Limnopolar Lake is one of the numerous freshwater lakes on the ice-free Byers Peninsula, Livingston Island in the South Shetland Islands, Antarctica. The feature is oval in shape, extending 175 m in southeast-northwest direction and 140 m in southwest-northeast direction. It drains through a 2.7 km stream westwards into Osogovo Bay north of Point Smellie.
The lake's name derives from the extensive limnological research in the area carried out by the Spanish Antarctic programme.
Limnopolar Lake is centred at -62.6483°N -61.1052°W which is 900 m southwest of Usnea Plug, 2.23 km northeast of Wasp Hill and 2.58 km southeast of Laager Point. British mapping in 1968, detailed Spanish mapping in 1992, and Bulgarian mapping in 2005, 2009 and 2017.
