24% of households are one person living alone, below 96% of compared French towns
In the typical compared French town, the share of households headed by a manual worker is 14%; Cachy has 38%. There were 130 households here at the 2023 Census, home to 300 residents. The share of residents aged 65 and over stands at 17%. Flats are rarer here than in 99% of compared French towns.
Throughout this page, the Somme 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 +10% change since 2012: faster than 69% 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 +3%; from 2017 to 2023, +6%.
Younger than 64% of compared French towns: half of Cachy is under 42.2
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Cachy 42.2. The median compared French town: 44.
The share of residents aged 15 to 24 trails 76% of compared French towns: 9.3%.
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Somme 52.5%, France 51.8%.
Cachy sits above 75% of compared French towns for single-parent households (12%)
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 Somme median and the France median
Living alone · share
Each household has 2.3 people on average. Higher than in 51% of compared French towns: 25% of households are couples with children. Elsewhere, one in ten households are single parents in the typical compared French town.
Cachy ranks below 69% of compared French towns on households without a car: 7.6%
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
Households in social housing are rarer here than in 99% of compared French towns. For comparison, 11% of households have no car in the typical compared French town. A quarter of households have been in place 30 years or more; 12% moved in within the last two years. At 6.4%, empty homes sit close to the figure in the typical compared French town.
€29,320 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 €29,320 a year per consumption unit and half below; the level is higher than in 81% of compared French towns.
A lower share of households headed by a retired person than 91% of compared French towns, at 23%
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 share of households headed by a manager or professional is 11%, against 9.4% in the typical compared French town. Set beside that, nearly a third of households are headed by a retired person in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Only 0.7% of residents are immigrants in Cachy
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 share of foreign nationals is 0.4%, against 4.3% in the typical compared French town. In the typical compared French town, immigrants come to 6.5%. That is lower than in 99% of compared French towns; the median compared commune in Somme has 2.5%.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
16% of residents 15 and over are single, below 99% 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
46% of residents 15 and over are married; in the typical compared French town the figure is 43%. For single residents, the comparison in the typical compared French town is 25%.
In Cachy, 12% of adults out of school have no qualification, fewer than in 87% 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
30% of adults out of school hold a higher-education qualification in the typical compared French town, against 39% in Cachy. In the typical compared French town, adults with no qualification come to 19%.
Ranked by age, 9th youngest of 41 French towns this size
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.
Cachy sits below 5 of its 6 closest neighbors on median age
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 Cachy
What is the population of Cachy?
300 at INSEE’s 2023 census, 10% more than in 2012 (273).
How old are Cachy’s residents?
The median age is 42.2, younger than 64% of compared French towns. 21% are under 18 and 17% 65 or older.
How many second homes are there in Cachy?
0, with occasional dwellings: 0% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Cachy?
INSEE counts 2 immigrants (born abroad, not French at birth), 0.7% of residents, and 1 foreign nationals (0.4%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Cachy?
€29,320 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.