Tyumen Oblast is a federal subject of Russia. It is located in Western Siberia, and is administratively part of the Urals Federal District. The oblast has administrative jurisdiction over two autonomous okrugs: Khanty-Mansi Autonomous Okrug and Yamalo-Nenets Autonomous Okrug. Tyumen Oblast, including its autonomous okrugs, is the third-largest federal subject by area, and has a population of 3,395,755 (2010).