2026 comparison
Mantes-la-Jolie vs Poissy: 2026 comparison
Mantes-la-Jolie has more inhabitants than Poissy: 43,683 versus 41,274, or 5.8% more. Poissy covers a larger area (13.3 km² versus 9.4 km²), but Mantes-la-Jolie is more densely populated: 4,657 inhabitants per km² versus 3,108.
The median apartment price is higher in Poissy: €3,901 per m² versus €2,667. The median standard of living is higher in Poissy (€27,030 a year versus €19,370).
The two cities are 26 km apart as the crow flies, in the same department and the same urban unit (Paris).
© Pierre Poschadel, CC BY-SA 4.0
Mantes-la-Jolie
City in Yvelines
- Population
- 43,683 inhab.
- 178th in France · 4th in its department
- Area
- 9.4 km²
- Density
- 4,657 per km²
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Poissy
City in Yvelines
- Population
- 41,274 inhab.
- 194th in France · 5th in its department
- Area
- 13.3 km²
- Density
- 3,108 per km²
Population
Population and demographics
Municipal population since 1876
Mantes-la-JoliePoissy
| Criterion | Mantes-la-Jolie | Poissy | Difference |
|---|---|---|---|
| Population inhab.More populous: Mantes-la-Jolie+6% | 43,683 | 41,274 | More populous: Mantes-la-Jolie+6% |
| Change over 5 yearsStronger growth: Poissy+8.6 pts | −1.6% | +7.0% | Stronger growth: Poissy+8.6 pts |
| Change over 10 yearsStronger growth: Poissy+13 pts | −3.4% | +9.4% | Stronger growth: Poissy+13 pts |
| Density per km²Denser: Mantes-la-Jolie+50% | 4,657 | 3,108 | Denser: Mantes-la-Jolie+50% |
| Under 15More young people: Mantes-la-Jolie+1.1 pt | 21.9% | 20.8% | More young people: Mantes-la-Jolie+1.1 pt |
| 65 and overMore seniors: Poissy+1.2 pt | 15.4% | 16.6% | More seniors: Poissy+1.2 pt |
| People per householdLarger households: Mantes-la-Jolie+0.25 | 2.48 | 2.23 | Larger households: Mantes-la-Jolie+0.25 |
Sources: INSEE, official population figures, INSEE, censuses, INSEE, census
Housing
Real estate prices and housing
| Criterion | Mantes-la-Jolie | Poissy | Difference |
|---|---|---|---|
| Median apartment price €/m²More expensive: Poissy+46% | 2,667 | 3,901 | More expensive: Poissy+46% |
| Median house price €/m²More expensive: Poissy+57% | 2,998 | 4,710 | More expensive: Poissy+57% |
| Apartment rent €/m² per month, utilities includedMore expensive: Poissy+21% | 15.9 | 19.1 | More expensive: Poissy+21% |
| House rent €/m² per month, utilities includedMore expensive: Poissy+23% | 13.9 | 17.0 | More expensive: Poissy+23% |
| Homeowner householdsMore homeowners: Poissy+11 pts | 30.7% | 41.6% | More homeowners: Poissy+11 pts |
| Share of housesMore houses: Mantes-la-Jolie+0.9 pt | 16.7% | 15.8% | More houses: Mantes-la-Jolie+0.9 pt |
| Social housing (SRU law) share of primary residencesMore social housing: Mantes-la-Jolie+16 pts | 47.3% | 31.4% | More social housing: Mantes-la-Jolie+16 pts |
| Second homesMore second homes: Poissy+0.8 pt | 0.5% | 1.3% | More second homes: Poissy+0.8 pt |
| Vacant homesMore vacant homes: Mantes-la-Jolie+1.2 pt | 6.3% | 5.1% | More vacant homes: Mantes-la-Jolie+1.2 pt |
| Property tax (combined rate)Higher rate: Mantes-la-Jolie+2.0 pt | 37.69% | 35.71% | Higher rate: Mantes-la-Jolie+2.0 pt |
Sources: DGFiP (DVF), Ministry of Housing (rent map), INSEE, census, Ministry for the Ecological Transition (SRU), DGFiP, local taxation
Income and jobs
Residents’ income and jobs
| Criterion | Mantes-la-Jolie | Poissy | Difference |
|---|---|---|---|
| Median standard of living €/yearHigher: Poissy+40% | 19,370 | 27,030 | Higher: Poissy+40% |
| Poverty rateHigher: Mantes-la-Jolie+15 pts | 33.4% | 18.0% | Higher: Mantes-la-Jolie+15 pts |
| Average taxable income per householdHigher: Poissy+58% | €22,149 | €35,087 | Higher: Poissy+58% |
| Households paying income taxMore taxpaying households: Poissy+21 pts | 34% | 54% | More taxpaying households: Poissy+21 pts |
| Activity rate (ages 15-64)Higher: Poissy+12 pts | 67.3% | 79.4% | Higher: Poissy+12 pts |
| Unemployment rate (census)Higher: Mantes-la-Jolie+6.8 pts | 19.2% | 12.4% | Higher: Mantes-la-Jolie+6.8 pts |
Sources: INSEE, Filosofi, DGFiP, income tax, INSEE, census
