--- entity_id: city:pl:slug:koscian entity_type: city name: "Kościan" country_code: PL country: Poland slug: koscian canonical_url: https://immigrationdb.com/cities/pl/koscian/ json_url: https://immigrationdb.com/data/cities/pl/koscian.json markdown_url: https://immigrationdb.com/data/cities/pl/koscian.md mcp_uri: immigrationdb://city/pl/koscian snapshot_id: approved-static-bb6d69cd3c074ae2 generated_at: 2026-08-04 last_verified: 2026-08-01 fact_count: 11 metric_dictionary_url: https://immigrationdb.com/data/metrics.json license_url: https://immigrationdb.com/about/copyright/ --- # Kościan Kościan had 23,110 residents at the end of 2024 and is a city in Poland. The unemployment rate was 2.3% at the end of 2025. For Kościan, annual PM2.5 was 17 µg/m³ at the end of 2024. The foreign population count was 46 in March 2021. ## Population The city covered 9 km² in 2024. Population density was 2,568 people per km² in 2024. ## Facts | Metric | metric_id | Value | Scope | Observed | Verified | Freshness | Lane | Source | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Foreign residents | `foreign_population_total` | 46 people | city | 2021-03-31 | 2026-07-15 | stale | verified | [1] | | Population | `population_total` | 23,110 people | gmina | 2024-12-31 | 2026-07-14 | stale | verified | [2] | | Unemployment rate | `unemployment_total_percent` | 2.3 % | city | 2025-12-31 | 2026-07-27 | aging | verified | [3] | | PM10 — annual mean | `air_quality_pm10_annual_ug_m3` | 24 µg/m³ | nearest_station | 2024-12-31 | 2026-08-01 | stale | verified | [4] | | PM2.5 — annual mean | `air_quality_pm25_annual_ug_m3` | 17 µg/m³ | city | 2024-12-31 | 2026-07-29 | stale | verified | [5] | | Average daytime high by month | `climate_monthly_high_c` | Jan 2.1 · Feb 3.7 · Mar 8.1 · Apr 15 · May 19.8 · Jun 23.1 · Jul 25.2 · Aug 24.9 · Sep 19.5 · Oct 13.3 · Nov 7.1 · Dec 3.2 °C | nearest_station | 1991-12-31 | 2026-07-31 | stale | verified | [6] | | Average night-time low by month | `climate_monthly_low_c` | Jan -2.9 · Feb -2.4 · Mar 0 · Apr 4 · May 8.4 · Jun 11.9 · Jul 14.1 · Aug 13.7 · Sep 9.6 · Oct 5.4 · Nov 1.8 · Dec -1.4 °C | nearest_station | 1991-12-31 | 2026-07-31 | stale | verified | [6] | | Average temperature by month | `climate_monthly_mean_c` | Jan -0.4 · Feb 0.5 · Mar 3.8 · Apr 9.5 · May 14.1 · Jun 17.5 · Jul 19.5 · Aug 19.1 · Sep 14.3 · Oct 9.1 · Nov 4.4 · Dec 0.9 °C | nearest_station | 1991-12-31 | 2026-07-31 | stale | verified | [6] | | Average precipitation by month | `climate_monthly_precip_mm` | Jan 37.7 · Feb 30.7 · Mar 39.9 · Apr 28.6 · May 53.8 · Jun 57.5 · Jul 84.4 · Aug 55.9 · Sep 41.2 · Oct 35.4 · Nov 33.6 · Dec 40.1 mm | nearest_station | 1991-12-31 | 2026-07-31 | stale | verified | [6] | | City area | `city_area_km2` | 9 km2 | city | 2024-12-31 | 2026-07-15 | stale | verified | [7] | | Population density | `population_density_per_km2` | 2,568 people/km² | city | 2024-12-31 | 2026-07-15 | 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. GUS BDL / NSP 2021 non-Polish citizenship variable 1653367 — Official source — https://bdl.stat.gov.pl/api/v1/data/by-unit/{teryt_gmina}?var-id=1653367&year=2021 2. source-2ec73877f6eb — Official source — https://bdl.stat.gov.pl/api/v1/data/by-unit/023015911011?var-id=72305&year=2024 3. Local Data Bank — Share of registered unemployed persons in the working-age population by sex, total, 2025 — Official source — https://bdl.stat.gov.pl/api/v1/data/by-variable/79214?lang=en&unit-level=6&year=2025 4. EEA air quality statistics — PL PM10 annual mean 2024 (station Kościan, ul. Maya) — Official source — https://air.discomap.eea.europa.eu/arcgis/rest/services/AirQuality/AQ_Statistics_WM/MapServer/0/query?where=Country_ISO%3D'PL'%20AND%20AirPollutant%3D'PM10'%20AND%20YearOfStatistics%3D2024&outFields=AirPollutant,AirPollutionLevel,Country_ISO,StationName,YearOfStatistics,UnitOfAirpollutionLevel,ReportingMetric,LatitudeOfMeasurementStation,LongitudeOfMeasurementStation,DataCoverage,Preliminary&returnGeometry=false&f=json 5. EEA Air Quality Annual Statistics — Poland 2024 PM2.5 station data — Official source — https://air.discomap.eea.europa.eu/arcgis/rest/services/AirQuality/AQ_Statistics_WM/MapServer/0/query?where=AirPollutant%3D%27PM2.5%27+AND+Country_ISO%3D%27PL%27+AND+YearOfStatistics%3D2024&outFields=AirPollutant%2CAirPollutionLevel%2CCountry_ISO%2CStationName%2CAreaOfMeasurementStation%2CYearOfStatistics%2CUnitOfAirpollutionLevel%2CTypeOfMeasurementStation%2CDataCoverage%2CReportingMetric%2CLatitudeOfMeasurementStation%2CLongitudeOfMeasurementStation&returnGeometry=false&resultRecordCount=1000&resultOffset=0&f=json 6. WMO Climatological Normals 1991-2020 — station Poznan — Official source — https://www.ncei.noaa.gov/data/oceans/archive/arc0216/0253808/1.1/data/0-data/Region-6-WMO-Normals-9120/Poland/CSV/Poznan_12330.csv 7. GUS BDL / GUGiK area variable 2018 — Official source — https://bdl.stat.gov.pl/api/v1/data/by-unit/{teryt_gmina}?var-id=2018&year=2024 8. Reproducible gmina density for Kościan: population_total_2024 / official area_2024, rounded to the metric contract precision 0. — Official source — https://bdl.stat.gov.pl/api/v1/data/by-unit/023015911011?var-id=2018&var-id=72305&year=2024 ## Cite ImmigrationDB. "Kościan, Poland." Snapshot approved-static-bb6d69cd3c074ae2, last verified 2026-08-01. https://immigrationdb.com/cities/pl/koscian/ 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/pl/koscian/ - JSON: https://immigrationdb.com/data/cities/pl/koscian.json - Markdown: https://immigrationdb.com/data/cities/pl/koscian.md - MCP resource: immigrationdb://city/pl/koscian - 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