Lubian [ˈlubjan] (German: Groß Lauben) is a village in the administrative district of Gmina Grunwald, within Ostróda County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 10 kilometres (6 mi) south-east of Gierzwałd (the gmina seat), 28 km (17 mi) south-east of Ostróda, and 40 km (25 mi) south-west of the regional capital Olsztyn.