Märkische Schweiz Nature Park is a nature park and reserve in the district of Märkisch-Oderland, in Brandenburg, Germany. It covers an area of 204 km² (79 sq mi). It was established on October 1, 1990, and is located east of Berlin.

The park's main river is the Stobber. With a surface area of 1.37 km² the Schermützelsee is its largest lake.

52°34′27″N 14°05′07″E / 52.5741527778°N 14.0852777778°E / 52.5741527778; 14.0852777778