Sladkovo (Russian: Сладково) is a rural locality (a selo) and the administrative center of Sladkovsky District, Tyumen Oblast, Russia.

Population: 3,303 (2010 Census);[1] 3,477 (2002 Census);[4] 3,651 (1989 Soviet census).

[5] Sladkovo lies in the Ishim Plain, 20 kilometers (12 mi) to the northeast of lake Tavolzhan (Solyonoye), the largest lake in the district.

[6][7]