[1] Nizhny Chulym town is located by the northeastern shore of the lake and the small village of Aleksotovo at the southern end.

[2] Sargul lies in the Baraba Lowland, West Siberian Plain.

It belongs to the Chulym river basin, located in the southern part of the Ob-Irtysh interfluve.

The Chulym enters the lake from the northeastern side and flows out from the southwestern end.

[3] It has an hourglass shape roughly aligned from northeast to southwest..[2][4][5] The Bagan flows 17 kilometers (11 mi) to the south.