Zagłębie Sosnowiec is a Polish professional football club based in Sosnowiec. The club was established in 1906. It won Polish Cup four times, and also was four times Polish runner up. Apart from football, the organization of Zagłębie has other departments, such as ice-hockey and men's basketball.

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.