Przemsza (German: Przemsa) is a river in the south of Poland, a tributary of the Vistula. According to one theory, it originates at the confluence of the Black (Polish: Czarna) Przemsza and White (Biała) Przemsza, between the cities of Mysłowice and Jaworzno. For about 24 km (15 mi) it flows southwards to its Vistula mouth at Czarnuchowice (a district of Bierun).