From the Wikipedia page [1]
федера́льный о́круг, Severo-Zapadny federalny okrug [ˈsʲevʲɪrə ˈzapədnɨj fʲɪdʲɪˈralʲnɨj ˈokrʊk]) is one of the eight federal districts of Russia. It consists of the northern part of European Russia. Its population was 13,616,057 (83.5% urban) according to the 2010 Census,[2] living in an area of 1,687,000 square kilometers (651,000 sq mi).
The district comprises the Northern, Northwestern and Kaliningrad economic regions and eleven federal subjects.