Dwernik [ˈdvɛrɲik] is a village in the administrative district of Gmina Lutowiska, within Bieszczady County, Subcarpathian Voivodeship, in south-eastern Poland, close to the border with Ukraine. It lies approximately 8 kilometres (5 mi) south-west of Lutowiska, 26 km (16 mi) south of Ustrzyki Dolne, and 102 km (63 mi) south-east of the regional capital Rzeszów.