1.1% of households have no car, below 99% of compared French towns
21% of households are headed by a manager or professional, against 9.4% in the typical compared French town. There were 94 households in Mortemer at the 2023 Census, home to 220 residents. Here, 16% of residents are 65 or over. Few places have so few single-parent households: 5.3% here, fewer than in 98% of compared French towns.
Throughout this page, the Oise 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.
+7% since 2012, a pace 60% 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
From 2012 to 2017 the population moved +9%, and from 2017 to 2023 −2%; the median compared French town changed +5% and the median Oise town +2%.
Half of Mortemer is over 44.8, older than 55% 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
■ Mortemer 44.8. The median compared French town: 44.
Residents aged 15 to 24 make up 11%, close to the figure in the typical compared French town.
Women and men · all residents
47% women, 53% men
About 111 men for every 100 women. Median share of women: Oise 51.7%, France 51.8%.
Below 68% of compared French towns: 32% of households are one person living alone
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 Oise median and the France median
Living alone · share
Average household size: 2.3 people. The usual figure: just over a third of households are one person living alone in the typical compared French town. Higher than in 56% of compared French towns: 26% of households are couples with children.
Mortemer: 7% of homes are second homes, above 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
By its share of empty homes (5%), Mortemer is below three quarters of compared French towns. Flats are rarer here than in 99% of compared French towns. In the typical compared French town, 2.1% of homes are second homes.
Median standard of living: €27,220 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 €27,220 a year per consumption unit, higher than in 63% of compared French towns.
Households headed by a manual worker: 16%, a higher share than 62% 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
Roughly three in ten: nearly a third of households are headed by a retired person. Households headed by a manual worker: 14% in the typical compared French town, for comparison.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
A lower share of immigrants than 89% of compared French towns, at 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.
Foreign nationals are rarer here than in 99% of compared French towns. 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.
Fewer married residents than 70% of compared French towns: 40%
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
On the census count, 25% of residents 15 and over are single. In the typical compared French town, married residents come to 43%.
A lower share of graduates of higher education than 66% of compared French towns, at 26%
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
Adults with no qualification make up 17%, against 19% in the typical compared French town. In the typical compared French town, 30% of adults out of school hold a higher-education qualification.
Ranked by age, 18th youngest of 41 French towns this size
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.
Mortemer sits below 2 of its 6 closest neighbors on median age
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Mortemer | 44.8 | 16% | 7% | 2.3% |
| Montdidier 5,935 · 7 mi | 46.3 | 25% | 1.8% | 2.3% |
| Estrées-Saint-Denis 3,664 · 10 mi | 44.4 | 22% | 1.2% | 4.1% |
| Roye 5,833 · 10.3 mi | 42.8 | 22% | 2.1% | 3.7% |
| Thourotte 4,463 · 11 mi | 47.2 | 27% | 0.8% | 6.8% |
| Longueil-Annel 2,586 · 11 mi | 42 | 20% | 1% | 6.6% |
| Ribécourt-Dreslincourt 3,871 · 11.7 mi | 40.5 | 18% | 1.2% | 7.3% |
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 Mortemer
What is the population of Mortemer?
220 at INSEE’s 2023 census, 7% more than in 2012 (205).
How old are Mortemer’s residents?
The median age is 44.8, older than 55% of compared French towns. 22% are under 18 and 16% 65 or older.
How many second homes are there in Mortemer?
7, with occasional dwellings: 7% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Mortemer?
INSEE counts 5 immigrants (born abroad, not French at birth), 2.3% 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 Mortemer?
€27,220 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 October 30, 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.