Piersławek is a village in the administrative district of Gmina Piecki, within Mrągowo County, Warmian-Masurian Voivodeship, in northeastern Poland.

Lake Wągiel (German: Wongel) lies north of Piersławek, and the source of the Dajna River is found nearby.

Prior to the late Middle Ages, the region was inhabited by the Old Prussians, an extinct Baltic people related linguistically to the Lithuanians.

The village was occupied by the Red Army in late January 1945 during the Soviet conquest of East Prussia, and remaining German inhabitants who had not been killed or fled were eventually expelled and replaced by Polish settlers.

A room in the house, which survived the war, has been dedicated to the memory of Wiechert, some of whose numerous works have been translated into Polish and English.