Pistiros Lake (Bulgarian: езеро Пистирос, romanized: ezero Pistiros, IPA: [ˈɛzɛro pisˈtiros]) is the slightly bent southwards rectangular lake, 320 m long in west-east direction and 90 m wide on President Beaches, Byers Peninsula on Livingston Island in the South Shetland Islands, Antarctica. It has a surface area of 2.42 ha, and is separated from the waters of New Plymouth by a 20 to 35 m wide strip of land. The area was visited by early 19th century sealers.

The feature is named after the ancient emporium of Pistiros in Southern Bulgaria.

Pistiros Lake is centred at 62°38′13″S 61°07′59″W / 62.63694°S 61.13306°W / -62.63694; -61.13306 which is 900 m east of Laager Point and 2.08 km south of Ocoa Point. Detailed Spanish mapping in 1992, and Bulgarian mapping in 2009 and 2017.

• Península Byers, Isla Livingston. Mapa topográfico a escala 1:25000. Madrid: Servicio Geográfico del Ejército, 1992
• L. Ivanov. Antarctica: Livingston Island and Greenwich, Robert, Snow and Smith Islands. Scale 1:120000 topographic map. Troyan: Manfred Wörner Foundation, 2010. ISBN 978-954-92032-9-5 (First edition 2009. ISBN 978-954-92032-6-4)
• L. Ivanov. Antarctica: Livingston Island and Smith Island. Scale 1:100000 topographic map. Manfred Wörner Foundation, 2017. ISBN 978-619-90008-3-0
• Antarctic Digital Database (ADD). Scale 1:250000 topographic map of Antarctica. Scientific Committee on Antarctic Research (SCAR). Since 1993, regularly upgraded and updated

• Antarctic lakes
• Livingston Island

• Pistiros Lake. SCAR Composite Gazetteer of Antarctica
• Bulgarian Antarctic Gazetteer. Antarctic Place-names Commission. (details in Bulgarian, basic data in English)
• Management Plan for Antarctic Specially Protected Area No. 126 Byers Peninsula. Measure 4 (2016), ATCM XXXIX Final Report. Santiago, 2016

• Pistiros Lake. Adjusted Copernix satellite image

This article includes information from the Antarctic Place-names Commission of Bulgaria which is used with permission.