Moscow Oblast (Russian: Моско́вская о́бласть, Moskovskaya oblast) is a federal subject of Russia. It is located in western Russia, and it completely surrounds Moscow. The oblast has no capital, and oblast officials reside in Moscow or in other cities within the oblast. As of 2015, the oblast has a population of 7,231,068 people.
Balashikha is the biggest city in the oblast, with a population of 215,494 people in 2010.