Tandovo (Russian: Тандово) is a lake in Barabinsky District, Novosibirsk Oblast, south-central Russia.

[2] The Sugun Peninsula is a tongue of land projecting into the northern end of the lake from the northeastern shore.

[3] With an area of 87.8 square kilometers (33.9 sq mi) Tandovo is one of the largest lakes in Novosibirsk Oblast.

It is located in the Baraba Lowland, the southern sector of the West Siberian Plain, 33 kilometers (21 mi) SW of Barabinsk.

Its waters freeze in early November and the lake stays under ice until May.