Rudnia [ˈrudɲa] (German Rohden) is a village in the administrative district of Gmina Zalewo, within Iława County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 6 kilometres (4 mi) south of Zalewo, 23 km (14 mi) north of Iława, and 58 km (36 mi) west of the regional capital Olsztyn.