One-person households: 23%, a lower share than 97% of compared French towns
Flats are rarer here than in 99% of compared French towns. There were 65 households in Olizy at the 2023 Census, home to 148 residents. 4.3% of households have no car. Here 38% of households are headed by a manual worker, where the figure in the typical compared French town is 14%.
Throughout this page, the Marne 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 Olizy
Fewer residents than in 2012
Olizy had 158 residents at the 2012 census and 148 in 2023, down 6%: slower growth than in 92% of compared French towns. Population ↓
Empty homes
The census found 11 homes empty (14%): for sale, to let, awaiting work or simply unused. Homes & cars ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
A −6% change since 2012: slower than 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
Against +5% for the median compared French town and −2% for the median Marne town, the change came in two steps: +1% from 2012 to 2017, then −8% to 2023.
Fewer residents aged 65 and over than 75% of compared French towns: 18%
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Olizy 44. The median compared French town: 44.
In Olizy, 12% of residents are 15 to 24, beside 11% in the typical compared French town. For comparison, 22% of residents are 65 or over in the typical compared French town. Half of the town’s residents are under 44, younger than in half of compared French towns.
Women and men · all residents
51% women, 49% men
About an even split. Median share of women: Marne 52.7%, France 51.8%.
In Olizy, 31% of households are couples with children, more than in 79% 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 Marne median and the France median
Living alone · share
Single-parent households are rarer here than in 99% of compared French towns. To put it in context, a quarter of households are couples with children in the typical compared French town. The typical household size is 2.3 people.
Above 94% of compared French towns: 14% of homes stand empty
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
Just over a third of households have been in place 30 years or more; 12% moved in within the last two years. Households in social housing are rarer here than in 99% of compared French towns. Across the comparison, 6.7% of homes stand empty in the typical compared French town.
Per consumption unit, the median standard of living is €31,400 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 median standard of living in Olizy is €31,400 a year per consumption unit: higher than in 89% of compared French towns.
Households headed by a retired person: 31%, a lower share than 60% 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
Households headed by a manager or professional are rarer here than in 99% of compared French towns. In the typical compared French town, nearly a third of households are headed by a retired person.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Immigrants make up 1.3% in Olizy, less than in 98% 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.
In the typical compared French town, the share of foreign nationals is 4.3%; Olizy has 0.6%. Typically, 6.5% of residents are immigrants 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 79% of compared French towns: 22% 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
Across Olizy, 43% of residents 15 and over are married. In the typical compared French town, single residents come to 25%.
Graduates of higher education make up 22% in Olizy, less than in 80% 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
The share of adults with no qualification tops 60% of compared French towns: 21%. For graduates of higher education, the comparison in the typical compared French town is 30%.
The 16th youngest of 41 French towns of 148 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.
Villejust is the youngest (37.2); Prayssac the oldest (62.3).
4 of 6 neighbors are older than Olizy
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 Olizy
What is the population of Olizy?
148 at INSEE’s 2023 census, 6% fewer than in 2012 (158).
How old are Olizy’s residents?
The median age is 44, younger than 50% of compared French towns. 20% are under 18 and 18% 65 or older.
How many second homes are there in Olizy?
0, with occasional dwellings: 0% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Olizy?
INSEE counts 2 immigrants (born abroad, not French at birth), 1.3% of residents, and 1 foreign nationals (0.6%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Olizy?
€31,400 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 8, 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.