Onnaing ranks above 87% of compared French towns on households in social housing: 26%
The share of flats is 10%, against 30% in the typical compared French town. 0.4% of its homes are second homes; 5.1% of residents are immigrants. Residents aged 65 and over are rarer here than in 76% of compared French towns. Onnaing’s 3,610 households held 8,479 residents 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.
A change of −3% since 2012 leaves Onnaing behind 80% 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
Between 2012 and 2017 the population moved +1%, then −4% to 2023. Over those years, the median Nord town changed ±0% and the median compared French town +5%.
Younger than 80% of compared French towns: half of Onnaing is under 39.8
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Onnaing 39.8. The median compared French town: 44.
12% of residents are 15 to 24; in the typical compared French town the figure is 11%.
Women and men · all residents
52% women, 48% men
About 92 men for every 100 women. Median share of women: Nord 51.9%, France 51.8%.
Onnaing sits above 77% of compared French towns for couples with children (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
With single-parent households at 11%, Onnaing is ahead of 67% of compared French towns on that count. Against that, a quarter of households are couples with children in the typical compared French town. Each household has 2.3 people on average. On one-person households, Onnaing sits lower than 55% of compared French towns: 34%.
A higher share of households without a car than 80% of compared French towns, at 19%
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
Without a car: one household in five, against 11% in the median compared French town. At 7.8%, the share of empty homes is higher than in 62% of compared French towns. Nearly one in ten households moved in less than two years ago; 24% have been in their home 30 years or more.
€21,220 a year: the median standard of living
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 residents live in households above €21,220 a year per consumption unit and half below; the level is lower than in 93% of compared French towns. Residents below the poverty line make up 25.0%.
21% of households are headed by a manual worker, more than in 85% 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 figure for households headed by a manager or professional is 6.9% in Onnaing and 9.4% in the typical compared French town. By way of comparison, 14% of households are headed by a manual worker in the typical compared French town. Census figures put households headed by a retired person at 29% here.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Only 5.1% of residents are immigrants in Onnaing
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 lower than in 62% of compared French towns; the median compared commune in Nord has 4.1%. In the typical compared French town, 6.5% of residents are immigrants. Census figures put foreign nationals at 3.8% in Onnaing.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Single residents make up 29% in Onnaing, more than in 75% 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
39% of residents 15 and over are married, against 43% in the typical compared French town. For single residents, the comparison in the typical compared French town is 25%.
A smaller share of graduates of higher education than 86% of compared French towns: 20%
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 tops 78% of compared French towns: 25%. Typically, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
The 5th youngest of 41 French towns of 8,396 to 8,573 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 Varces-Allières-et-Risset (35.8), the oldest La Grande-Motte (62.3).
Onnaing and its 6 nearest towns: 4 of them are older
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Onnaing | 39.8 | 18% | 0.4% | 5.1% |
| Quarouble 3,145 · 1.1 mi | 43.7 | 20% | 0.6% | 3.7% |
| Saint-Saulve 10,947 · 2.1 mi | 44 | 23% | 0.7% | 6.3% |
| Bruay-sur-l'Escaut 11,644 · 2.5 mi | 37.4 | 16% | 0.4% | 5.9% |
| Escautpont 4,202 · 2.7 mi | 40.1 | 18% | 0.5% | 4.8% |
| Quiévrechain 5,949 · 3.1 mi | 37.6 | 18% | 0.8% | 13% |
| Fresnes-sur-Escaut 7,354 · 3.3 mi | 40.6 | 19% | 0.6% | 5.7% |
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 Onnaing
What is the population of Onnaing?
8,479 at INSEE’s 2023 census, 3% fewer than in 2012 (8,715).
How old are Onnaing’s residents?
The median age is 39.8, younger than 80% of compared French towns. 25% are under 18 and 18% 65 or older.
How many second homes are there in Onnaing?
15, with occasional dwellings: 0.4% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Onnaing?
INSEE counts 440 immigrants (born abroad, not French at birth), 5.1% of residents, and 320 foreign nationals (3.8%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Onnaing?
€21,220 a year per consumption unit in 2023 (median of compared French towns €25,970); 25.0% 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.