The Sluch or Northern Sluch (; ; ; ) is a river in Belarus. Rising in Minsk Oblast, it flows past the cities of Salihorsk and Slutsk, finally emptying into the Pripyat. It is long, and has a drainage basin of .
The (also spelled Morocz or Morach), a right tributary of the Sluch, originates in the . Under Article 2 of the Treaty of Riga (1921), it defined part of the border between Poland and the Soviet Union.