Local life
Town hall and fiber internet
| Criterion | Mantes-la-Jolie | Poissy | Difference |
|---|---|---|---|
| Mayor | Adama Gaye | Sandrine Berno Dos Santos | |
| Political label of the mayor’s list (2026 local elections) | miscellaneous | miscellaneous right | |
| Premises with fiberBetter covered: Poissy+1.0 pt | 97% | 98% | Better covered: Poissy+1.0 pt |
Sources: Ministry of the Interior, register of elected officials, Ministry of the Interior, Arcep
Shops and facilities
Shops, leisure and transportation
| Criterion | Mantes-la-Jolie | Poissy | Difference |
|---|---|---|---|
| Shops per 10,000 inhab.More shops per capita: Mantes-la-Jolie+21% | 49.0214 in total | 40.5167 in total | More shops per capita: Mantes-la-Jolie+21% |
| Food shops per 10,000 inhab.More per capita: Mantes-la-Jolie+17% | 18.882 in total | 16.066 in total | More per capita: Mantes-la-Jolie+17% |
| Restaurants per 10,000 inhab.More per capita: Mantes-la-Jolie+64% | 42.6186 in total | 25.9107 in total | More per capita: Mantes-la-Jolie+64% |
| Sports facilities per 10,000 inhab.More per capita: Mantes-la-Jolie+67% | 20.690 in total | 12.451 in total | More per capita: Mantes-la-Jolie+67% |
| Cultural venues per 10,000 inhab.More per capita: Poissy+32% | 1.88 in total | 2.410 in total | More per capita: Poissy+32% |
| Hotels per 10,000 inhab.More per capita: Poissy2.1 times as high | 0.52 in total | 1.04 in total | More per capita: Poissy2.1 times as high |
| Passenger train stationsMore stations: Mantes-la-Jolie+1 | 2 | 1 | More stations: Mantes-la-Jolie+1 |
Number of facilities per 10,000 inhabitants (total count in small print). Source: INSEE, facilities database (BPE)
Health
Health care
| Criterion | Mantes-la-Jolie | Poissy | Difference |
|---|---|---|---|
| Access to general practitioners visits/inhab./year localized potential accessibilityBetter access: Mantes-la-Jolie+12% | 2.8 | 2.5 | Better access: Mantes-la-Jolie+12% |
| General practitioners per 10,000 inhab.More per capita: Poissy+9% | 8.537 in total | 9.238 in total | More per capita: Poissy+9% |
| Medical specialists per 10,000 inhab.More per capita: Poissy+6% | 21.393 in total | 22.593 in total | More per capita: Poissy+6% |
| Dentists per 10,000 inhab.Tie | 7.834 in total | 7.832 in total | Tie |
| Pharmacies per 10,000 inhab.More per capita: Mantes-la-Jolie+13% | 2.712 in total | 2.410 in total | More per capita: Mantes-la-Jolie+13% |
| HospitalsMore facilities: Mantes-la-Jolie+3 | 6 | 3 | More facilities: Mantes-la-Jolie+3 |
Practitioners and facilities per 10,000 inhabitants (total count in small print); access to doctors includes those in neighboring communes. Sources: Ministry of Health (DREES), APL, INSEE, facilities database (BPE), Ministry of Health (Finess)
Education
Schools and colleges
| Criterion | Mantes-la-Jolie | Poissy | Difference |
|---|---|---|---|
| Primary schoolsMore schools: Mantes-la-Jolie+13 | 37 | 24 | More schools: Mantes-la-Jolie+13 |
| Middle schoolsMore middle schools: Mantes-la-Jolie+2 | 8 | 6 | More middle schools: Mantes-la-Jolie+2 |
| High schoolsTie | 5 | 5 | Tie |
| Higher education institutions and programsMore facilities: Poissy+4 | 2 | 6 | More facilities: Poissy+4 |
Sources: Ministry of Education, INSEE, facilities database (BPE)
Recorded crime
Offenses recorded by the police
| Criterion | Mantes-la-Jolie | Poissy | Difference |
|---|---|---|---|
| Home burglaries per 1,000 homesHigher rate: Poissy+80% | 3.1 | 5.5 | Higher rate: Poissy+80% |
| Non-violent thefts per 1,000 inhab.Higher rate: Mantes-la-Jolie+11% | 8.3 | 7.5 | Higher rate: Mantes-la-Jolie+11% |
| Physical violence outside the family per 1,000 inhab.Higher rate: Mantes-la-Jolie+38% | 4.5 | 3.3 | Higher rate: Mantes-la-Jolie+38% |
| Vehicle thefts per 1,000 inhab.Higher rate: Mantes-la-Jolie+51% | 2.1 | 1.4 | Higher rate: Mantes-la-Jolie+51% |
| Vandalism and property damage per 1,000 inhab.Higher rate: Mantes-la-Jolie+19% | 8.4 | 7.1 | Higher rate: Mantes-la-Jolie+19% |
