From the Wikipedia page 
Tomsk Oblast (Russian: То́мская о́бласть, Tomskaya oblast) is a federal subject of Russia (an oblast). It lies in the southeastern West Siberian Plain, in the southwest of the Siberian Federal District. Its administrative center is the city of Tomsk. Population: 1 078 923 (1,047,394 (2010 Census).
The development of the territory which now constitutes the oblast began in the early 17th century. Tomsk itself was founded in 1604. Some of the oblast's 316,900 square kilometers (122,400 sq mi) territory is inaccessible because it is covered with taiga woods and swamps. Tomsk oblast contains Vasyugan Swamp, the biggest swamp in the northern hemisphere. The oblast borders with Krasnoyarsk Krai and Tyumen, Omsk, Novosibirsk, and Kemerovo Oblasts.