Oberspreewald-Lausitz is a Kreis (district) in the southern part of Brandenburg, Germany. Area 1217 km², population 142,000 (2001). The district's capital is Senftenberg[?].
The Spree river runs through the district; along its banks there is the Spreewald, a wooded area and habitat of several rare animals. The district is part of the historic region of Lusatia.
Towns in the district: Senftenberg[?], Lübbenau[?], Calau[?], Schwarzheide[?], Großräschen, Lauchhammer[?].