Montemno Lake (Bulgarian: езеро Монтемно, romanized: ezero Montemno, IPA: [ˈɛzɛro monˈtɛmno]) is the 190 m long in southeast–northwest direction and 70 m wide lake on eastern Byers Peninsula, Livingston Island in the South Shetland Islands, Antarctica.

It has a surface area of 0.96 ha and drains northwards into Barclay Bay by way of Bedek Stream.

[1] The feature is named after the ancient Roman road station of Montemno in Northern Bulgaria.

[1] Montemno Lake is situated just west of Urvich Wall and centred at 62°38′41″S 60°58′17″W / 62.64472°S 60.97139°W / -62.64472; -60.97139, which is 230 m northeast of the larger Oread Lake, 3 km northeast of Dometa Point and 3.25 km south of Nedelya Point.

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