Lubień (Polish pronunciation: [ˈlubjɛj̃]) is a settlement in the administrative district of Gmina Miłomłyn, within Ostróda County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 4 kilometres (2 mi) south of Miłomłyn, 9 km (6 mi) north-west of Ostróda, and 44 km (27 mi) west of the regional capital Olsztyn.