Аннотация:In this chapter, we aim to demonstrate how the trends, scales, and factors of long-term migration in the CIS countries have changed over time. After the collapse of the USSR, its territory became an arena of mass migrations, which were initially caused by economic and political shocks. In the late 1990s, significant economic and demographic differences between the region’s main donor and recipient countries became evident. A regional migration system has been formed and exists in the CIS, with the main center in Russia and a second center in Kazakhstan. Relations between the majority of other states that made up the former USSR are relatively weak. A year-long outflow of the Russian-speaking population from the states of Transcaucasia and Central Asia, as well as migration among the representatives of the titular nations of these countries to Russia and Kazakhstan have noticeably changed the population structure, both in donor and recipient countries. A significant part of the flow from the states of the European part of the CIS has been reoriented toward countries outside the former USSR.