Księżno [ˈkɕɛ̃ʐnɔ] is a village in the administrative district of Gmina Wilczęta, within Braniewo County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 6 kilometres (4 mi) north-west of Wilczęta, 21 km (13 mi) south of Braniewo, and 63 km (39 mi) north-west of the regional capital Olsztyn.