Sobno [ˈsɔbnɔ] is a village in the administrative district of Gmina Łukta, within Ostróda County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 6 kilometres (4 mi) north-east of Łukta, 20 km (12 mi) north-east of Ostróda, and 27 km (17 mi) west of the regional capital Olsztyn.