Kolomna is a historical city in Moscow Oblast, Russia, situated at the confluence of the Moskva and Oka Rivers, 114 kilometers (71 mi) southeast of Moscow. Population: 144,589 (2010 Russian census); 150,129 (2002 Census); 161,881 (1989 Soviet census).

Moscow Oblast 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.