Ust-Ishimsky District
Ust-Ishimsky District () is an administrative and municipal district (raion), one of the thirty-two in Omsk Oblast, Russia. It is located in the northwest of the oblast. The area of the district is .} Its administrative center is the rural locality (a selo) of Ust-Ishim, which, as its name indicates, is located at the confluence of the Ishim River with the Irtysh. Population: 13,480 (2010 Census);  The population of Ust-Ishim accounts for 35.6% of the district's total population. The Ust'-Ishim man, an ancient skeleton dated to 45,000 years before present, was discovered on the bank of the Irtysh River in Ust-Ishimsky District. Notable residents 

Vilis Krištopans (born 1954), Latvian politician, Prime Minister of Latvia 1998–1999

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Districts of Omsk Oblast