Opitsvet Lake (Bulgarian: езеро Опицвет, romanized: ezero Opitsvet, IPA: [ˈɛzɛro oˈpit͡svɛt]) is the lake extending 420 m in west–east direction and 410 m in north–south direction on the southeast coast of Rozhen Peninsula, Livingston Island in the South Shetland Islands, Antarctica. It has a surface area of 11 ha and is separated from the waters of Brunow Bay on the east and Bransfield Strait on the south by a 70 to 150 m wide strip of land. The area was visited by early 19th century sealers.

The feature is named after the settlement of Opitsvet and the eponymous marsh in Western Bulgaria.

Opitsvet Lake is situated at the base of Samuel Point and centred at 62°43′37″S 60°09′12″W / 62.72694°S 60.15333°W / -62.72694; -60.15333, which is 600 m east of Needle Peak and 2.78 km southwest of Vazov Point. Bulgarian mapping of the area in 2009 and 2017.

• L. Ivanov. Antarctica: Livingston Island and Greenwich, Robert, Snow and Smith Islands. Scale 1:120000 topographic map. Troyan: Manfred Wörner Foundation, 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

• Opitsvet Lake. SCAR Composite Gazetteer of Antarctica
• Bulgarian Antarctic Gazetteer. Antarctic Place-names Commission. (details in Bulgarian, basic data in English)

• Opitsvet Lake. Adjusted Copernix satellite image

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