Based on the data obtained during a ёeld survey in June 2015, the article focuses on a number of socio-political problems the city of Sevastopol faced after its accession to the Russian Federation. The author provides examples of the difёculties that arose in the process of Sevastopol citizens’ adaptation to a new institutional environment. These are the problems of split in managerial elite, party system instability, local self-government disruption, rejection of a set of educational innovations by the pedagogical community, entrepreneurs’ discontent, etc. At the same time the article shows that a key feature of Sevastopol was not affected in the course of adaptation, the feature being a strong corporate spirit and values resulting from pride for the city’s heroic history. Thus, reuniёcation of Sevastopol with Russia led to signiёcant institutional changes, which caused some socio-economic difёculties, but all these transformations did not affect the value system of Sevastopol, and they even strengthened it in fact. So, there is every reason to believe that adaptation difёculties will be overcome, and, the policy being reasonable, further development of Sevastopol can be quite successful.