Piotrkowo [pjɔtrˈkɔvɔ] is a village in the administrative district of Gmina Janowiec Kościelny, within Nidzica County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 4 kilometres (2 mi) south-east of Janowiec Kościelny, 14 km (9 mi) south-east of Nidzica, and 58 km (36 mi) south of the regional capital Olsztyn.