Where is the largest part of the population of Russia concentrated?

In Russia, an example of 8.5 people come to one square kilometer. The most densely populated region is Moscow with a population of over 12 million 300 thousand people. By simple calculations, one can deduce that there are 4910 people per square kilometer in the city of Moscow.
Next in terms of density is the city of St. Petersburg, where about 3724 people live on one square kilometer. It is followed by the city of Sevastopol. There is one square kilometer for 481 people.