Seaside Regional Park (Lithuanian: Pajūrio regioninis parkas) is a regional park located on the coast of the Baltic Sea in Western Lithuania. 54% of its 5602 ha is sea and 36% forest. The administration offices are in Karklė. The park was founded in order to preserve the continental coastal landscapes/seascapes, the natural and cultural heritage properties, the biological diversity of the Baltic Sea, and the marine boulder beds.