2026 comparison
Cergy vs Conflans-Sainte-Honorine: 2026 comparison
Cergy has more inhabitants than Conflans-Sainte-Honorine: 71,250 versus 37,426, or 90% more. Cergy is both larger (11.7 km² versus 9.9 km²) and more densely populated (6,116 inhabitants per km² versus 3,780).
The median apartment price is higher in Conflans-Sainte-Honorine: €3,444 per m² versus €3,320. The median standard of living is higher in Conflans-Sainte-Honorine (€30,870 a year versus €22,560).
The two cities are 5.6 km apart as the crow flies, in the same urban unit (Paris).
© L. Pages - Ville de Cergy, CC BY-SA 4.0
Cergy
City in Val-d'Oise
- Population
- 71,250 inhab.
- 74th in France · 2nd in its department
- Area
- 11.7 km²
- Density
- 6,116 per km²
Conflans-Sainte-Honorine
City in Yvelines
- Population
- 37,426 inhab.
- 219th in France · 6th in its department
- Area
- 9.9 km²
- Density
- 3,780 per km²
Population
Population and demographics
Municipal population since 1876
CergyConflans-Sainte-Honorine
| Criterion | Cergy | Conflans-Sainte-Honorine | Difference |
|---|---|---|---|
| Population inhab.More populous: Cergy+90% | 71,250 | 37,426 | More populous: Cergy+90% |
| Change over 5 yearsStronger growth: Cergy+3.3 pts | +6.9% | +3.7% | Stronger growth: Cergy+3.3 pts |
| Change over 10 yearsStronger growth: Cergy+10.0 pts | +14.9% | +5.0% | Stronger growth: Cergy+10.0 pts |
| Density per km²Denser: Cergy+62% | 6,116 | 3,780 | Denser: Cergy+62% |
| Under 15More young people: Cergy+2.9 pts | 22.6% | 19.7% | More young people: Cergy+2.9 pts |
| 65 and overMore seniors: Conflans-Sainte-Honorine+6.9 pts | 9.1% | 16.0% | More seniors: Conflans-Sainte-Honorine+6.9 pts |
| People per householdLarger households: Conflans-Sainte-Honorine+0.01 | 2.41 | 2.42 | Larger households: Conflans-Sainte-Honorine+0.01 |
Sources: INSEE, official population figures, INSEE, censuses, INSEE, census
Housing
Real estate prices and housing
| Criterion | Cergy | Conflans-Sainte-Honorine | Difference |
|---|---|---|---|
| Median apartment price €/m²More expensive: Conflans-Sainte-Honorine+4% | 3,320 | 3,444 | More expensive: Conflans-Sainte-Honorine+4% |
| Median house price €/m²More expensive: Conflans-Sainte-Honorine+41% | 3,113 | 4,404 | More expensive: Conflans-Sainte-Honorine+41% |
| Apartment rent €/m² per month, utilities includedMore expensive: Cergy+0.9% | 18.5 | 18.3 | More expensive: Cergy+0.9% |
| House rent €/m² per month, utilities includedMore expensive: Conflans-Sainte-Honorine+3% | 16.5 | 16.9 | More expensive: Conflans-Sainte-Honorine+3% |
| Homeowner householdsMore homeowners: Conflans-Sainte-Honorine+30 pts | 30.9% | 61.1% | More homeowners: Conflans-Sainte-Honorine+30 pts |
| Share of housesMore houses: Conflans-Sainte-Honorine+36 pts | 15.8% | 52.1% | More houses: Conflans-Sainte-Honorine+36 pts |
| Social housing (SRU law) share of primary residencesMore social housing: Cergy+24 pts | 47.1% | 23.0% | More social housing: Cergy+24 pts |
| Second homesMore second homes: Cergy+3.1 pts | 4.4% | 1.3% | More second homes: Cergy+3.1 pts |
| Vacant homesMore vacant homes: Cergy+2.7 pts | 7.9% | 5.2% | More vacant homes: Cergy+2.7 pts |
| Property tax (combined rate)Higher rate: Cergy+8.9 pts | 47.54% | 38.64% | Higher rate: Cergy+8.9 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 | Cergy | Conflans-Sainte-Honorine | Difference |
|---|---|---|---|
| Median standard of living €/yearHigher: Conflans-Sainte-Honorine+37% | 22,560 | 30,870 | Higher: Conflans-Sainte-Honorine+37% |
| Poverty rateHigher: Cergy+13 pts | 24.9% | 11.8% | Higher: Cergy+13 pts |
| Average taxable income per householdHigher: Conflans-Sainte-Honorine+60% | €24,053 | €38,532 | Higher: Conflans-Sainte-Honorine+60% |
