Half of Sequedin is under 40.2, younger than 78% of compared French towns
11% of households have no car in the typical compared French town, against 6.6% in Sequedin. Few places have as many households headed by a manager or professional: 15% here, more than in 76% of compared French towns. The 2023 Census put the town’s population at 4,675, in 1,720 households. Flats make up about one in five here (20%).
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.
Sequedin’s population changed by +8% since 2012, more than in 64% 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
In two steps, +9% to 2017 and −1% after, the town’s change compares with +5% for the median compared French town and ±0% in Nord.
Below 81% of compared French towns: 17% of residents are 65 or over
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Sequedin 40.2. The median compared French town: 44.
Here 13% of residents are 15 to 24, where the figure in the typical compared French town is 11%. The wider picture: 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
44% women, 56% men
About 80 women for every 100 men. Median share of women: Nord 51.9%, France 51.8%.
A larger share of couples with children than 75% of compared French towns: 30%
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
35% of households are one person living alone in the typical compared French town, against 32% in Sequedin. In the typical compared French town, the share of couples with children is 25%. Here, nearly one in ten households are single parents.
Second homes: 1%, a lower share than 81% 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
9.4% of households rent social housing (HLM), against 12% in the typical compared French town. As a yardstick, 2.1% of homes are second homes in the typical compared French town. Across Sequedin, 5.5% of homes stand empty.
The median resident lives on €27,970 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.
Living standards centre on €27,970 a year per consumption unit: higher than in 70% of compared French towns. The poverty rate is 7.0%.
Only 28% of households are headed by a retired person in Sequedin
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
On the census count, 14% of households are headed by a manual worker. In the typical compared French town, households headed by a retired person come to 32%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
7.1% of residents in Sequedin are immigrants
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.
Immigrants make up a share higher than in 54% of compared French towns; the median compared commune in Nord has 4.1%. Put another way, about one in 14: 7.1% of residents are immigrants. At 4.2%, the share of foreign nationals is in line with the figure 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.
Sequedin: 29% of residents 15 and over are single, above 72% 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
Roughly four in ten: 42% of residents 15 and over are married. The benchmark for single residents in the typical compared French town: 25%.
Graduates of higher education make up 27% in Sequedin, less than in 60% 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
21% of adults out of school have no qualification, against 19% in the typical compared French town. On average, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
41 French towns of 4,647 to 4,704 people: this is the 8th youngest
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
The youngest is Auzeville-Tolosane (30.5), the oldest La Tremblade (62.9).
2 in 6 nearby towns have a higher median age than Sequedin
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Sequedin | 40.2 | 17% | 1% | 7.1% |
| Haubourdin 15,074 · 1.1 mi | 39 | 18% | 0.5% | 4.6% |
| Hallennes-lez-Haubourdin 4,683 · 1.3 mi | 39.3 | 17% | 0.4% | 4% |
| Capinghem 2,728 · 1.7 mi | 38.3 | 19% | 0.7% | 6.1% |
| Loos 22,567 · 1.8 mi | 33 | 13% | 1.8% | 11% |
| Santes 5,652 · 2.4 mi | 43.7 | 21% | 0.5% | 2% |
| Emmerin 3,026 · 2.4 mi | 43.5 | 19% | 0.2% | 2.1% |
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 Sequedin
What is the population of Sequedin?
4,675 at INSEE’s 2023 census, 8% more than in 2012 (4,314).
How old are Sequedin’s residents?
The median age is 40.2, younger than 78% of compared French towns. 16% are under 18 and 17% 65 or older.
How many second homes are there in Sequedin?
18, with occasional dwellings: 1% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Sequedin?
INSEE counts 330 immigrants (born abroad, not French at birth), 7.1% of residents, and 200 foreign nationals (4.2%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Sequedin?
€27,970 a year per consumption unit in 2023 (median of compared French towns €25,970); 7.0% 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 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.