Osetno [ɔˈsɛtnɔ] is a village in the administrative district of Gmina Biskupiec, within Nowe Miasto County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 8 kilometres (5 mi) south of Biskupiec, 18 km (11 mi) west of Nowe Miasto Lubawskie, and 88 km (55 mi) south-west of the regional capital Olsztyn.