| Households paying income taxMore taxpaying households: Conflans-Sainte-Honorine+20 pts | 38% | 59% | More taxpaying households: Conflans-Sainte-Honorine+20 pts |
| Activity rate (ages 15-64)Higher: Conflans-Sainte-Honorine+6.1 pts | 72.1% | 78.2% | Higher: Conflans-Sainte-Honorine+6.1 pts |
| Unemployment rate (census)Higher: Cergy+5.5 pts | 15.1% | 9.6% | Higher: Cergy+5.5 pts |
Sources: INSEE, Filosofi, DGFiP, income tax, INSEE, census
Local life
Town hall and fiber internet
| Criterion | Cergy | Conflans-Sainte-Honorine | Difference |
|---|---|---|---|
| Mayor | Jean-Paul Jeandon | Raphaël Prats | |
| Political label of the mayor’s list (2026 local elections) | union of the left | miscellaneous left | |
| Premises with fiberTie | 99% | 99% | Tie |
Sources: Ministry of the Interior, register of elected officials, Ministry of the Interior, Arcep
Shops and facilities
Shops, leisure and transportation
| Criterion | Cergy | Conflans-Sainte-Honorine | Difference |
|---|---|---|---|
| Shops per 10,000 inhab.More shops per capita: Cergy+10% | 39.2279 in total | 35.5133 in total | More shops per capita: Cergy+10% |
| Food shops per 10,000 inhab.More per capita: Conflans-Sainte-Honorine+8% | 13.395 in total | 14.454 in total | More per capita: Conflans-Sainte-Honorine+8% |
| Restaurants per 10,000 inhab.More per capita: Conflans-Sainte-Honorine+1% | 30.6218 in total | 31.0116 in total | More per capita: Conflans-Sainte-Honorine+1% |
| Sports facilities per 10,000 inhab.More per capita: Cergy+37% | 14.6104 in total | 10.740 in total | More per capita: Cergy+37% |
| Cultural venues per 10,000 inhab.More per capita: Cergy+5% | 1.712 in total | 1.66 in total | More per capita: Cergy+5% |
| Hotels per 10,000 inhab.More per capita: Cergy+31% | 1.410 in total | 1.14 in total | More per capita: Cergy+31% |
| Passenger train stationsMore stations: Cergy+1 | 3 | 2 | More stations: Cergy+1 |
Number of facilities per 10,000 inhabitants (total count in small print). Source: INSEE, facilities database (BPE)
Health
Health care
| Criterion | Cergy | Conflans-Sainte-Honorine | Difference |
|---|---|---|---|
| Access to general practitioners visits/inhab./year localized potential accessibilityBetter access: Cergy+23% | 3.0 | 2.4 | Better access: Cergy+23% |
| General practitioners per 10,000 inhab.More per capita: Conflans-Sainte-Honorine+48% | 3.827 in total | 5.621 in total | More per capita: Conflans-Sainte-Honorine+48% |
| Medical specialists per 10,000 inhab.More per capita: Conflans-Sainte-Honorine+27% | 3.827 in total | 4.818 in total | More per capita: Conflans-Sainte-Honorine+27% |
| Dentists per 10,000 inhab.More per capita: Cergy+5% | 7.352 in total | 6.926 in total | More per capita: Cergy+5% |
| Pharmacies per 10,000 inhab.Tie | 2.115 in total | 2.18 in total | Tie |
| HospitalsMore facilities: Conflans-Sainte-Honorine+1 | 1 | 2 | More facilities: Conflans-Sainte-Honorine+1 |
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 | Cergy | Conflans-Sainte-Honorine | Difference |
|---|---|---|---|
| Primary schoolsMore schools: Cergy+35 | 53 | 18 | More schools: Cergy+35 |
| Middle schoolsMore middle schools: Cergy+5 | 10 | 5 | More middle schools: Cergy+5 |
| High schoolsMore high schools: Cergy+2 | 4 | 2 | More high schools: Cergy+2 |
| Higher education institutions and programsMore facilities: Cergy+27 | 27 | 0 | More facilities: Cergy+27 |
Sources: Ministry of Education, INSEE, facilities database (BPE)
Recorded crime
Offenses recorded by the police
| Criterion | Cergy | Conflans-Sainte-Honorine | Difference |
|---|---|---|---|
