In Sailly-le-Sec, 0.7% of homes are flats, fewer than in 99% of compared French towns
Households headed by a manual worker make up 41%, against 14% in the typical compared French town. For Sailly-le-Sec, the census puts one-person households at 18%. Residents aged 15 to 24 are more common here than in 94% of compared French towns. At the 2023 Census Sailly-le-Sec was home to 351 people in 140 households.
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.
What stands out about the people of Sailly-le-Sec
A town of families
34% of households are couples with children and 15% single parents with children; 16% of residents are under 15. Households ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Sailly-le-Sec changed by +2% from 2012 to 2023, slower than 60% 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, +3% to 2017 and ±0% after, the town’s change compares with +5% for the median compared French town and −3% in Somme.
A lower share of residents aged 65 and over than 72% of compared French towns, at 19%
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Sailly-le-Sec 45.4. The median compared French town: 44.
With a median age of 45.4, Sailly-le-Sec is older than 59% of compared French towns. The usual figure: 22% of residents are 65 or over in the typical compared French town.
Women and men · all residents
49% women, 51% men
About 105 men for every 100 women. Median share of women: Somme 52.5%, France 51.8%.
A larger share of couples with children than 89% 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 Somme median and the France median
Living alone · share
The typical household size is 2.6 people. About one in seven: that is how common single-parent households are in Sailly-le-Sec (15%). Couples with children make up 25% in the typical compared French town.
Only 6.5% of households have no car in Sailly-le-Sec
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
5.3% of homes stand empty (typical compared French town: 6.7%). Households without a car: 11% in the typical compared French town, for comparison. The share of second homes stands at 4%.
Median standard of living: €26,450 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 €26,450 a year per consumption unit, higher than in 55% of compared French towns.
A smaller share of households headed by a retired person than 91% of compared French towns: 22%
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 manager or professional trails 64% of compared French towns: 7.4%. In the typical compared French town, the share of households headed by a retired person is 32%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
0.3% of residents are immigrants, below 99% 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.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Sailly-le-Sec sits above 93% of compared French towns for married residents (51%)
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
23% of residents 15 and over are single (typical compared French town: 25%). Married residents make up 43% in the typical compared French town.
Adults with no qualification: 23%, a higher share than 70% 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
Just over a quarter of Sailly-le-Sec’s residents 15 and over who have left education hold a higher-education diploma, against 30% in the median compared French town; 23% have no diploma (19%).
The 21st oldest of 41 French towns of 351 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.
The youngest is Villejust (37.2), the oldest Prayssac (62.3).
Older than Sailly-le-Sec: 3 of the 6 towns nearby
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Sailly-le-Sec | 45.4 | 19% | 4% | 0.3% |
| Corbie 5,982 · 3.5 mi | 47.2 | 26% | 1.1% | 1.9% |
| Villers-Bretonneux 4,647 · 4.6 mi | 41 | 18% | 0.6% | 1.7% |
| Albert 9,521 · 6.3 mi | 46 | 25% | 1.7% | 2.5% |
| Rosières-en-Santerre 2,894 · 9 mi | 46.9 | 27% | 0.9% | 2.3% |
| Boves 3,234 · 9.9 mi | 43.3 | 21% | 1.6% | 2.5% |
| Longueau 5,680 · 10.6 mi | 44.5 | 21% | 1.3% | 6.2% |
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 Sailly-le-Sec
What is the population of Sailly-le-Sec?
351 at INSEE’s 2023 census, 2% more than in 2012 (343).
How old are Sailly-le-Sec’s residents?
The median age is 45.4, older than 59% of compared French towns. 20% are under 18 and 19% 65 or older.
How many second homes are there in Sailly-le-Sec?
6, with occasional dwellings: 4% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Sailly-le-Sec?
INSEE counts 1 immigrants (born abroad, not French at birth), 0.3% 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 Sailly-le-Sec?
€26,450 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.