Photo: Jpve · CC BY-SA 3.0Ollainville ranks above 98% of compared French towns on couples with children: 39%
In the typical compared French town, 32% of households are headed by a retired person; in Ollainville, 22%. Fewer households without a car than in 81% of compared French towns: 5.8%. This Essonne town counted 5,455 residents and 2,010 households at the 2023 Census. The census found that 4.2% of homes stand empty here.
Throughout this page, the Essonne 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 Ollainville
A town of families
39% of households are couples with children and 14% single parents with children; 23% of residents are under 15. Households ↓
A young town
Half of Ollainville’s residents are under 36.5 and half over; the median of compared French towns is 44. 23% are under 15 and 12% are 65 or older. Ages ↓
Growing fast
Ollainville had 4,613 residents at the 2012 census and 5,455 in 2023, up 18%: faster growth than in 88% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Faster growth than 88% of compared French towns: Ollainville changed by +18% 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 compared French town changed +5% over the same years, the median Essonne town +6%. The change was +2% from 2012 to 2017 and +16% from 2017 to 2023.
Ollainville is younger than 93% of compared French towns: a median age of 36.5
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Ollainville 36.5. The median compared French town: 44.
Compared with 22% in the typical compared French town, just over one in ten residents are 65 or over here. Ollainville has more residents aged 15 to 24 than 89% of compared French towns, at 13%.
Women and men · all residents
49% women, 51% men
About an even split. Median share of women: Essonne 51.3%, France 51.8%.
24% of households are one person living alone, fewer than in 95% 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 Essonne median and the France median
Living alone · share
14% of households are single parents (typical compared French town: 10%). The comparison figure for one-person households is 35% in the typical compared French town.
18% of households rent social housing (HLM), a share 71% of compared French towns don’t reach
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
9.3% of households moved in less than two years ago; 16% have been in their home 30 years or more. Against that, 12% of households rent social housing (HLM) in the typical compared French town. Lower than in 63% of compared French towns: 22% of homes are flats. At 1.2%, the share of second homes is in line with the figure in the typical compared French town.
The median resident lives on €29,720 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 €29,720 a year per consumption unit, higher than in 83% of compared French towns. The poverty rate is 11.0%.
Ollainville sits above 84% of compared French towns for households headed by a manager or professional (18%)
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
Across Ollainville, 13% of households are headed by a manual worker. In the typical compared French town, the share of households headed by a manager or professional is 9.4%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Ollainville: 11% of residents are immigrants, above 74% 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.
The median compared commune in Essonne has 13%; immigrants here make up a share higher than in nearly three quarters of compared French towns. Here, nearly one in ten residents are foreign nationals. In the typical compared French town, the share of immigrants is 6.5%.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
Ollainville: 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
In the typical compared French town, the share of married residents is 43%; Ollainville has 45%. On average, 25% of residents 15 and over are single in the typical compared French town.
Only 13% of adults out of school have no qualification in Ollainville
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
39% of adults out of school hold a higher-education qualification (typical compared French town: 30%). Adults with no qualification: 19% in the typical compared French town, for comparison.
41 French towns of 5,399 to 5,508 people: this is the 2nd 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 Crégy-lès-Meaux (35.3), the oldest Penmarch (60.8).
Nearby, 4 of 6 towns have older populations than Ollainville
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Ollainville | 36.5 | 12% | 1.2% | 11% |
| Arpajon 11,698 · 1.1 mi | 37.1 | 17% | 2.5% | 19% |
| Égly 7,166 · 1.1 mi | 35.7 | 14% | 1% | 20% |
| Saint-Germain-lès-Arpajon 11,623 · 1.6 mi | 35.2 | 12% | 1.5% | 17% |
| La Norville 4,268 · 1.7 mi | 44.4 | 21% | 1.5% | 9.4% |
| Bruyères-le-Châtel 3,788 · 1.7 mi | 40.6 | 17% | 1% | 8.1% |
| Leuville-sur-Orge 4,271 · 2.2 mi | 41.3 | 15% | 0.6% | 8.4% |
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 Ollainville
What is the population of Ollainville?
5,455 at INSEE’s 2023 census, 18% more than in 2012 (4,613).
How old are Ollainville’s residents?
The median age is 36.5, younger than 93% of compared French towns. 27% are under 18 and 12% 65 or older.
How many second homes are there in Ollainville?
26, with occasional dwellings: 1.2% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Ollainville?
INSEE counts 590 immigrants (born abroad, not French at birth), 11% of residents, and 450 foreign nationals (8.2%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Ollainville?
€29,720 a year per consumption unit in 2023 (median of compared French towns €25,970); 11.0% 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.