Rostov Oblast (Russian: Росто́вская о́бласть, Rostovskaya oblast; ) is a federal subject of Russia (an oblast), located in the Southern Federal District. Rostov Oblast has an area of 100,800 square kilometers (38,900 sq mi) and a population of 4,277,976 (2010 Census), making it the sixth most populous federal subject in Russia. Its administrative center is the city of Rostov-on-Don, which also became the administrative center of the Southern Federal District in 2002.
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