The "Naturschutzgebiet Linowsee-Dutzendsee" is a Naturschutzgebiet (protected area) and Natura 2000-area in the districts Oder-Spree and Dahme-Spreewald in Brandenburg, Germany. The area covers about 60 hectare and is situated in the Dahme-Heideseen Nature Park. Central parts of the area are the very shallow lake Linowsee and the terrestrialisation mire of the former Dutzendsee.