2026 comparison
Mantes-la-Jolie vs Saint-Germain-en-Laye: 2026 comparison
Saint-Germain-en-Laye has more inhabitants than Mantes-la-Jolie: 47,628 versus 43,683, or 9.0% more. Saint-Germain-en-Laye covers a larger area (51.9 km² versus 9.4 km²), but Mantes-la-Jolie is more densely populated: 4,657 inhabitants per km² versus 917.
The median apartment price is higher in Saint-Germain-en-Laye: €6,547 per m² versus €2,667. The median standard of living is higher in Saint-Germain-en-Laye (€37,970 a year versus €19,370).
The two cities are 31 km apart as the crow flies, in the same department and the same urban unit (Paris).
© Pierre Poschadel, CC BY-SA 4.0
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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
Saint-Germain-en-Laye
City in Yvelines
- Population
- 47,628 inhab.
- 145th in France · 3rd in its department
- Area
- 51.9 km²
- Density
- 917 per km²
Population
Population and demographics
Municipal population since 1876
Mantes-la-JolieSaint-Germain-en-Laye
| Criterion | Mantes-la-Jolie | Saint-Germain-en-Laye | Difference |
|---|---|---|---|
| Population inhab.More populous: Saint-Germain-en-Laye+9% | 43,683 | 47,628 | More populous: Saint-Germain-en-Laye+9% |
| Change over 5 yearsStronger growth: Saint-Germain-en-Laye+4.2 pts | −1.6% | +2.6% | Stronger growth: Saint-Germain-en-Laye+4.2 pts |
| Change over 10 yearsStronger growth: Saint-Germain-en-Laye+8.8 pts | −3.4% | +5.4% | Stronger growth: Saint-Germain-en-Laye+8.8 pts |
| Density per km²Denser: Mantes-la-Jolie5.1 times as high | 4,657 | 917 | Denser: Mantes-la-Jolie5.1 times as high |
| Under 15More young people: Mantes-la-Jolie+2.8 pts | 21.9% | 19.1% | More young people: Mantes-la-Jolie+2.8 pts |
| 65 and overMore seniors: Saint-Germain-en-Laye+2.7 pts | 15.4% | 18.2% | More seniors: Saint-Germain-en-Laye+2.7 pts |
| People per householdLarger households: Mantes-la-Jolie+0.30 | 2.48 | 2.18 | Larger households: Mantes-la-Jolie+0.30 |
Sources: INSEE, official population figures, INSEE, censuses, INSEE, census
Housing
Real estate prices and housing
| Criterion | Mantes-la-Jolie | Saint-Germain-en-Laye | Difference |
|---|---|---|---|
| Median apartment price €/m²More expensive: Saint-Germain-en-Laye2.5 times as high | 2,667 | 6,547 | More expensive: Saint-Germain-en-Laye2.5 times as high |
| Median house price €/m²More expensive: Saint-Germain-en-Laye2.4 times as high | 2,998 | 7,193 | More expensive: Saint-Germain-en-Laye2.4 times as high |
| Apartment rent €/m² per month, utilities includedMore expensive: Saint-Germain-en-Laye+48% | 15.9 | 23.5 | More expensive: Saint-Germain-en-Laye+48% |
| House rent €/m² per month, utilities includedMore expensive: Saint-Germain-en-Laye+87% | 13.9 | 26.0 | More expensive: Saint-Germain-en-Laye+87% |
| Homeowner householdsMore homeowners: Saint-Germain-en-Laye+18 pts | 30.7% | 49.1% | More homeowners: Saint-Germain-en-Laye+18 pts |
| Share of housesMore houses: Saint-Germain-en-Laye+3.0 pts | 16.7% | 19.8% | More houses: Saint-Germain-en-Laye+3.0 pts |
| Social housing (SRU law) share of primary residencesMore social housing: Mantes-la-Jolie+22 pts | 47.3% | 25.2% | More social housing: Mantes-la-Jolie+22 pts |
| Second homesMore second homes: Saint-Germain-en-Laye+3.7 pts | 0.5% | 4.2% | More second homes: Saint-Germain-en-Laye+3.7 pts |
| Vacant homesMore vacant homes: Mantes-la-Jolie+2.0 pts | 6.3% | 4.3% | More vacant homes: Mantes-la-Jolie+2.0 pts |
| Property tax (combined rate)Higher rate: Mantes-la-Jolie+13 pts | 37.69% | 24.95% | Higher rate: Mantes-la-Jolie+13 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 | Mantes-la-Jolie | Saint-Germain-en-Laye | Difference |
|---|---|---|---|
| Median standard of living €/yearHigher: Saint-Germain-en-Laye+96% | 19,370 | 37,970 | Higher: Saint-Germain-en-Laye+96% |
| Poverty rateHigher: Mantes-la-Jolie+24 pts | 33.4% | 9.5% | Higher: Mantes-la-Jolie+24 pts |
| Average taxable income per householdHigher: Saint-Germain-en-Laye3.1 times as high | €22,149 | €69,214 | Higher: Saint-Germain-en-Laye3.1 times as high |
