Lake Werbellin is a lake in the Barnim district of Brandenburg, Germany. It is located south of Joachimsthal in the Schorfheide-Chorin Biosphere Reserve. The southern shore belongs to the Schorfheide municipality. With a surface area of 7.82 square kilometers (3.02 sq mi) it is the fourth largest lake in Brandenburg and with 51 meters (167 ft) the second deepest.