Bieruń [ˈbʲɛruɲ] (German: Berun) is a town in Upper Silesia, in southern Poland, about 25 km (16 mi) south of Katowice. The town belongs to the Silesian Voivodeship since its formation in 1999, previously to Katowice Voivodeship and, before World War II, was part of the Polish Autonomous Silesian Voivodeship.