2026 comparison
Chatou vs Poissy: 2026 comparison
Poissy has more inhabitants than Chatou: 41,274 versus 31,112, or 33% more. Poissy covers a larger area (13.3 km² versus 5.1 km²), but Chatou is more densely populated: 6,124 inhabitants per km² versus 3,108.
The median apartment price is higher in Chatou: €4,832 per m² versus €3,901. The median standard of living is higher in Chatou (€38,150 a year versus €27,030).
The two cities are 9.7 km apart as the crow flies, in the same department and the same urban unit (Paris).
Chatou
City in Yvelines
- Population
- 31,112 inhab.
- 278th in France · 13th in its department
- Area
- 5.1 km²
- Density
- 6,124 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
ChatouPoissy
| Criterion | Chatou | Poissy | Difference |
|---|---|---|---|
| Population inhab.More populous: Poissy+33% | 31,112 | 41,274 | More populous: Poissy+33% |
| Change over 5 yearsStronger growth: Poissy+6.1 pts | +0.9% | +7.0% | Stronger growth: Poissy+6.1 pts |
| Change over 10 yearsStronger growth: Poissy+10 pts | −0.7% | +9.4% | Stronger growth: Poissy+10 pts |
| Density per km²Denser: Chatou+97% | 6,124 | 3,108 | Denser: Chatou+97% |
| Under 15More young people: Poissy+1.1 pt | 19.7% | 20.8% | More young people: Poissy+1.1 pt |
| 65 and overMore seniors: Chatou+0.2 pt | 16.8% | 16.6% | More seniors: Chatou+0.2 pt |
| People per householdLarger households: Chatou+0.08 | 2.31 | 2.23 | Larger households: Chatou+0.08 |
Sources: INSEE, official population figures, INSEE, censuses, INSEE, census
Housing
Real estate prices and housing
| Criterion | Chatou | Poissy | Difference |
|---|---|---|---|
| Median apartment price €/m²More expensive: Chatou+24% | 4,832 | 3,901 | More expensive: Chatou+24% |
| Median house price €/m²More expensive: Chatou+55% | 7,302 | 4,710 | More expensive: Chatou+55% |
| Apartment rent €/m² per month, utilities includedMore expensive: Chatou+16% | 22.2 | 19.1 | More expensive: Chatou+16% |
| House rent €/m² per month, utilities includedMore expensive: Chatou+33% | 22.7 | 17.0 | More expensive: Chatou+33% |
| Homeowner householdsMore homeowners: Chatou+20 pts | 61.1% | 41.6% | More homeowners: Chatou+20 pts |
| Share of housesMore houses: Chatou+12 pts | 27.9% | 15.8% | More houses: Chatou+12 pts |
| Social housing (SRU law) share of primary residencesMore social housing: Poissy+14 pts | 17.8% | 31.4% | More social housing: Poissy+14 pts |
| Second homesMore second homes: Chatou+0.9 pt | 2.2% | 1.3% | More second homes: Chatou+0.9 pt |
| Vacant homesMore vacant homes: Chatou+2.1 pts | 7.2% | 5.1% | More vacant homes: Chatou+2.1 pts |
| Property tax (combined rate)Higher rate: Poissy+12 pts | 24.01% | 35.71% | Higher rate: Poissy+12 pts |
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 | Chatou | Poissy | Difference |
|---|---|---|---|
| Median standard of living €/yearHigher: Chatou+41% | 38,150 | 27,030 | Higher: Chatou+41% |
| Poverty rateHigher: Poissy+10 pts | 7.8% | 18.0% | Higher: Poissy+10 pts |
| Average taxable income per householdHigher: Chatou+73% | €60,722 | €35,087 | Higher: Chatou+73% |
| Households paying income taxMore taxpaying households: Chatou+14 pts | 68% | 54% | More taxpaying households: Chatou+14 pts |
| Activity rate (ages 15-64)Higher: Poissy+0.0 pt | 79.3% | 79.4% | Higher: Poissy+0.0 pt |
| Unemployment rate (census)Higher: Poissy+4.2 pts | 8.2% | 12.4% | Higher: Poissy+4.2 pts |
Sources: INSEE, Filosofi, DGFiP, income tax, INSEE, census
Local life
Town hall and fiber internet
| Criterion | Chatou | Poissy | Difference |
