Łączno [ˈwɔnt͡ʂnɔ] is a village in the administrative district of Gmina Morąg, within Ostróda County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 5 kilometres (3 mi) north-west of Morąg, 29 km (18 mi) north of Ostróda, and 44 km (27 mi) north-west of the regional capital Olsztyn.