Lembruk
 Lembruk [ˈlɛmbruk] (German: Langenbrück) is a village in the administrative district of Gmina Mrągowo within Mrągowo County Warmian-Masurian Voivodeship in northern Poland. It lies approximately 11 kilometres (7 mi) north of Mrągowo and 53 km (33 mi) east of the regional capital Olsztyn.Before 1945 the area was part of Germany (East Prussia).The village has a population of 230.