Foreign activity (paradiplomacy) of local governments is one of the elements of Polish foreign policy, changing the traditional approach to foreign policy and diplomacy in our country. Paradiplomacy is an activity that is parallel and complementary to the classic understanding of diplomacy and which is implemented by the government. This paper presents the results of several investigations concerning foreign activity of Polish local and regional governments in the Kaliningrad Region (Oblast). From the geopolitical point of view, the Oblast constitutes for Poland an important region. In particular, the intensive cooperation between the Warmia and Mazury Region (Voivodeship) and the Kaliningrad Region which form the Polish-Russian borderland. Relatively intense relations have been established between the Kaliningrad Region and Pomeranian and Podlaskie Regions (Voivodeships). For the Polish side, the development of this type of relations with Russia, and especially with the Kaliningrad Region, was and still is part of a peaceful transformation of this part of Europe.