Sosnowiec is an industrial city county in the Dąbrowa Basin of southern Poland, in the Silesian Voivodeship, which is also part of the Metropolis GZM municipal association. Located in the eastern part of the Upper Silesian Industrial Region, Sosnowiec is one of the cities of the Katowice urban area, which is a conurbation with the overall population of 2.7 million people; as well as the greater Upper Silesian-Moravian metropolitan area populated by about 5.3 million people. The population of the city is 189,178 as of December 2022.

The Dąbrowa Basin or Zagłębie Dąbrowskie is a geographical and historical region in southern Poland. It forms western part of Lesser Poland, though it shares some cultural and historical features with the neighbouring Upper Silesia. The region is sometimes referred to in English as Zaglembie or Zaglembia, especially in Jewish publications written in the English language.