Kyritz (German pronunciation: [ˈkyːʁɪts]) is a town in the Ostprignitz-Ruppin district, in Brandenburg, Germany.

The noise of numerous water mills along a stream parallel to the river Jäglitz was the reason for this nickname.

The town includes the districts Berlitt, Bork, Drewen, Gantikow, Ganz, Holzhausen, Kötzlin, Lellichow, Mechow, Rehfeld and Teetz.

The merchants living in Kyritz sold wheat, clothes, wood, wool, linnen and hop to other member towns of the Hanseatic League and they bought metals, spices, wine and fish from other places.

The beer was named "Mord und Totschlag" (Murder and Manslaughter) and it is still brewed in Neuzelle.

In 1600 Count Hans Christoff von Königsmarck was born in Kötzlin, a leading Swedish general in the Thirty Years' War who is most famous for attempting to conquer Prague in 1648.

At the end of Mauerstraße a half round defensive tower was transformed into a residential building, a house of this kind is called "Wiekhaus" in German.