In the regional policy of Lithuania the Curonian lagoon coastal region is not distinguished as a separate territorial unit. Nevertheless, this territory is being analyzed in different regional context. Accoding to the samples of the EU regional policy, the authors of this article provided an assumption that the principles of solidarity and cohesion could be successfully implemented in the regional policy if the financial support will be allocated not for counties (regions) but according to specific problems in the regions on mezo and micro levels. The sample of that micro region can be recognized as the Curonian lagoon region (Lithuanian part).