Households headed by a manager or professional make up 34% in Forest-sur-Marque, more than in 98% of compared French towns
In the typical compared French town, just over one in ten residents are 15 to 24; in Forest-sur-Marque, 7.5%. Here, one in ten homes are flats. One-person households are rarer here than in 97% of compared French towns. 1,662 residents in 660 households: that is Forest-sur-Marque at the 2023 Census.
Throughout this page, the Nord 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 Forest-sur-Marque
A town of families
34% of households are couples with children and 9.8% single parents with children; 20% of residents are under 15. Households ↓
Many graduates
52% of residents 15 and over who have left education hold a diploma above the bac, 23% a master’s or more (bac+5). Qualifications ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Faster growth than 79% of compared French towns: Forest-sur-Marque changed by +14% since 2012
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
The median Nord town changed ±0% and the median compared French town +5%; here the first five years brought ±0% and the next six +14%.
Half of Forest-sur-Marque is under 41.6, younger than 69% 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
■ Forest-sur-Marque 41.6. The median compared French town: 44.
Residents aged 65 and over make up about one in five here (22%).
Women and men · all residents
52% women, 48% men
About 93 men for every 100 women. Median share of women: Nord 51.9%, France 51.8%.
A larger share of couples with children than 90% 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 Nord median and the France median
Living alone · share
A household here holds 2.4 people on average. The wider picture: a quarter of households are couples with children in the typical compared French town. There is little gap on single-parent households: 9.8%, about the same as in the typical compared French town.
Forest-sur-Marque ranks below 91% of compared French towns on empty homes: 3.6%
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
5.2% of households have no car; in the typical compared French town the figure is 11%. Second homes account for 0.7%. Compared with other places, households in social housing are scarce here: 9.2%, fewer than in 64% of compared French towns. As a yardstick, 6.7% of homes stand empty in the typical compared French town.
A median of €31,300 a year per consumption unit
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 €31,300 a year per consumption unit, higher than in 89% of compared French towns.
Households headed by a manual worker: 6.8%, a lower share than 91% 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
The share of households headed by a retired person is 30%, against 32% in the typical compared French town. For households headed by a manual worker, the comparison in the typical compared French town is 14%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
3.4% of residents are immigrants, below 78% 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.
In the typical compared French town, the share of foreign nationals is 4.3%; Forest-sur-Marque has 2.3%. Across the comparison, 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: 47%, a higher share than 77% 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%; Forest-sur-Marque has 22%. Measured more widely, 43% of residents 15 and over are married in the typical compared French town.
A higher share of graduates of higher education than 94% of compared French towns, at 52%
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: 15% here and 19% in the typical compared French town. Graduates of higher education make up 30% in the typical compared French town.
7th lowest median age among 41 French towns of 1,662 to 2,582
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).
Of the 6 towns nearest Forest-sur-Marque, 3 are older
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
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 Forest-sur-Marque
What is the population of Forest-sur-Marque?
1,662 at INSEE’s 2023 census, 14% more than in 2012 (1,459).
How old are Forest-sur-Marque’s residents?
The median age is 41.6, younger than 69% of compared French towns. 23% are under 18 and 22% 65 or older.
How many second homes are there in Forest-sur-Marque?
5, with occasional dwellings: 0.7% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Forest-sur-Marque?
INSEE counts 57 immigrants (born abroad, not French at birth), 3.4% of residents, and 38 foreign nationals (2.3%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Forest-sur-Marque?
€31,300 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.