The picture is mixed. Its schools fall short: bac results 5.7 points below the expected rate; brevet results 6.3 points below the expected rate. Prices are high against local incomes (D): at the median price, a 70 m² home costs 9.1 times the median annual income per consumption unit in the intercommunality. Fewer journeys need a car: just over nine in ten residents live within 800 m of a bakery, and 43% of working residents walk, cycle or take public transport to work. Health is another plus — after allowing for care homes, deaths from 2016 to 2025 were 23% below expected, against 12% below for the median of compared French towns. Overall, that makes a C−, good for #32 of 73 in Val-d'Oise. Nationally, it does better than nearly a quarter of compared French towns.
Figures: amenities, INSEE BPE 2025 · commuting, INSEE census 2023 · deaths, INSEE (by commune of residence, 2016–2025) · brevet and bac results, Ministry of Education · 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 Herblay-sur-Seine 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.
Data highlights are ordered by what stands out in Herblay-sur-Seine.
Schools
Schools around Herblay-sur-Seine do less well than those of 96% of compared French towns
Primary schools aren’t graded: France doesn’t publish their results by school.
The brevet pass rate near Herblay-sur-Seine is 79.9%, below both Val-d'Oise’s towns (82.7%) and compared French towns (87.5%). The bac pro: 68% of 574 candidates passed at the 4 vocational lycées within 5 km. Ranked by results, schools here are #70 of 76 in Val-d'Oise.
90%passed the bac (general and technological)D−School Grade
Ministry of Education (DEPP) · brevet and bac 2025, value added (IVAC, IVAL) · Licence Ouverte
HousingCost of living D
Renting in Herblay-sur-Seine costs more than in both Val-d'Oise’s towns and compared French towns, at an estimated advertised €19.59/m² a month
Rents are the ministry’s estimates of advertised rents, not rents actually paid.
A house in Herblay-sur-Seine goes for €3,947/m², an apartment for €3,605/m². The middle sale price: €3,799/m², above both Val-d'Oise’s towns (€3,266/m²) and compared French towns (€2,430/m²). The town recorded 884 home sales from July 2023 to June 2026.
€3,799/m²median sale price
Median sale price per m² · Jul 2023 to Jun 2026
Herblay-sur-Seine€3,799/m²
Median of towns€2,430/m²
Val-d'Oise median€3,266/m²
By type
Median per m²
Sales
Houses
€3,947/m²
503
Apartments
€3,605/m²
381
€19.59/m²
estimated advertised apartment rent a month, charges included (€16.74 to €22.92/m² a month)
9.1
times the median annual income per consumption unit in the intercommunality, for 70 m² at the median price
€16.94/m²
estimated advertised house rent a month, charges included
€29,070
median annual income per consumption unit, Communauté d'agglomération Val Parisis
Source: DGFiP, DVF property sales (Etalab geolocated); Housing Ministry, Carte des loyers 2025; INSEE, Filosofi 2023 · Licence Ouverte
Work & commuteJobs & income B+
Herblay-sur-Seine is easier to get around on foot than 94% of compared French towns
Per consumption unit, the median disposable income is €30,160 a year. Herblay-sur-Seine has 8,450 jobs for 14,250 working residents, 0.6 per worker. Bus, tram or train carried 38.9% of working residents in Herblay-sur-Seine to work at the census.
43%walk, cycle or take transit
How working residents got to work · census 2023
Driving52%
Public transport39%
On foot3%
Motorbike or scooter2%
Bicycle1%
8,450
jobs based in Herblay-sur-Seine, 0.6 per working resident
9.4%
unemployment rate, ages 15 to 64 in the labor force · median of compared French towns 10.1%
€30,160
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 94% of compared French towns
Source: INSEE, census 2023 (commuting, employment, jobs at place of work); INSEE, Filosofi 2023 · Licence Ouverte
Who lives here
More people in Herblay-sur-Seine hold a degree than in Val-d'Oise’s towns or compared French towns: 45%
People 65 and over make up 13% of the town, below Val-d'Oise’s towns (15%) and compared French towns (22%) alike. Young adults of 15 to 24 are 13% of the population. Half the people of Herblay-sur-Seine are older than 37.3.