Offenses recorded in the commune by the police and gendarmerie, per 1,000 inhabitants (per 1,000 homes for burglaries); this is not the actual crime level. Rates for the latest published year. Source: Ministry of the Interior (SSMSI)
Climate
Temperature, sunshine and rain
| Criterion | Mantes-la-Jolie | Poissy | Difference |
|---|---|---|---|
| Average temperatureWarmer: Poissy+0.9 °C | 11.6°C | 12.5°C | Warmer: Poissy+0.9 °C |
| Sunshine h/year | — | 1,714 | |
| Rainfall mm/yearWetter: Poissy+4% | 642 | 667 | Wetter: Poissy+4% |
| Rainy days days/year at least 1 mmTie | 115 | 115 | Tie |
| Frost days days/yearMore frost days: Mantes-la-Jolie+6 days/year | 40 | 35 | More frost days: Mantes-la-Jolie+6 days/year |
| Very hot days days/year 30 °C or moreMore hot days: Poissy+5 days/year | 12 | 18 | More hot days: Poissy+5 days/year |
Climate normals from the reference Météo-France station of each commune. Source: Météo-France, climate normals
Natural hazards
Natural disasters and prevention
| Criterion | Mantes-la-Jolie | Poissy | Difference |
|---|---|---|---|
| Natural disasters declared since 1982More declarations: Poissy+4 | 3 | 7 | More declarations: Poissy+4 |
| Natural hazard prevention plansTie | 2 | 2 | Tie |
| Radon potentialSame | Low | Low | Same |
Sources: Géorisques (GASPAR), IRSN
Land
Area, terrain and administrative areas
| Criterion | Mantes-la-Jolie | Poissy | Difference |
|---|---|---|---|
| Area km²Larger: Poissy+42% | 9.38 | 13.3 | Larger: Poissy+42% |
| Town hall elevationHigher: Mantes-la-Jolie+5 m | 39 m | 34 m | Higher: Mantes-la-Jolie+5 m |
| Coastal communeSame | No | No | Same |
| Density grid (INSEE)Same | Large urban centre | Large urban centre | Same |
| DepartmentSame | Yvelines (78) | Yvelines (78) | Same |
| IntercommunalitySame | Communauté urbaine Grand Paris Seine et Oise | Communauté urbaine Grand Paris Seine et Oise | Same |
| Urban unitSame | Paris | Paris | Same |
| Functional areaSame | Paris | Paris | Same |
Sources: IGN, IGN, elevation, Ministry for the Ecological Transition, Loi Littoral, INSEE, density grid, INSEE, COG, INSEE, geographic classifications
Summary
Mantes-la-Jolie vs Poissy at a glance
| Criterion | Mantes-la-Jolie | Poissy |
|---|---|---|
| Population inhab. | 43,683 | 41,274 |
| Change over 10 years | −3.4% | +9.4% |
| Density per km² | 4,657 | 3,108 |
| Median apartment price €/m² | 2,667 | 3,901 |
| Median house price €/m² | 2,998 | 4,710 |
| Apartment rent €/m² | 15.9 | 19.1 |
| Property tax (combined rate) | 37.69% | 35.71% |
| Median standard of living €/year | 19,370 | 27,030 |
| Unemployment rate (census) | 19.2% | 12.4% |
| Premises with fiber | 97% | 98% |
| Access to general practitioners visits/inhab./year | 2.8 | 2.5 |
| Home burglaries per 1,000 homes | 3.1 | 5.5 |
| Average temperature | 11.6°C | 12.5°C |
| Sunshine h/year | — | 1,714 |
| Area km² | 9.38 | 13.3 |
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FAQ
Mantes-la-Jolie vs Poissy: your questions
Which is the larger city, Mantes-la-Jolie or Poissy?
By population, Mantes-la-Jolie: 43,683 inhabitants versus 41,274 for Poissy (official population figures in force on January 1, 2026). Mantes-la-Jolie is the 178th largest city in France, Poissy the 194th. By area, Poissy is the larger (13.3 km²).
How far is Mantes-la-Jolie from Poissy?
Mantes-la-Jolie and Poissy are 26 km apart as the crow flies, between the centers of the two communes, in the same department (Yvelines).
Where is real estate more expensive, in Mantes-la-Jolie or Poissy?
To buy an apartment, Poissy is more expensive: €3,901 per m² (median price), versus €2,667 in Mantes-la-Jolie (+46%). Median prices of sales over the last five years (DGFiP, DVF).
Where is the standard of living higher, in Mantes-la-Jolie or Poissy?
In Poissy, half of the residents have a standard of living above €27,030 a year, versus €19,370 in Mantes-la-Jolie (disposable income per consumption unit, INSEE).
Are Mantes-la-Jolie and Poissy in the same department?
Yes: both towns are in Yvelines (78), in the Île-de-France region.
Official population figures in force on January 1, 2026. Source: INSEE, official population figures