Piaśnik [ˈpʲaɕɲik] is a settlement in the administrative district of Gmina Barlinek, within Myślibórz County, West Pomeranian Voivodeship, in north-western Poland. It lies approximately 8 kilometres (5 mi) south-west of Barlinek, 18 km (11 mi) east of Myślibórz, and 64 km (40 mi) south-east of the regional capital Szczecin.

For the history of the region, see History of Pomerania.