Health is a strength: after allowing for care homes, deaths from 2016 to 2025 were 27% below expected, against 12% below for the median of compared French towns. The weak point is cost of living — at the median price, a 70 m² home costs 7.9 times the median annual income per consumption unit in the intercommunality. Elsewhere it is close to typical: B− for schools, B for jobs & income and B− for walkability. Holiday and other second homes account for just over a fifth of homes.
Figures: deaths, INSEE (by commune of residence, 2016–2025) · prices, DVF · income per consumption unit (an income adjusted for household size), INSEE Filosofi · brevet and bac results, Ministry of Education · employment and commuting, INSEE census 2023 · amenities, INSEE BPE 2025. Mézy-sur-Seine has subject grades but no overall grade: French towns get one from 2,500 residents.
Hazard risk isn’t graded in France yet: national flood maps cover only some areas.
Each subject compares Mézy-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 Mézy-sur-Seine.
HousingCost of living D
Renting in Mézy-sur-Seine costs an estimated advertised €16.23/m² a month, against €18.40/m² in Yvelines’ towns and €12.41/m² in compared French towns
Rents are the ministry’s estimates of advertised rents, not rents actually paid.
68 sales of houses and apartments in Mézy-sur-Seine, from July 2023 to June 2026, give the median of €3,031/m². Houses made up 87% of the homes sold; apartments the rest. A house rents for an estimated €14.68/m² a month.
€3,031/m²median sale price
Median sale price per m² · Jul 2023 to Jun 2026
Mézy-sur-Seine€3,031/m²
Median of towns€2,430/m²
Yvelines median€3,717/m²
By type
Median per m²
Sales
Houses
€3,087/m²
59
€16.23/m²
estimated advertised apartment rent a month, charges included (€13.56 to €19.42/m² a month)
7.9
times the median annual income per consumption unit in the intercommunality, for 70 m² at the median price
€14.68/m²
estimated advertised house rent a month, charges included
€26,750
median annual income per consumption unit, Communauté urbaine Grand Paris Seine et Oise
Source: DGFiP, DVF property sales (Etalab geolocated); Housing Ministry, Carte des loyers 2025; INSEE, Filosofi 2023 · Licence Ouverte
HealthHealth A
Mézy-sur-Seine’s grade for health: an A
Care access and life expectancy are shown for context, not graded.
Ages and care homes taken into account, deaths in Mézy-sur-Seine come to 73 per 100 predicted. 235 deaths in the town between 2016 and 2025, where France’s rates at each age predict 232: 1% above. In Yvelines, women can expect to live 86.8 years and men 82.3 (2025), against 85.9 and 80.3 across France. One GP practises in the town.
−27%deaths against expected, after care homesAHealth Grade
Deaths per 100 expected · 2016–2025
Raw101
Adjusted73
Median town88
Expected100
1
GPs in Mézy-sur-Seine · 1.7 GP consultations a year per resident within reach (APL)
1.5 mi
to the nearest emergency department, Centre hospitalier Intercommunal de Meulan les Mureaux
1.5 mi
to the nearest maternity unit, Centre hospitalier Intercommunal de Meulan les Mureaux
86.8 · 82.3
years of life expectancy at birth, women · men, Yvelines, 2025 (provisional) · France 85.9 · 80.3
Students and young workers shape Mézy-sur-Seine: 13% are 15 to 24, above Yvelines’ towns and compared French towns
Over-65s are nearly a fifth of the population. 17% are under 15, about level with compared French towns (17%) and below Yvelines’ towns (20%). Among adults, 41% have a degree.
41.6median age
Mézy-sur-SeineYvelines medianFrance median
Ages · share of residents
13%
Under 1515–2425–4445–6465+
Highest diploma · residents 15 and older who have left education
No diploma16%
CAP or BEP20%
Baccalauréat17%
Higher education41%
Women and men · all residents
49% women, 51% men
WomenFrance medianMen
About an even split. Median share of women: Yvelines 51.6%, France 51.8%.
INSEE, census 2023 · Yvelines median and France median: the median of compared communes
History
Old homes shape Mézy-sur-Seine: 23% were built before 1919, more than in both Yvelines’ towns and compared French towns
France has no History Grade yet: this card describes, it doesn’t grade.
The oldest protected building goes back to the 13th century. The Culture ministry lists 2 historic monuments in Mézy-sur-Seine, none of them classé, France’s highest protection.
Ministry of Education (DEPP) · brevet and bac 2025, value added (IVAC, IVAL) · Licence Ouverte
Work & commuteJobs & income B
In Mézy-sur-Seine, 25.7% of commuters go on foot, by bike or by public transport, against 35.4% in Yvelines’ towns and 13.4% in compared French towns
Nearly a tenth of the labour force were unemployed, below both Yvelines’ towns (8.7%) and compared French towns (10.1%). Jobs located in Mézy-sur-Seine: 300, for 1,000 residents in work (0.3 each). After tax and benefits, the median income is €32,400 a year per consumption unit.
26%walk, cycle or take transit
How working residents got to work · census 2023
Driving69%
Public transport19%
On foot5%
Bicycle1%
Motorbike or scooter1%
300
jobs based in Mézy-sur-Seine, 0.3 per working resident
8.2%
unemployment rate, ages 15 to 64 in the labor force · median of compared French towns 10.1%
€32,400
median annual income per consumption unit, 2023 · median of compared French towns €25,970
5%
worked without traveling (at or from home)
B−
Walkability: better than 53% of compared French towns
People: INSEE, census 2023. Miles: center to center.
Questions about Mézy-sur-Seine
Is Mézy-sur-Seine safe?
Mézy-sur-Seine has no Safety Grade: over a quarter of its index would rest on the département’s average. Recorded figures: an average of 5.6 recorded violent incidents and 6.7 recorded burglaries, vehicle thefts, thefts from vehicles and acts of criminal damage per 1,000 residents a year, 2023–2025.
Are schools in Mézy-sur-Seine good?
They grade B−, better than 45% of compared French towns. 94% of 361 candidates passed the bac at Lycée François Villon in 2025, at the expected rate given its pupils’ backgrounds. Primary schools aren’t graded: France doesn’t publish their results by school.
Is Mézy-sur-Seine expensive to live in?
Homes cost more than in most compared French towns: the median sale price from July 2023 to June 2026 was €3,031/m², against €2,430/m² for the median of compared French towns. Incomes are higher than in most compared French towns, so Mézy-sur-Seine grades D for cost of living.
About Mézy-sur-Seine
Commune in Yvelines, Île-de-France
Mézy-sur-Seine is a commune of 2,242 people in the Communauté urbaine Grand Paris Seine et Oise. 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.
