Much to like here, and you pay for it. Boissy-sous-Saint-Yon grades A− overall, better than 78% of compared French towns, and ranks #9 of 91 in Essonne. What counts against it is cost of living: at the median price, a 70 m² home costs 6.8 times the median annual income per consumption unit in the intercommunality.
Figures: employment, INSEE census 2023 · prices, DVF · income per consumption unit (an income adjusted for household size), INSEE Filosofi.
Hazard risk isn’t graded in France yet: national flood maps cover only some areas. The overall grade uses the other six subjects.
Each subject compares Boissy-sous-Saint-Yon with other French towns of 2,500 or more, ordered by how far its rank is from the middle. American and UK towns are graded separately.
On the Culture ministry’s list, Boissy-sous-Saint-Yon counts 2 historic monuments: 1 classé at the top level of protection and 1 inscrit at the second.
The oldest protected part dates from the 16th century; the first monument here was protected in 1977.
Mademoiselle Hervey, born in 1778, is the one person born in Boissy-sous-Saint-Yon before 1900 that Wikidata records.
Data highlights are ordered by what stands out in Boissy-sous-Saint-Yon.
Work & commuteJobs & income A
Fewer people in Boissy-sous-Saint-Yon are out of work than in Essonne’s towns or across compared French towns: 5.2%
Half of residents lived on more than €31,100 a year per consumption unit, above Essonne’s towns (€29,720) and compared French towns (€25,970) alike. Walking, cycling and public transport carried 14.6% of commuters at the census.
15%walk, cycle or take transit
How working residents got to work · census 2023
Driving81%
Public transport11%
On foot2%
Motorbike or scooter2%
Bicycle1%
600
jobs based in Boissy-sous-Saint-Yon, 0.3 per working resident
5.2%
unemployment rate, ages 15 to 64 in the labor force · median of compared French towns 10.1%
€31,100
median annual income per consumption unit, 2023 · median of compared French towns €25,970
3%
worked without traveling (at or from home)
A−
Walkability: better than 84% of compared French towns
Source: INSEE, census 2023 (commuting, employment, jobs at place of work); INSEE, Filosofi 2023 · Licence Ouverte
Who lives here
A town of families: 20% of people in Boissy-sous-Saint-Yon are under 15, more than in both Essonne’s towns and compared French towns
37% of adults hold a degree, below Essonne’s towns (39%) but above compared French towns (30%). The 65-and-over age group makes up 16% of residents. Young adults of 15 to 24 are just over a tenth of the population.
40.7median age
Boissy-sous-Saint-YonEssonne medianFrance median
Ages · share of residents
11%
Under 1515–2425–4445–6465+
Highest diploma · residents 15 and older who have left education
No diploma16%
CAP or BEP22%
Baccalauréat21%
Higher education37%
Women and men · all residents
51% women, 49% men
WomenFrance medianMen
About an even split. Median share of women: Essonne 51.3%, France 51.8%.
INSEE, census 2023 · Essonne median and France median: the median of compared communes
HousingCost of living C−
The estimated advertised rent in Boissy-sous-Saint-Yon is €15.90/m² a month, against €17.41/m² in Essonne’s towns and €12.41/m² in compared French towns
Rents are the ministry’s estimates of advertised rents, not rents actually paid.
Behind the median of €3,096/m²: 135 houses and apartments sold in Boissy-sous-Saint-Yon between July 2023 and June 2026. Among the homes sold, 81% were houses.
€3,096/m²median sale price
Median sale price per m² · Jul 2023 to Jun 2026
Boissy-sous-Saint-Yon€3,096/m²
Median of towns€2,430/m²
Essonne median€3,237/m²
By type
Median per m²
Sales
Houses
€3,096/m²
109
€15.90/m²
estimated advertised apartment rent a month, charges included (€13.61 to €18.58/m² a month)
6.8
times the median annual income per consumption unit in the intercommunality, for 70 m² at the median price
€13.58/m²
estimated advertised house rent a month, charges included
€31,730
median annual income per consumption unit, Communauté de communes Entre Juine et Renarde (CCEJR)
Source: DGFiP, DVF property sales (Etalab geolocated); Housing Ministry, Carte des loyers 2025; INSEE, Filosofi 2023 · Licence Ouverte
HealthHealth B+
Boissy-sous-Saint-Yon’s death rate, adjusted for age and care homes, is lower than in 72% of compared French towns
Care access and life expectancy are shown for context, not graded.
