Lubnowo [lubˈnɔvɔ] is a village in the administrative district of Gmina Płoskinia, within Braniewo County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 4 kilometres (2 mi) north of Płoskinia, 12 km (7 mi) south-east of Braniewo, and 68 km (42 mi) north-west of the regional capital Olsztyn.

Before 1772 the area was part of Kingdom of Poland, and in 1772–1945 it belonged to Prussia and Germany (East Prussia).