Poloniny National Park is a national park in northeastern Slovakia at the Polish and Ukrainian borders, in the Bukovské vrchy mountain range, which belongs to the Eastern Carpathians. It was created on 1 October 1997 with a protected area of 298.05 km² and a buffer zone of 109.73 km². Selected areas of the park are included into Primeval Beech Forests of the Carpathians UNESCO World Heritage Site.