Abstract: The subject of this research is the peculiarities of social integration of the migrants from the Commonwealth of Independent States (CIS) in Russian border regions. The goal of this work lies in determination of specificity of social integration of the foreign migrants in Russian border regions, as well as the factors of social integration of the migrants in the accepting society. The article provides the results of the studies conducted in 2018 in Russian border regions (Altai Krai, Amur Oblast, Astrakhan Oblast, Volgograd Oblast, Tuva Republic, and Khabarovsk Krai), involving 334 foreign migrants from Uzbekistan, Tajikistan, Kazakhstan, Ukraine, Kirgizia, and other countries. The method of questionnaire was used for collecting information. The scientific novelty of this research consists in the analysis of peculiarities of social integration of the migrants in Russian regions through such indicators, as the acquisition of social norms and values of the local population, as well as the code of conduct, knowledge of history and culture of the accepting society, relationship with the diaspora representatives in the region. The author’s special contribution lies in determination of the absolute and relative factors of social integration of the migrants based on structuring the regression model.