|---|---|---|---|
| Mayor | Eric Dumoulin | Sandrine Berno Dos Santos | |
| Political label of the mayor’s list (2026 local elections)Same | miscellaneous right | miscellaneous right | Same |
| Premises with fiberBetter covered: Chatou+1.9 pt | 100% | 98% | Better covered: Chatou+1.9 pt |
Sources: Ministry of the Interior, register of elected officials, Ministry of the Interior, Arcep
Shops and facilities
Shops, leisure and transportation
| Criterion | Chatou | Poissy | Difference |
|---|---|---|---|
| Shops per 10,000 inhab.More shops per capita: Poissy+13% | 35.7111 in total | 40.5167 in total | More shops per capita: Poissy+13% |
| Food shops per 10,000 inhab.More per capita: Poissy+4% | 15.448 in total | 16.066 in total | More per capita: Poissy+4% |
| Restaurants per 10,000 inhab.More per capita: Poissy+44% | 18.056 in total | 25.9107 in total | More per capita: Poissy+44% |
| Sports facilities per 10,000 inhab.More per capita: Poissy+16% | 10.633 in total | 12.451 in total | More per capita: Poissy+16% |
| Cultural venues per 10,000 inhab.More per capita: Poissy+26% | 1.96 in total | 2.410 in total | More per capita: Poissy+26% |
| Hotels per 10,000 inhab.More per capita: Poissy3.0 times as high | 0.31 in total | 1.04 in total | More per capita: Poissy3.0 times as high |
| Passenger train stationsTie | 1 | 1 | Tie |
Number of facilities per 10,000 inhabitants (total count in small print). Source: INSEE, facilities database (BPE)
Health
Health care
| Criterion | Chatou | Poissy | Difference |
|---|---|---|---|
| Access to general practitioners visits/inhab./year localized potential accessibilityBetter access: Poissy+0.7% | 2.4 | 2.5 | Better access: Poissy+0.7% |
| General practitioners per 10,000 inhab.More per capita: Poissy3.2 times as high | 2.99 in total | 9.238 in total | More per capita: Poissy3.2 times as high |
| Medical specialists per 10,000 inhab.More per capita: Poissy4.1 times as high | 5.517 in total | 22.593 in total | More per capita: Poissy4.1 times as high |
| Dentists per 10,000 inhab.More per capita: Poissy+21% | 6.420 in total | 7.832 in total | More per capita: Poissy+21% |
| Pharmacies per 10,000 inhab.More per capita: Poissy+8% | 2.27 in total | 2.410 in total | More per capita: Poissy+8% |
| HospitalsMore facilities: Poissy+3 | 0 | 3 | More facilities: Poissy+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 | Chatou | Poissy | Difference |
|---|---|---|---|
| Primary schoolsMore schools: Poissy+10 | 14 | 24 | More schools: Poissy+10 |
| Middle schoolsMore middle schools: Poissy+2 | 4 | 6 | More middle schools: Poissy+2 |
| High schoolsMore high schools: Poissy+4 | 1 | 5 | More high schools: Poissy+4 |
| Higher education institutions and programsMore facilities: Poissy+6 | 0 | 6 | More facilities: Poissy+6 |
Sources: Ministry of Education, INSEE, facilities database (BPE)
Recorded crime
Offenses recorded by the police
| Criterion | Chatou | Poissy | Difference |
|---|---|---|---|
| Home burglaries per 1,000 homesHigher rate: Chatou+7% | 5.9 | 5.5 | Higher rate: Chatou+7% |
| Non-violent thefts per 1,000 inhab.Higher rate: Chatou+26% | 9.4 | 7.5 | Higher rate: Chatou+26% |
| Physical violence outside the family per 1,000 inhab.Higher rate: Poissy3.0 times as high | 1.1 | 3.3 | Higher rate: Poissy3.0 times as high |
| Vehicle thefts per 1,000 inhab.Higher rate: Poissy+49% | 0.9 | 1.4 | Higher rate: Poissy+49% |
| Vandalism and property damage per 1,000 inhab.Higher rate: Poissy+56% | 4.5 | 7.1 | Higher rate: Poissy+56% |