| Households paying income taxMore taxpaying households: Saint-Germain-en-Laye+32 pts | 34% | 66% | More taxpaying households: Saint-Germain-en-Laye+32 pts |
| Activity rate (ages 15-64)Higher: Saint-Germain-en-Laye+9.5 pts | 67.3% | 76.8% | Higher: Saint-Germain-en-Laye+9.5 pts |
| Unemployment rate (census)Higher: Mantes-la-Jolie+9.7 pts | 19.2% | 9.5% | Higher: Mantes-la-Jolie+9.7 pts |
Sources: INSEE, Filosofi, DGFiP, income tax, INSEE, census
Local life
Town hall and fiber internet
| Criterion | Mantes-la-Jolie | Saint-Germain-en-Laye | Difference |
|---|---|---|---|
| Mayor | Adama Gaye | Arnaud Pericard | |
| Political label of the mayor’s list (2026 local elections) | miscellaneous | miscellaneous right | |
| Premises with fiberBetter covered: Mantes-la-Jolie+1.8 pt | 97% | 95% | Better covered: Mantes-la-Jolie+1.8 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 | Saint-Germain-en-Laye | Difference |
|---|---|---|---|
| Shops per 10,000 inhab.More shops per capita: Saint-Germain-en-Laye+61% | 49.0214 in total | 78.9376 in total | More shops per capita: Saint-Germain-en-Laye+61% |
| Food shops per 10,000 inhab.More per capita: Saint-Germain-en-Laye+23% | 18.882 in total | 23.1110 in total | More per capita: Saint-Germain-en-Laye+23% |
| Restaurants per 10,000 inhab.More per capita: Mantes-la-Jolie+34% | 42.6186 in total | 31.7151 in total | More per capita: Mantes-la-Jolie+34% |
| Sports facilities per 10,000 inhab.More per capita: Mantes-la-Jolie+40% | 20.690 in total | 14.770 in total | More per capita: Mantes-la-Jolie+40% |
| Cultural venues per 10,000 inhab.More per capita: Saint-Germain-en-Laye+49% | 1.88 in total | 2.713 in total | More per capita: Saint-Germain-en-Laye+49% |
| Hotels per 10,000 inhab.More per capita: Saint-Germain-en-Laye3.2 times as high | 0.52 in total | 1.57 in total | More per capita: Saint-Germain-en-Laye3.2 times as high |
| Passenger train stationsTie | 2 | 2 | Tie |
Number of facilities per 10,000 inhabitants (total count in small print). Source: INSEE, facilities database (BPE)
Health
Health care
| Criterion | Mantes-la-Jolie | Saint-Germain-en-Laye | Difference |
|---|---|---|---|
| Access to general practitioners visits/inhab./year localized potential accessibilityBetter access: Mantes-la-Jolie+15% | 2.8 | 2.4 | Better access: Mantes-la-Jolie+15% |
| General practitioners per 10,000 inhab.More per capita: Mantes-la-Jolie+6% | 8.537 in total | 8.038 in total | More per capita: Mantes-la-Jolie+6% |
| Medical specialists per 10,000 inhab.More per capita: Saint-Germain-en-Laye+7% | 21.393 in total | 22.9109 in total | More per capita: Saint-Germain-en-Laye+7% |
| Dentists per 10,000 inhab.More per capita: Saint-Germain-en-Laye+29% | 7.834 in total | 10.148 in total | More per capita: Saint-Germain-en-Laye+29% |
| Pharmacies per 10,000 inhab.More per capita: Saint-Germain-en-Laye+15% | 2.712 in total | 3.115 in total | More per capita: Saint-Germain-en-Laye+15% |
| HospitalsMore facilities: Mantes-la-Jolie+2 | 6 | 4 | More facilities: Mantes-la-Jolie+2 |
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 | Saint-Germain-en-Laye | Difference |
|---|---|---|---|
| Primary schoolsMore schools: Mantes-la-Jolie+13 | 37 | 24 | More schools: Mantes-la-Jolie+13 |
| Middle schoolsMore middle schools: Saint-Germain-en-Laye+3 | 8 | 11 | More middle schools: Saint-Germain-en-Laye+3 |
| High schoolsMore high schools: Saint-Germain-en-Laye+10 | 5 | 15 | More high schools: Saint-Germain-en-Laye+10 |
| Higher education institutions and programsMore facilities: Saint-Germain-en-Laye+5 | 2 | 7 | More facilities: Saint-Germain-en-Laye+5 |
Sources: Ministry of Education, INSEE, facilities database (BPE)
Recorded crime
Offenses recorded by the police
| Criterion | Mantes-la-Jolie | Saint-Germain-en-Laye | Difference |
|---|---|---|---|
| Home burglaries per 1,000 homesHigher rate: Saint-Germain-en-Laye2.0 times as high | 3.1 | 6.2 | Higher rate: Saint-Germain-en-Laye2.0 times as high |
