The Zwarte Water is a river in the Dutch province of Overijssel. It is formed just south of the city of Zwolle when two streams, the Soestwetering and the Nieuwe Wetering, merge. The Zwarte Water then flows north through Zwolle, bends to the northeast, takes in the Vecht near Hasselt and flows past the town of Zwartsluis to discharge itself in the Zwarte Meer near Genemuiden.
Contrary to popular belief, the Zwarte Water is not an IJssel branch, nor is it another name for the Vecht. The river is, however, connected to the IJssel by two canals, the Willemsvaart and the Zwolle-IJssel Canal.