 omsk oblast (, omskaya oblast) is a federal subject of russia (an oblast), located in southwestern siberia. the oblast has an area of . its population is 1,977,665 (2010 census) with the majority, 1.15 million, living in omsk, the administrative center. the oblast borders with tyumen oblast in the north and west, novosibirsk and tomsk oblasts in the east, and with kazakhstan in the south. ==history== ===prehistory and the middle ages=== archeological findings indicate that the present day territory of the oblast has been inhabited for the last 14,000 years. neolithic societies in the area lived by fishing and hunting. about three thousand years ago, pastoralism began to take hold. various turkic states dominated the area throughout the medieval era. the most notable of these were the western turkic khaganate and the siberian khanate. siberian tatars, mongols, khanty and mansi tribes, along with others, inhabited the territory. ===exploration of siberia=== the russian history of omsk began with the 1584 arrival of a cossack force under
Omsk_Oblast States_and_territories_established_in_1934