Fleesensee is a lake in the Mecklenburgische Seenplatte district in Mecklenburg-Vorpommern, Germany. At an elevation of 62 metres (203 ft), its surface area is 10.78 square kilometres (4.16 sq mi).The lake is both fed and drained by the Elde river. On its shore, located in a part of the municipality Göhren-Lebbin, there is a large vacation resort that was opened in 2000.