A lower share of households in social housing than 94% of compared French towns, at 3%
31% of households are couples with children; in the typical compared French town the figure is 25%. At the 2023 Census, 1,786 people lived in Plailly, in 740 households. Residents aged 15 to 24: 8.2% of the total. This Oise town has fewer households without a car than 81% of compared French towns, at 5.8%.
Throughout this page, the Oise 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.
Growth of +7% since 2012 puts Plailly ahead of 61% 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
From 2012 to 2017 the change was +8%; from 2017 to 2023, ±0%. Over the same years the median compared French town changed +5%, the median Oise town +2%.
A median age of 48: Plailly is older than 75% 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
■ Plailly 48. The median compared French town: 44.
In Plailly, 25% of residents are 65 or over, beside 22% in the typical compared French town.
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Oise 51.7%, France 51.8%.
Fewer single-parent households than 92% of compared French towns: 6.7%
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 Oise median and the France median
Living alone · share
A household here holds 2.3 people on average. 30% of households are one person living alone, a lower share than in 76% of compared French towns. As a reference point, 10% of households are single parents in the typical compared French town.
Flats make up 22% in Plailly, less 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
Long tenure is the mark of 24% of households (30 years or more), short tenure of 11% (under two years). At 2.5%, the share of second homes is higher than in 57% of compared French towns. On empty homes, 7.5% here is much the same as in the typical compared French town.
At the median, €34,050 a year to live on
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 median standard of living in Plailly is €34,050 a year per consumption unit: higher than in 95% of compared French towns.
Plailly: 13% of households are headed by a manager or professional, above 68% 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
16% of households are headed by a manual worker, against 14% in the typical compared French town. By contrast, fewer households headed by a retired person than in 57% of compared French towns: 31%. Against that, 9.4% of households are headed by a manager or professional in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Plailly: 5.6% 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.
Immigrants make up a share lower than in 58% of compared French towns; the median compared commune in Oise has 7.4%. About one in 18: that is how common immigrants are in Plailly (5.6%). Foreign nationals: 3.5%, near enough 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.
21% of residents 15 and over are single, below 88% 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
43% of residents 15 and over are married in the typical compared French town, against 47% in Plailly. In the typical compared French town, single residents come to 25%.
Plailly sits above 77% of compared French towns for graduates of higher education (39%)
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
14% of adults out of school have no qualification, against 19% in the typical compared French town. Set beside that, 30% of adults out of school hold a higher-education qualification in the typical compared French town.
Among 41 French towns of 1,786 to 2,582 people, the 15th oldest
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
At the ends of the range sit Villejust (37.2), the youngest, and Prayssac (62.3), the oldest.
Every neighbor is younger than Plailly
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Plailly | 48 | 25% | 2.5% | 5.6% |
| Saint-Witz 2,724 · 1.1 mi | 40.9 | 16% | 0.9% | 14% |
| Survilliers 4,091 · 1.9 mi | 35.6 | 13% | 1.2% | 14% |
| Vémars 3,124 · 2.5 mi | 35.8 | 12% | 1.9% | 13% |
| La Chapelle-en-Serval 3,084 · 2.8 mi | 38.2 | 12% | 1.9% | 8.6% |
| Moussy-le-Neuf 3,253 · 2.8 mi | 39.6 | 13% | 2.4% | 7.7% |
| Fosses 10,570 · 3.3 mi | 36.1 | 13% | 0.8% | 21% |
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 Plailly
What is the population of Plailly?
1,786 at INSEE’s 2023 census, 7% more than in 2012 (1,662).
How old are Plailly’s residents?
The median age is 48, older than 75% of compared French towns. 20% are under 18 and 25% 65 or older.
How many second homes are there in Plailly?
21, with occasional dwellings: 2.5% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Plailly?
INSEE counts 100 immigrants (born abroad, not French at birth), 5.6% of residents, and 62 foreign nationals (3.5%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Plailly?
€34,050 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 October 30, 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.