Omsk Region is situated to the south-west of West-Siberian low-lands and occupies the territory of 140 thousand square kilometers (54 thousand square miles). The territory of the region includes 32 administrative districts. The northern part of the Region is a forest-taiga zone. Forest-steppe with fertile black earth soil stretches to the south. Irtish, the largest tributary of the river Ob, flows south -north of the region and is navigable throughout the territory.

The climate of the region is continental - with warm and sunny summer, frosty and snowy winter. Average temperature in January is -21C (-6F), in July +19C (+66F). Absolute temperature maximum in Omsk was +40C (+104F), absolute minimum -49C (-56F). Annual precipitation varies between 200mm and 400mm.

There are six cities in the region: Omsk, Isilkul, Kalachinsk, Nazyvaevsk, Tara and Tukalinsk. In early 1994, the urban population predominates in the region, the majority (about a million people) being concentrated in Omsk.