Pleśno [ˈplɛɕnɔ] is a village in the administrative district of Gmina Bisztynek, within Bartoszyce County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 12 kilometres (7 mi) north-east of Bisztynek, 23 km (14 mi) south-east of Bartoszyce, and 52 km (32 mi) north-east of the regional capital Olsztyn.