Sarna [ˈsarna] is a village in the administrative district of Gmina Małdyty, within Ostróda County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 5 kilometres (3 mi) north of Małdyty, 32 km (20 mi) north-west of Ostróda, and 53 km (33 mi) west of the regional capital Olsztyn.