--- entity_id: city:be:nis5:23096 entity_type: city name: Zemst country_code: BE country: Belgium slug: zemst canonical_url: https://immigrationdb.com/cities/be/zemst/ json_url: https://immigrationdb.com/data/cities/be/zemst.json markdown_url: https://immigrationdb.com/data/cities/be/zemst.md mcp_uri: immigrationdb://city/be/zemst snapshot_id: approved-static-bb6d69cd3c074ae2 generated_at: 2026-08-04 last_verified: 2026-07-31 fact_count: 14 metric_dictionary_url: https://immigrationdb.com/data/metrics.json license_url: https://immigrationdb.com/about/copyright/ --- # Zemst The foreign population count was 875 at the start of 2026. For Zemst, the unemployment rate was 2.62% at the start of 2011. The population of Zemst, in Belgium, was 23,367 at the start of 2026. Gigabit broadband availability was 97.5% in June 2025. ## Population The city covered 43.2 km² in 2025. Population density was 540.5 people per km² in 2026. ## Climate Annual PM2.5 was 8.09 µg/m³ at the end of 2024. Annual NO₂ was 11.2 µg/m³ at the end of 2024. ## Facts | Metric | metric_id | Value | Scope | Observed | Verified | Freshness | Lane | Source | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Foreign residents | `foreign_population_total` | 875 people | city | 2026-01-01 | 2026-07-15 | fresh | verified | [1] | | Population | `population_total` | 23,367 people | municipality | 2026-01-01 | 2026-07-14 | fresh | verified | [2] | | Gigabit broadband availability | `broadband_gigabit_availability_percent` | 97.5109 % | city | 2025-06 | 2026-07-15 | aging | verified | [3] | | Unemployment rate | `unemployment_total_percent` | 2.62 % | city | 2011-01-01 | 2026-07-26 | stale | verified | [4] | | NO₂ — annual mean | `air_quality_no2_annual_ug_m3` | 11.1757 µg/m³ | city | 2024-12-31 | 2026-07-15 | stale | verified | [5] | | PM10 — annual mean | `air_quality_pm10_annual_ug_m3` | 14.2645 µg/m³ | city | 2024-12-31 | 2026-07-15 | stale | verified | [6] | | PM2.5 — annual mean | `air_quality_pm25_annual_ug_m3` | 8.0863 µg/m³ | city | 2024-12-31 | 2026-07-15 | stale | verified | [7] | | Average daytime high by month | `climate_monthly_high_c` | Jan 6.4 · Feb 7.2 · Mar 10.9 · Apr 15.1 · May 18.6 · Jun 21.5 · Jul 23.7 · Aug 23.5 · Sep 19.9 · Oct 15.1 · Nov 10.1 · Dec 6.7 °C | nearest_station | 2020-12-31 | 2026-07-31 | stale | verified | [8] | | Average night-time low by month | `climate_monthly_low_c` | Jan 1.2 · Feb 1 · Mar 2.7 · Apr 5 · May 8.7 · Jun 11.7 · Jul 13.7 · Aug 13.4 · Sep 10.5 · Oct 7.4 · Nov 4.3 · Dec 1.9 °C | nearest_station | 2020-12-31 | 2026-07-31 | stale | verified | [8] | | Average temperature by month | `climate_monthly_mean_c` | Jan 3.8 · Feb 4.1 · Mar 6.8 · Apr 10 · May 13.6 · Jun 16.6 · Jul 18.7 · Aug 18.4 · Sep 15.2 · Oct 11.3 · Nov 7.2 · Dec 4.3 °C | nearest_station | 2020-12-31 | 2026-07-31 | stale | verified | [8] | | Average precipitation by month | `climate_monthly_precip_mm` | Jan 66.6 · Feb 57.3 · Mar 52.2 · Apr 42.5 · May 56.2 · Jun 66.6 · Jul 71.3 · Aug 78 · Sep 59.1 · Oct 62.1 · Nov 69.6 · Dec 81.4 mm | nearest_station | 2020-12-31 | 2026-07-31 | stale | verified | [8] | | Average sunshine by month | `climate_monthly_sunshine_h` | Jan 59.1 · Feb 72.9 · Mar 125.8 · Apr 171.3 · May 198.3 · Jun 199.3 · Jul 203.2 · Aug 192.4 · Sep 154.5 · Oct 112.6 · Nov 65.8 · Dec 48.6 hours | nearest_station | 2020-12-31 | 2026-07-31 | stale | verified | [9] | | City area | `city_area_km2` | 43.2284 km2 | city | 2025-01-01 | 2026-07-15 | aging | verified | [10] | | Population density | `population_density_per_km2` | 540.548 people/km² | city | 2026-01-01 | 2026-07-15 | fresh | verified | [11] | 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. Official population by nationality at municipality grain; foreign population is TOTAL minus Belgique in the TOTAL row. — Official source — https://statbel.fgov.be/sites/default/files/files/documents/bevolking/5.1%20Structuur%20van%20de%20bevolking/popstranger-1992-fr.xlsx 2. Belgium official denominator source — Official source — https://statbel.fgov.be/sites/default/files/files/opendata/bevolking%20naar%20woonplaats%2C%20nationaliteit%20burgelijke%20staat%20%2C%20leeftijd%20en%20geslacht/TF_SOC_POP_STRUCT_2026.zip 3. BIPT/IBPT fixed broadband Atlas municipality row: H_rate_1000 is the share of households with access to fixed broadband at a maximum attainable speed of at least 1,000 Mbps; availability, not subscribed plan or measured speed. H_1000 is the covered-household count and total_households is the denominator. — Official source — https://www.bipt-data.be/en/projects/data/opendata 4. Statbel be.STAT — unemployment rate of 15–64-year-olds by municipality, Census 2011 — Independent source — https://bestat.statbel.fgov.be/bestat/api/views/51bc2007-36b3-4f96-a540-823018b2dd67/result/JSON 5. Official RIO v2025 annual mean derived from daily population-weighted municipality concentrations for NIS5 11055; period 2024-01-01..2024-12-31 — Official source — http://ftp.irceline.be/rio4x4/gemeente/fgem_pop_no2_1990_2024.csv 6. Official RIO v2025 annual mean derived from daily population-weighted municipality concentrations for NIS5 13019; period 2024-01-01..2024-12-31 — Official source — http://ftp.irceline.be/rio4x4/gemeente/fgem_pop_pm10_1997_2024.csv 7. Official RIO v2025 annual mean derived from daily population-weighted municipality concentrations for NIS5 62093; period 2024-01-01..2024-12-31 — Official source — http://ftp.irceline.be/rio4x4/gemeente/fgem_pop_pm25_2008_2024.csv 8. WMO Climatological Normals 1991-2020 — station BRUSSELSNATIONALAIRPORT_06451.csv — Official source — https://www.ncei.noaa.gov/data/oceans/archive/arc0216/0253808/1.1/data/0-data/Region-6-WMO-Normals-9120/Belgium/CSV/BRUSSELSNATIONALAIRPORT_06451.csv 9. WMO Climatological Normals 1991-2020 — station UCCLE_06447.csv — Official source — https://www.ncei.noaa.gov/data/oceans/archive/arc0216/0253808/1.1/data/0-data/Region-6-WMO-Normals-9120/Belgium/CSV/UCCLE_06447.csv 10. Official cadastral total area by municipality; 2025 superficie totale (ha), converted to km2. — Official source — https://statbel.fgov.be/sites/default/files/files/documents/Bouwen%20%26%20wonen/2.6%20Bodembezetting%20volgens%20het%20Kadasterregister/Occupation%20du%20sol%20selon%20le%20registre%20Cadastral%20sup%20par%20commune.xlsx 11. Official resident population by Belgian municipality on 1 January 2026; Total column. — Official source — https://statbel.fgov.be/sites/default/files/files/documents/bevolking/5.1%20Structuur%20van%20de%20bevolking/Population_par_commune.xlsx ## Cite ImmigrationDB. "Zemst, Belgium." Snapshot approved-static-bb6d69cd3c074ae2, last verified 2026-07-31. https://immigrationdb.com/cities/be/zemst/ 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/be/zemst/ - JSON: https://immigrationdb.com/data/cities/be/zemst.json - Markdown: https://immigrationdb.com/data/cities/be/zemst.md - MCP resource: immigrationdb://city/be/zemst - 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