Lusajny [luˈsai̯nɨ] is a village in the administrative district of Gmina Łukta, within Ostróda County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 8 kilometres (5 mi) north-east of Łukta, 22 km (14 mi) north-east of Ostróda, and 25 km (16 mi) west of the regional capital Olsztyn.