Jamno is a lake in northern Poland (in West Pomeranian Voivodeship), close to the Baltic Sea. It is divided from the sea by a spit, on which lie the resorts of Mielno and Uniescie.
Jamno covers an area of over 22 square kilometres; its maximum length is 10.1 kilometres and its maximum breadth is 3.4 kilometres. Its greatest depth is 3.9 metres. The lake is popularly used for sailing.