Ages and care homes taken into account, deaths in Boissy-sous-Saint-Yon come to 80 per 100 predicted. From 2016 to 2025, 195 residents of Boissy-sous-Saint-Yon died, against 243 expected from France’s death rates at each age: 20% fewer. Life expectancy in Essonne: 86.4 years for women and 82.2 for men (2025); France averages 85.9 and 80.3. For a family doctor, residents of Boissy-sous-Saint-Yon can choose among 3 GPs.
−20%deaths against expected, after care homesB+Health Grade
Deaths per 100 expected · 2016–2025
Raw80
Adjusted80
Median town88
Expected100
3
GPs in Boissy-sous-Saint-Yon · 2.4 GP consultations a year per resident within reach (APL)
2.5 mi
to the nearest emergency department, Centre hospitalier
2.5 mi
to the nearest maternity unit, Centre hospitalier
86.4 · 82.2
years of life expectancy at birth, women · men, Essonne, 2025 (provisional) · France 85.9 · 80.3
Boissy-sous-Saint-Yon has less crime per resident than 67% of compared French towns
More of the graded crimes in Boissy-sous-Saint-Yon were criminal damage than anything else (2025). Police and gendarmerie recorded 64 offenses locally in 2025. Violence against people ran at 4.8 per 1,000 residents a year and the graded property crimes at 13.2 (2023–2025 average).
4.8recorded violent incidents per 1,000 residents a yearB+Safety Grade
Recorded by type · 2025
Criminal damage21
Burglary16
Family violence13
Vehicle theft9
Theft from vehicles5
Armed robbery0
Fraud17
Theft without violence11
Not in the gradeTheft without violence, drug use and fraud are shown for information but left out of the Safety Grade, which counts violence plus burglaries, vehicle thefts, thefts from vehicles and criminal damage per resident.
4.8
recorded violent incidents per 1,000 residents a year, 2023–2025 average
13.2
recorded burglaries, vehicle thefts, thefts from vehicles and acts of criminal damage per 1,000 residents a year, 2023–2025 average
64
offenses recorded in the graded categories in 2025
7.3%
of the index rests on the département’s average, used where small counts aren’t published
Source: SSMSI (Interior Ministry), recorded crime by commune, 2023–2025 · Licence Ouverte · For other physical violence and sexual violence, the count isn’t published when it’s small (five or fewer in a year of the last three), so the index uses the département’s average, 7.3% of the index here. The count covers the offense categories the Safety Grade uses.
France has no History Grade yet: this card describes, it doesn’t grade.
The pre-1919 share of homes is 8.3%. Among the classé monuments in Boissy-sous-Saint-Yon is Église Saint-Thomas-Becket. Its heritage reaches back to the 16th century.
On the Culture ministry’s list, Boissy-sous-Saint-Yon counts 2 historic monuments: 1 classé at the top level of protection and 1 inscrit at the second.
People: INSEE, census 2023. Miles: center to center.
Questions about Boissy-sous-Saint-Yon
Is Boissy-sous-Saint-Yon safe?
It grades B+ for safety, #18 of 91 in Essonne. In 2025 police and gendarmerie recorded 16 burglaries and 21 acts of criminal damage.
Are schools in Boissy-sous-Saint-Yon good?
They grade B−, better than 48% of compared French towns and #15 of 94 in Essonne. The lycée stands out: 98% of 450 candidates passed the bac at Lycée René Cassin in 2025, 2 points above the expected rate given its pupils’ backgrounds. Primary schools aren’t graded: France doesn’t publish their results by school.
Is Boissy-sous-Saint-Yon expensive to live in?
Homes cost more than in most compared French towns: the median sale price from July 2023 to June 2026 was €3,096/m², against €2,430/m² for the median of compared French towns. Incomes are higher than in most compared French towns, so Boissy-sous-Saint-Yon grades C− for cost of living.
About Boissy-sous-Saint-Yon
Commune in Essonne, Île-de-France
Boissy-sous-Saint-Yon is a commune of 3,882 people in the Communauté de communes Entre Juine et Renarde (CCEJR). TownRatings compares communes, France’s local unit: each has its own mayor and its own statistics. Its area takes in the town and the countryside around it.
Built from INSEE’s 2026 official geography (COG) and IGN Admin Express boundaries
Population
3,882 (INSEE, census 2023)
Intercommunality
Communauté de communes Entre Juine et Renarde (CCEJR)
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.
