--- entity_id: city:fr:insee5:95127 entity_type: city name: Cergy country_code: FR country: France slug: cergy canonical_url: https://immigrationdb.com/cities/fr/cergy/ json_url: https://immigrationdb.com/data/cities/fr/cergy.json markdown_url: https://immigrationdb.com/data/cities/fr/cergy.md mcp_uri: immigrationdb://city/fr/cergy snapshot_id: approved-static-bb6d69cd3c074ae2 generated_at: 2026-08-04 last_verified: 2026-08-01 fact_count: 20 metric_dictionary_url: https://immigrationdb.com/data/metrics.json license_url: https://immigrationdb.com/about/copyright/ --- # Cergy Cergy is a city in France. In 2022, population density was 5,972.4 people per km². The unemployment rate was 15.6% at the end of 2022. For Cergy, gigabit broadband availability was 98.4% in March 2026. Its population was 70,906 at the start of 2024. The city covered 11.7 km² in 2022. ## Climate Annual PM2.5 was 9.39 µg/m³ in 2024. Annual NO₂ was 17.4 µg/m³ in 2024. Annual PM10 was 11.6 µg/m³ in 2024. ## Immigration The foreign population count was 15,127 in 2021. ## Facts | Metric | metric_id | Value | Scope | Observed | Verified | Freshness | Lane | Source | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Foreign residents | `foreign_population_total` | 15,127 people | city | 2021 | 2026-07-15 | stale | verified | [1] | | Population | `population_total` | 70,906 people | municipality | 2025-01-01 | 2026-07-14 | aging | verified | [2] | | NO₂ — latest reading | `air_quality_no2_current_ug_m3` | 15.1333 µg/m³ | city | 2026-07-15 | 2026-07-15 | fresh | verified | [3] | | Gigabit broadband availability | `broadband_gigabit_availability_percent` | 98.43 % | city | 2026-03-31 | 2026-07-15 | fresh | verified | [4] | | Unemployment rate | `unemployment_total_percent` | 15.6141 % | city | 2022-12-31 | 2026-07-26 | stale | verified | [5] | | NO₂ — annual mean | `air_quality_no2_annual_ug_m3` | 17.4121 µg/m³ | city | 2024 | 2026-07-15 | stale | verified | [6] | | PM10 — annual mean | `air_quality_pm10_annual_ug_m3` | 11.6159 µg/m³ | city | 2024 | 2026-07-15 | stale | verified | [6] | | PM2.5 — annual mean | `air_quality_pm25_annual_ug_m3` | 9.3924 µg/m³ | city | 2024 | 2026-07-15 | stale | verified | [6] | | Average daytime high by month | `climate_monthly_high_c` | Jan 7 · Feb 8.2 · Mar 12 · Apr 15.6 · May 19 · Jun 22.3 · Jul 24.9 · Aug 24.9 · Sep 21 · Oct 16 · Nov 10.7 · Dec 7.4 °C | nearest_station | 1991-12-31 | 2026-07-31 | stale | verified | [7] | | Average night-time low by month | `climate_monthly_low_c` | Jan 1.6 · Feb 1.4 · Mar 3.2 · Apr 4.8 · May 8.2 · Jun 11 · Jul 12.9 · Aug 12.8 · Sep 10 · Oct 7.7 · Nov 4.4 · Dec 2.1 °C | nearest_station | 1991-12-31 | 2026-07-31 | stale | verified | [7] | | Average temperature by month | `climate_monthly_mean_c` | Jan 4.3 · Feb 4.8 · Mar 7.6 · Apr 10.2 · May 13.6 · Jun 16.7 · Jul 18.9 · Aug 18.8 · Sep 15.5 · Oct 11.9 · Nov 7.5 · Dec 4.7 °C | nearest_station | 1991-12-31 | 2026-07-31 | stale | verified | [7] | | Average precipitation by month | `climate_monthly_precip_mm` | Jan 54.1 · Feb 45.9 · Mar 46.9 · Apr 43.9 · May 59.8 · Jun 50.2 · Jul 51.6 · Aug 55.4 · Sep 46.7 · Oct 58.2 · Nov 54.8 · Dec 68.3 mm | nearest_station | 1991-12-31 | 2026-07-31 | stale | verified | [7] | | City area | `city_area_km2` | 11.65 km2 | place | 2022-01-01 | 2026-07-14 | stale | verified | [8] | | Fitness club membership, monthly | `col_fitness_club_eur_month` | 40 EUR/month | city | 2024-12-31 | 2026-08-01 | stale | supplemental | [9] | | Internet, 60 Mbps unlimited | `col_internet_60mbps_eur_month` | 20 EUR/month | city | 2024-12-31 | 2026-08-01 | stale | supplemental | [9] | | Private kindergarten, monthly | `col_kindergarten_private_eur_month` | 400 EUR/month | city | 2024-12-31 | 2026-08-01 | stale | supplemental | [9] | | Mobile plan, 10 GB | `col_mobile_plan_10gb_eur_month` | 24.28 EUR/month | city | 2024-12-31 | 2026-08-01 | stale | supplemental | [9] | | Monthly transport pass | `col_transport_monthly_pass_eur` | 80 EUR/month | city | 2024-12-31 | 2026-08-01 | stale | supplemental | [9] | | Basic utilities, 85 m² home | `col_utilities_basic_85m2_eur_month` | 118.04 EUR/month | city | 2024-12-31 | 2026-08-01 | stale | supplemental | [9] | | Population density | `population_density_per_km2` | 5,972.3605 people/km² | place | 2022-01-01 | 2026-07-14 | stale | verified | [8] | Every row keeps the value, unit, geographic scope, observation date, verification date and the numbered source below. A missing metric means the city does not publish it; nothing is imputed. ## Sources 1. Nationalité en 2021 — Base des tableaux détaillés — NAT1 — Official source — https://www.insee.fr/fr/statistiques/fichier/8202752/TD_NAT1_2021_csv.zip 2. France official denominator source — Official source — https://www.insee.fr/fr/statistiques/fichier/8680726/ensemble.zip 3. Latest valid NO2 hourly station observation on the official LCSQA E2 current-day extract, mapped to the exact INSEE centre through an exact normalized station-name crosswalk to EEA station metadata. — Official source — https://files.data.gouv.fr/ineris/lcsqa/concentrations-de-polluants-atmospheriques-reglementes/temps-reel/2026/FR_E2_2026-07-15.csv 4. Independent ARCEP municipal count of premises eligible for the >=1 Gbit/s fixed advertised-speed class, divided by the ARCEP type=all municipal premises denominator. This is availability/eligibility, not adoption, measured speed, FTTH-only coverage or mobile coverage. — Official source — https://data.arcep.fr/fixe/maconnexioninternet/statistiques/2026_T1/commune/commune_debit.csv 5. INSEE RP2022 ACT1 — population active by type of activity, commune — Official source — https://www.insee.fr/fr/statistiques/fichier/8581605/TD_ACT1_2022_csv.zip 6. 2024 validated hourly NO2 station observations transformed to the exact INSEE commune centre by deterministic nearest-station selection and equal-weight aggregation. — Official source — https://air.discomap.eea.europa.eu/arcgis/rest/services/AirQuality/AirQualityDownloadServiceEUMonitoringStations/MapServer 7. WMO Climatological Normals 1991-2020 — station PONTOISE_-_AERO — Official source — https://www.ncei.noaa.gov/data/oceans/archive/arc0216/0253808/1.1/data/0-data/Region-6-WMO-Normals-9120/France/CSV/PONTOISE_AERO_07053.csv 8. A-ccepted source for city area and derived population density — Official source — https://www.insee.fr/fr/statistiques/fichier/2521169/base_cc_comparateur_csv.zip 9. Numbeo — Cost of Living in Cergy (Wayback capture 20241207140829) — Independent source — https://web.archive.org/web/20241207140829/https://www.numbeo.com/cost-of-living/in/Cergy ## Cite ImmigrationDB. "Cergy, France." Snapshot approved-static-bb6d69cd3c074ae2, last verified 2026-08-01. https://immigrationdb.com/cities/fr/cergy/ Reuse requires the direct source URL, the observation date and a link back to the ImmigrationDB page: https://immigrationdb.com/about/copyright/ ## Data - HTML: https://immigrationdb.com/cities/fr/cergy/ - JSON: https://immigrationdb.com/data/cities/fr/cergy.json - Markdown: https://immigrationdb.com/data/cities/fr/cergy.md - MCP resource: immigrationdb://city/fr/cergy - Metric dictionary: https://immigrationdb.com/data/metrics.json - All published city facts, one row each: https://immigrationdb.com/data/facts.ndjson.gz - Release catalog: https://immigrationdb.com/data/catalog.json