| Home burglaries per 1,000 homesHigher rate: Conflans-Sainte-Honorine+78% | 4.3 | 7.7 | Higher rate: Conflans-Sainte-Honorine+78% |
| Non-violent thefts per 1,000 inhab.Higher rate: Cergy+88% | 12.9 | 6.9 | Higher rate: Cergy+88% |
| Physical violence outside the family per 1,000 inhab.Higher rate: Cergy+31% | 3.3 | 2.5 | Higher rate: Cergy+31% |
| Vehicle thefts per 1,000 inhab.Higher rate: Cergy+22% | 2.9 | 2.4 | Higher rate: Cergy+22% |
| Vandalism and property damage per 1,000 inhab.Higher rate: Conflans-Sainte-Honorine+3% | 6.6 | 6.8 | Higher rate: Conflans-Sainte-Honorine+3% |
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)
Natural hazards
Natural disasters and prevention
| Criterion | Cergy | Conflans-Sainte-Honorine | Difference |
|---|---|---|---|
| Natural disasters declared since 1982More declarations: Cergy+3 | 21 | 18 | More declarations: Cergy+3 |
| Natural hazard prevention plansTie | 2 | 2 | Tie |
| Radon potentialSame | Low | Low | Same |
Sources: Géorisques (GASPAR), IRSN
Land
Area, terrain and administrative areas
| Criterion | Cergy | Conflans-Sainte-Honorine | Difference |
|---|---|---|---|
| Area km²Larger: Cergy+18% | 11.7 | 9.90 | Larger: Cergy+18% |
| Town hall elevationHigher: Cergy+63 m | 94 m | 31 m | Higher: Cergy+63 m |
| Coastal communeSame | No | No | Same |
| Density grid (INSEE)Same | Large urban centre | Large urban centre | Same |
| Department | Val-d'Oise (95) | Yvelines (78) | |
| Intercommunality | Communauté d'agglomération de Cergy-Pontoise | 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
Cergy vs Conflans-Sainte-Honorine at a glance
| Criterion | Cergy | Conflans-Sainte-Honorine |
|---|---|---|
| Population inhab. | 71,250 | 37,426 |
| Change over 10 years | +14.9% | +5.0% |
| Density per km² | 6,116 | 3,780 |
| Median apartment price €/m² | 3,320 | 3,444 |
| Median house price €/m² | 3,113 | 4,404 |
| Apartment rent €/m² | 18.5 | 18.3 |
| Property tax (combined rate) | 47.54% | 38.64% |
| Median standard of living €/year | 22,560 | 30,870 |
| Unemployment rate (census) | 15.1% | 9.6% |
| Premises with fiber | 99% | 99% |
| Access to general practitioners visits/inhab./year | 3.0 | 2.4 |
| Home burglaries per 1,000 homes | 4.3 | 7.7 |
| Average temperature | 12.5°C | 12.5°C |
| Sunshine h/year | — | 1,634 |
| Area km² | 11.7 | 9.90 |
More comparisons
Compare with other towns
FAQ
Cergy vs Conflans-Sainte-Honorine: your questions
Which is the larger city, Cergy or Conflans-Sainte-Honorine?
By population, Cergy: 71,250 inhabitants versus 37,426 for Conflans-Sainte-Honorine (official population figures in force on January 1, 2026). Cergy is the 74th largest city in France, Conflans-Sainte-Honorine the 219th. By area, Cergy is also the larger (11.7 km²).
How far is Cergy from Conflans-Sainte-Honorine?
Cergy and Conflans-Sainte-Honorine are 5.6 km apart as the crow flies, between the centers of the two communes.
Where is real estate more expensive, in Cergy or Conflans-Sainte-Honorine?
To buy an apartment, Conflans-Sainte-Honorine is more expensive: €3,444 per m² (median price), versus €3,320 in Cergy (+4%). Median prices of sales over the last five years (DGFiP, DVF).
Where is the standard of living higher, in Cergy or Conflans-Sainte-Honorine?
In Conflans-Sainte-Honorine, half of the residents have a standard of living above €30,870 a year, versus €22,560 in Cergy (disposable income per consumption unit, INSEE).
Are Cergy and Conflans-Sainte-Honorine in the same department?
No: Cergy is in Val-d'Oise (95), and Conflans-Sainte-Honorine in Yvelines (78), both in the Île-de-France region.
Official population figures in force on January 1, 2026. Source: INSEE, official population figures