Tyumen Oblast (Russian: Тюме́нская о́бласть, Tyumenskaya oblast) is a federal subject of Russia (an oblast). Its administrative center is the city of Tyumen. The oblast has administrative jurisdiction over two autonomous okrugs—Khanty–Mansi Autonomous Okrug and Yamalo-Nenets Autonomous Okrug. Tyumen is the largest city, with over half a million inhabitants. As of 2006, it is by far the richest federal subject of Russia, with an average GDP per capita several times the national average.