Pietrzwałd [ˈpjɛtʂfau̯t] is a village in the administrative district of Gmina Ostróda, within Ostróda County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 14 kilometres (9 mi) south of Ostróda and 45 km (28 mi) south-west of the regional capital Olsztyn.