEE’s 2023 census, 4% fewer than in 2012 (6,174).
How old are Montdidier’s residents?
The median age is 46.3, older than 65% of compared French towns. 20% are under 18 and 25% 65 or older.
How many second homes are there in Montdidier?
58, with occasional dwellings: 1.8% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Montdidier?
INSEE counts 140 immigrants (born abroad, not French at birth), 2.3% of residents, and 71 foreign nationals (1.2%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Montdidier?
€21,880 a year per consumption unit in 2023 (median of compared French towns €25,970); 23.0% of residents live below the poverty line. 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.