Piekielnik [pjɛˈkʲɛlnik] is a village in the administrative district of Gmina Czarny Dunajec, within Nowy Targ County, Lesser Poland Voivodeship, in southern Poland, close to the border with Slovakia. It lies approximately 19 kilometres (12 mi) west of Nowy Targ and 68 km (42 mi) south of the regional capital Kraków.

The village lies in the drainage basin of the Black Sea (through Orava, Váh and Danube rivers), in the historical region of Orava (Polish: Orawa).

The area became part of Poland in the 10th or early 11th century, and later it passed to Hungary. In the late 19th century, Piekielnik had a population of 1,548, with 88.1% of Poles. It became again part of Poland following World War I.