Sladkovsky District is an administrative district (raion), one of the twenty-two in Tyumen Oblast, Russia. As a municipal division, it is incorporated as Sladkovsky Municipal District. It is located in the southeast of the oblast and borders with Abatsky District in the north, Omsk Oblast in the east, Kazakhstan in the south, Kazansky District in the west, and with Ishimsky District in the northwest. The area of the district is 4,023 square kilometers (1,553 sq mi). Its administrative center is the rural locality of Sladkovo. Population: 12,264 ; 15,052 (2002 census); 17,750 (1989 Soviet census). The population of Sladkovo accounts for 26.9% of the district's total population.