A lower share of flats than 99% of compared French towns, at 1.3%
The share of residents aged 15 to 24 is 7.8%, against 11% in the typical compared French town. In 2023, the Census found 432 residents in Plomion, living in 210 households. 0.5% of households rent social housing (HLM). The town has fewer single-parent households than 85% of compared French towns, at 7.5%.
Throughout this page, the Aisne 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 Plomion
One home in 10 is a second home
The census counted 29 second homes and occasional dwellings in Plomion, 10% of its 280 homes: higher than in 88% of compared French towns. 100% of them are houses. Their owners live elsewhere, so they aren’t in the population figures on this page. Homes & cars ↓
Fewer residents than in 2012
Plomion had 463 residents at the 2012 census and 432 in 2023, down 7%: slower growth than in 92% of compared French towns. Population ↓
Empty homes
The census found 38 homes empty (13%): for sale, to let, awaiting work or simply unused. Homes & cars ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Second homes make up 10% in Plomion, more than in 88% 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
6.4% of households arrived within the last two years, while 33% have stayed 30 years or more. In the typical compared French town, the share of second homes is 2.1%. Higher than in 92% of compared French towns: 13% of homes stand empty. Little separates the share of households without a car here, 11%, from the figure in the typical compared French town.
A change of −7% since 2012 leaves Plomion behind 92% 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 the whole period the median compared French town changed +5%, and the median Aisne town −4%. The years 2012 to 2017 brought ±0%; 2017 to 2023, −6%.
A median age of 47.9: Plomion is older than 74% 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
■ Plomion 47.9. The median compared French town: 44.
By its share of residents aged 65 and over (25%), Plomion is above 70% of compared French towns.
Women and men · all residents
51% women, 49% men
About an even split. Median share of women: Aisne 52.5%, France 51.8%.
In Plomion, 43% of households are one person living alone, more than in 78% 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 Aisne median and the France median
Living alone · share
There are 2 people in the average household. Across the comparison, 35% of households are one person living alone in the typical compared French town. Lower than in 63% of compared French towns: 22% of households are couples with children.
At the median, €22,220 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 midpoint of living standards here is €22,220 a year per consumption unit, lower than in 87% of compared French towns.
2.5% of households are headed by a manager or professional, below 99% 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
Set against 32% in the typical compared French town, 45% of households are headed by a retired person in Plomion. Census figures put households headed by a manual worker at 17% in the town. By way of comparison, 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).
A lower share of immigrants than 65% of compared French towns, at 4.9%
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.
In Plomion, 3.7% of residents are foreign nationals. Immigrants make up 6.5% 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.
Below 90% of compared French towns: 20% of residents 15 and over are single
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%; Plomion has 42%. By way of comparison, 25% of residents 15 and over are single in the typical compared French town.
Fewer graduates of higher education than 99% of compared French towns: 13%
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
Adults with no qualification make up 29%, against 19% in the typical compared French town. The usual figure: 30% of adults out of school hold a higher-education qualification in the typical compared French town.
15th highest median age among 41 French towns of 432 to 2,582
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).
Every neighbor is younger than Plomion
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 Plomion
What is the population of Plomion?
432 at INSEE’s 2023 census, 7% fewer than in 2012 (463).
How old are Plomion’s residents?
The median age is 47.9, older than 74% of compared French towns. 20% are under 18 and 25% 65 or older.
How many second homes are there in Plomion?
29, with occasional dwellings: 10% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Plomion?
INSEE counts 21 immigrants (born abroad, not French at birth), 4.9% of residents, and 16 foreign nationals (3.7%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Plomion?
€22,220 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.