37.3median age
Herblay-sur-SeineVal-d'Oise medianFrance median
Ages · share of residents
13%
Under 1515–2425–4445–6465+
Highest diploma · residents 15 and older who have left education
No diploma15%
CAP or BEP18%
Baccalauréat18%
Higher education45%
Women and men · all residents
52% women, 48% men
WomenFrance medianMen
About 91 men for every 100 women. Median share of women: Val-d'Oise 51.5%, France 51.8%.
INSEE, census 2023 · Val-d'Oise median and France median: the median of compared communes
HealthHealth A−
Allowing for age and care homes, Herblay-sur-Seine sees fewer deaths than Val-d'Oise’s towns or compared French towns: 77 per 100 expected
Care access and life expectancy are shown for context, not graded.
In Val-d'Oise, life expectancy at birth reaches 85.9 years for women and 81.1 for men (2025), next to 85.9 and 80.3 for France. 1,714 deaths in Herblay-sur-Seine between 2016 and 2025, where France’s rates at each age predict 2,022: 15% below. The nearest emergency department to Herblay-sur-Seine is Plyclinique de Maisons Laffitte Ex Hopital des Courses, 3.3 mi away.
−23%deaths against expected, after care homesA−Health Grade
Deaths per 100 expected · 2016–2025
Raw85
Adjusted77
Median town88
Expected100
15
GPs in Herblay-sur-Seine · 2.3 GP consultations a year per resident within reach (APL)
3.3 mi
to the nearest emergency department, Plyclinique de Maisons Laffitte Ex Hopital des Courses
5.2 mi
to the nearest maternity unit, Clinique Claude Bernard
85.9 · 81.1
years of life expectancy at birth, women · men, Val-d'Oise, 2025 (provisional) · France 85.9 · 80.3
Recorded crime per resident is higher in Herblay-sur-Seine than in 75% of compared French towns
The graded crime recorded most in Herblay-sur-Seine was criminal damage (2025). Recorded offenses here came to 754 in 2025. Violence against people ran at 6.4 per 1,000 residents a year and the graded property crimes at 21.5 (2023–2025 average).
6.4recorded violent incidents per 1,000 residents a yearCSafety Grade
Recorded by type · 2025
Criminal damage243
Theft from vehicles135
Vehicle theft93
Burglary91
Family violence90
Other physical violence54
Sexual violence48
Theft without violence214
Fraud158
Drug use65
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.
6.4
recorded violent incidents per 1,000 residents a year, 2023–2025 average
21.5
recorded burglaries, vehicle thefts, thefts from vehicles and acts of criminal damage per 1,000 residents a year, 2023–2025 average
754
offenses recorded in the graded categories in 2025
0.2%
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 armed robbery, 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, 0.2% of the index here. The count covers the offense categories the Safety Grade uses.
History
Herblay-sur-Seine has 1 historic monument, none of them classé
France has no History Grade yet: this card describes, it doesn’t grade.
Homes from before 1919 make up 3.8% of the total, below Val-d'Oise’s towns (4.1%) and compared French towns (7.4%) alike. Protection here reaches back to the 9th century.
People: INSEE, census 2023. Miles: center to center.
Questions about Herblay-sur-Seine
Is Herblay-sur-Seine safe?
It grades C for safety, #49 of 73 in Val-d'Oise. In 2025 police and gendarmerie recorded 91 burglaries and 243 acts of criminal damage.
Are schools in Herblay-sur-Seine good?
They grade D−, better than 4% of compared French towns and #70 of 76 in Val-d'Oise. 93% of 349 candidates passed the bac at Lycée Montesquieu in 2025, 2 points below the expected rate given its pupils’ backgrounds. Primary schools aren’t graded: France doesn’t publish their results by school.
Is Herblay-sur-Seine expensive to live in?
Incomes are higher than in most compared French towns, so Herblay-sur-Seine grades D for cost of living.
About Herblay-sur-Seine
Commune in Val-d'Oise, Île-de-France
Herblay-sur-Seine is a commune of 31,779 people in the Communauté d'agglomération Val Parisis. 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
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.
