Moscow Oblast, informally known as Podmoskovye is a federal subject of Russia. With a population of 8,524,665 living in an area of 44,300 square kilometers (17,100 sq mi), it is one of the most densely populated regions in the country and is the second most populous federal subject. The oblast has no official administrative center; its public authorities are located in Moscow and Krasnogorsk, and also across other locations in the oblast.