 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.Omsk Oblast shares borders with Kazakhstan (North Kazakhstan Region and Pavlodar Region) to the south, Tyumen Oblast in the west and Novosibirsk Oblast and Tomsk Oblast in the east.