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 | Chatou | Poissy | Difference |
|---|---|---|---|
| Average temperatureWarmer: Poissy+0.2 °C | 12.3°C | 12.5°C | Warmer: Poissy+0.2 °C |
| Sunshine h/yearSunnier: Chatou+0.2% | 1,717 | 1,714 | Sunnier: Chatou+0.2% |
| Rainfall mm/yearWetter: Poissy+17% | 571 | 667 | Wetter: Poissy+17% |
| Rainy days days/year at least 1 mmMore rainy days: Poissy+9 days/year | 106 | 115 | More rainy days: Poissy+9 days/year |
| Frost days days/yearMore frost days: Chatou+9 days/year | 43 | 35 | More frost days: Chatou+9 days/year |
| Very hot days days/year 30 °C or moreMore hot days: Poissy+2 days/year | 16 | 18 | More hot days: Poissy+2 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 | Chatou | Poissy | Difference |
|---|---|---|---|
| Natural disasters declared since 1982More declarations: Chatou+4 | 11 | 7 | More declarations: Chatou+4 |
| Natural hazard prevention plansTie | 2 | 2 | Tie |
| Radon potentialSame | Low | Low | Same |
Sources: Géorisques (GASPAR), IRSN
Land
Area, terrain and administrative areas
| Criterion | Chatou | Poissy | Difference |
|---|---|---|---|
| Area km²Larger: Poissy2.6 times as high | 5.08 | 13.3 | Larger: Poissy2.6 times as high |
| Town hall elevationHigher: Chatou+1 m | 35 m | 34 m | Higher: Chatou+1 m |
| Coastal communeSame | No | No | Same |
| Density grid (INSEE)Same | Large urban centre | Large urban centre | Same |
| DepartmentSame | Yvelines (78) | Yvelines (78) | Same |
| Intercommunality | Communauté d'agglomération Saint Germain Boucles de Seine | Communauté urbaine Grand Paris Seine et Oise | |
| 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
Chatou vs Poissy at a glance
| Criterion | Chatou | Poissy |
|---|---|---|
| Population inhab. | 31,112 | 41,274 |
| Change over 10 years | −0.7% | +9.4% |
| Density per km² | 6,124 | 3,108 |
| Median apartment price €/m² | 4,832 | 3,901 |
| Median house price €/m² | 7,302 | 4,710 |
| Apartment rent €/m² | 22.2 | 19.1 |
| Property tax (combined rate) | 24.01% | 35.71% |
| Median standard of living €/year | 38,150 | 27,030 |
| Unemployment rate (census) | 8.2% | 12.4% |
| Premises with fiber | 100% | 98% |
| Access to general practitioners visits/inhab./year | 2.4 | 2.5 |
| Home burglaries per 1,000 homes | 5.9 | 5.5 |
| Average temperature | 12.3°C | 12.5°C |
| Sunshine h/year | 1,717 | 1,714 |
| Area km² | 5.08 | 13.3 |
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Compare with other towns
FAQ
Chatou vs Poissy: your questions
Which is the larger city, Chatou or Poissy?
By population, Poissy: 41,274 inhabitants versus 31,112 for Chatou (official population figures in force on January 1, 2026). Poissy is the 194th largest city in France, Chatou the 278th. By area, Poissy is also the larger (13.3 km²).
How far is Chatou from Poissy?
Chatou and Poissy are 9.7 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 Chatou or Poissy?
To buy an apartment, Chatou is more expensive: €4,832 per m² (median price), versus €3,901 in Poissy (+24%). Median prices of sales over the last five years (DGFiP, DVF).
Where is the standard of living higher, in Chatou or Poissy?
In Chatou, half of the residents have a standard of living above €38,150 a year, versus €27,030 in Poissy (disposable income per consumption unit, INSEE).
Which city is sunnier, Chatou or Poissy?
Chatou: 1,717 hours of sunshine a year on average, versus 1,714 in Poissy (climate normals from the reference Météo-France station of each town).
Official population figures in force on January 1, 2026. Source: INSEE, official population figures