Gudniki [ɡudˈniki] is a village in the administrative district of Gmina Korsze, within Kętrzyn County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 8 kilometres (5 mi) south of Korsze, 16 km (10 mi) west of Kętrzyn, and 56 km (35 mi) north-east of the regional capital Olsztyn.