At the present stage of social development in Europe and Russia, studies analyzing and evaluating ethnic and national borders are of increasing relevance. Over the last three decades, the state borders in the Baltic region have been stable, which is not the case in Europe in general. The author believes that the key reason behind the current crisis in Russia-EU relations is the conspicuous neglect of Russian interests in the neighboring countries that formed after the disintegration of the USSR. However, escalation of the conflict was historically and geographically predetermined. The political borders of post-Soviet states do not coincide with the ethnic ones and, therefore, the attempts to consolidate states through ethnic mobilization meet corresponding resistance from groups with a different identity. In the Baltic region, these processes have not reached the Ukrainian scale; however, there are prerequisites for ethno-political conflicts of this type. The post-Crimean political debate in the Baltic states