Tula Oblast (Russian: Ту́льская о́бласть, Tulskaya oblast) is a federal subject of Russia (an oblast) with its present borders formed on September 26, 1937. Its administrative center is the city of Tula. The oblast has an area of 25,700 square kilometers (9,900 sq mi)[citation needed] and a population of 1,553,925 (2010 Census preliminary results). The current governor of the oblast is Vladimir Gruzdev.