Moscow metropolitan area

Moscow metropolitan area () or Moscow capital region () is the largest metropolitan area in Russia and Europe, with population of around 20 million. It consists of the city of Moscow and parts of the surrounding Moscow Oblast.
The related terms Moscow region ( - "Moskovsky region") or Moscow and the Oblast () describe of the combined territories of the city of Moscow and the whole of Moscow Oblast. These are used in meteorology, geography, aviation, transport, broadcasting, telecommunications, business, etc. In politics, government, organizations and small business, according to the Constitution of Russia, there are two separated federal subjects of Russia with their governments, parliaments and own law. "De jure" there is no united Moscow region.
Structure and population estimation.
Moscow metropolitan area includes the city of Moscow, population 12,197,596, a ring of cities annexed to it and administered within (Balashikha, Korolyov, Krasnogorsk, Khimki, Mytishchi and Zelenograd), as well as large nearby towns with population of over 100,000 citizens (Reutov, Zheleznodorozhny, Podolsk and Lubertsy, to name a few) that fall under regional administration. Administratively, all those towns are a part of the Moscow Oblast. The metropolitan area has thus no coordinated administration structures, and no official population statistics.
The population of the "Moscow region" is the sum of populations of the city (12,500,123) and surrounding oblast (7,504,339), coming to 20,004,462 – about 13.6% of the entire Russian population.
Economy.
, the Nominal GDP of Moscow metropolitan area was ₽21.6 trillion($800 billion in Purchasing power) and $40,000 per capita(in PPP).