| Non-violent thefts per 1,000 inhab.Higher rate: Saint-Germain-en-Laye+39% | 8.3 | 11.6 | Higher rate: Saint-Germain-en-Laye+39% |
| Physical violence outside the family per 1,000 inhab.Higher rate: Mantes-la-Jolie+49% | 4.5 | 3.0 | Higher rate: Mantes-la-Jolie+49% |
| Vehicle thefts per 1,000 inhab.Higher rate: Mantes-la-Jolie2.0 times as high | 2.1 | 1.1 | Higher rate: Mantes-la-Jolie2.0 times as high |
| Vandalism and property damage per 1,000 inhab.Higher rate: Mantes-la-Jolie+35% | 8.4 | 6.2 | Higher rate: Mantes-la-Jolie+35% |
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 | Saint-Germain-en-Laye | Difference |
|---|---|---|---|
| Average temperatureWarmer: Saint-Germain-en-Laye+0.7 °C | 11.6°C | 12.3°C | Warmer: Saint-Germain-en-Laye+0.7 °C |
| Sunshine h/year | — | 1,714 | |
| Rainfall mm/yearWetter: Mantes-la-Jolie+12% | 642 | 571 | Wetter: Mantes-la-Jolie+12% |
| Rainy days days/year at least 1 mmMore rainy days: Mantes-la-Jolie+10 days/year | 115 | 106 | More rainy days: Mantes-la-Jolie+10 days/year |
| Frost days days/yearMore frost days: Saint-Germain-en-Laye+3 days/year | 40 | 43 | More frost days: Saint-Germain-en-Laye+3 days/year |
| Very hot days days/year 30 °C or moreMore hot days: Saint-Germain-en-Laye+4 days/year | 12 | 16 | More hot days: Saint-Germain-en-Laye+4 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 | Saint-Germain-en-Laye | Difference |
|---|---|---|---|
| Natural disasters declared since 1982More declarations: Saint-Germain-en-Laye+22 | 3 | 25 | More declarations: Saint-Germain-en-Laye+22 |
| 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 | Saint-Germain-en-Laye | Difference |
|---|---|---|---|
| Area km²Larger: Saint-Germain-en-Laye5.5 times as high | 9.38 | 51.9 | Larger: Saint-Germain-en-Laye5.5 times as high |
| Town hall elevationHigher: Saint-Germain-en-Laye+49 m | 39 m | 88 m | Higher: Saint-Germain-en-Laye+49 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 urbaine Grand Paris Seine et Oise | Communauté d'agglomération Saint Germain Boucles de Seine | |
| 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 Saint-Germain-en-Laye at a glance
| Criterion | Mantes-la-Jolie | Saint-Germain-en-Laye |
|---|---|---|
| Population inhab. | 43,683 | 47,628 |
| Change over 10 years | −3.4% | +5.4% |
| Density per km² | 4,657 | 917 |
| Median apartment price €/m² | 2,667 | 6,547 |
| Median house price €/m² | 2,998 | 7,193 |
| Apartment rent €/m² | 15.9 | 23.5 |
| Property tax (combined rate) | 37.69% | 24.95% |
| Median standard of living €/year | 19,370 | 37,970 |
| Unemployment rate (census) | 19.2% | 9.5% |
| Premises with fiber | 97% | 95% |
| Access to general practitioners visits/inhab./year | 2.8 | 2.4 |
| Home burglaries per 1,000 homes | 3.1 | 6.2 |
| Average temperature | 11.6°C | 12.3°C |
| Sunshine h/year | — | 1,714 |
| Area km² | 9.38 | 51.9 |
More comparisons
Compare with other towns
FAQ
Mantes-la-Jolie vs Saint-Germain-en-Laye: your questions
Which is the larger city, Mantes-la-Jolie or Saint-Germain-en-Laye?
By population, Saint-Germain-en-Laye: 47,628 inhabitants versus 43,683 for Mantes-la-Jolie (official population figures in force on January 1, 2026). Saint-Germain-en-Laye is the 145th largest city in France, Mantes-la-Jolie the 178th. By area, Saint-Germain-en-Laye is also the larger (51.9 km²).
How far is Mantes-la-Jolie from Saint-Germain-en-Laye?
Mantes-la-Jolie and Saint-Germain-en-Laye are 31 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 Saint-Germain-en-Laye?
To buy an apartment, Saint-Germain-en-Laye is more expensive: €6,547 per m² (median price), versus €2,667 in Mantes-la-Jolie (+145%). Median prices of sales over the last five years (DGFiP, DVF).
Where is the standard of living higher, in Mantes-la-Jolie or Saint-Germain-en-Laye?
In Saint-Germain-en-Laye, half of the residents have a standard of living above €37,970 a year, versus €19,370 in Mantes-la-Jolie (disposable income per consumption unit, INSEE).
Are Mantes-la-Jolie and Saint-Germain-en-Laye 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