Lubstynek [lupsˈtɨnɛk] is a village in the administrative district of Gmina Lubawa, within Iława County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 9 kilometres (6 mi) north-east of Fijewo (the gmina seat), 23 km (14 mi) east of Iława, and 50 km (31 mi) south-west of the regional capital Olsztyn.

The village was ceded to Poland after the East Prussian plebiscite in 1920.