Couples with children: 37%, a higher share than 96% of compared French towns
Where 32% of households are headed by a retired person in the typical compared French town, Senlecques has 11%. Households in social housing are rarer here than in 99% of compared French towns. In 2023, the Census found 251 residents here, living in 94 households. Here, 3% of homes stand empty.
Throughout this page, the Pas-de-Calais 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 Senlecques
A town of families
37% of households are couples with children and 16% single parents with children; 22% of residents are under 15. Households ↓
A young town
Half of Senlecques’ residents are under 38.6 and half over; the median of compared French towns is 44. 22% are under 15 and 18% are 65 or older. Ages ↓
Fewer residents than in 2012
Senlecques had 264 residents at the 2012 census and 251 in 2023, down 5%: slower growth than in 88% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Since 2012, Senlecques has changed by −5%, slower than 88% 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
Over those years, the median Pas-de-Calais town changed −1% and the median compared French town +5%. Between 2012 and 2017 the population moved +2%, then −7% to 2023.
Half of Senlecques is under 38.6, younger than 86% 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
■ Senlecques 38.6. The median compared French town: 44.
Compared with 22% in the typical compared French town, 18% of residents are 65 or over here. 13% of residents are 15 to 24, more than in 86% of compared French towns.
Women and men · all residents
49% women, 51% men
About 106 men for every 100 women. Median share of women: Pas-de-Calais 52.0%, France 51.8%.
In Senlecques, 21% of households are one person living alone, fewer than in 99% 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 Pas-de-Calais median and the France median
Living alone · share
Compared with 10% in the typical compared French town, 16% of households are single parents here. As a reference point, 35% of households are one person living alone in the typical compared French town. On average, 2.7 people share a household.
8.3% of households have no car, fewer than in 64% 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
Recent arrivals (under two years) make up 2.1% of households; long-stayers (30 years or more) 24%. Flats are rarer here than in 99% of compared French towns. The share of households without a car in the typical compared French town is 11%. At 3%, second homes sit close to the figure in the typical compared French town.
The median resident lives on €25,830 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.
Half of Senlecques’ residents live in households with a standard of living below €25,830 a year per consumption unit, and half above: lower than in 51% of compared French towns.
A larger share of households headed by a manual worker than 99% of compared French towns: 47%
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
With households headed by a manager or professional at 5.3%, Senlecques is behind 83% of compared French towns on that count. 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).
Senlecques: 0% of residents 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.
The median compared commune in Pas-de-Calais has 1.7%; immigrants here make up a share lower than in 99% of compared French towns.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Senlecques: 50% of residents 15 and over are married, above 91% 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
Census figures put single residents at 25% in Senlecques. In the typical compared French town, the share of married residents is 43%.
Graduates of higher education make up 23% in Senlecques, less than in 77% 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
The share of adults with no qualification is 14%, against 19% in the typical compared French town. The benchmark for graduates of higher education in the typical compared French town: 30%.
The 2nd youngest of 41 French towns of 251 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.
Villejust is the youngest (37.2); Prayssac the oldest (62.3).
Around Senlecques, 5 of 6 towns have a higher median age
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 Senlecques
What is the population of Senlecques?
251 at INSEE’s 2023 census, 5% fewer than in 2012 (264).
How old are Senlecques’ residents?
The median age is 38.6, younger than 86% of compared French towns. 28% are under 18 and 18% 65 or older.
How many second homes are there in Senlecques?
3, with occasional dwellings: 3% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Senlecques?
INSEE counts 0 immigrants (born abroad, not French at birth), 0% 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 Senlecques?
€25,830 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.