Olszewki [ɔlˈʂɛfki] (German: Olschöwken; 1938-45: Kornau) is a village in the administrative district of Gmina Dźwierzuty, within Szczytno County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 5 kilometres (3 mi) south-east of Dźwierzuty, 14 km (9 mi) north of Szczytno, and 34 km (21 mi) east of the regional capital Olsztyn.