Oleszna [ɔˈlɛʂna] is a village in the administrative district of Gmina Łagiewniki, within Dzierżoniów County, Lower Silesian Voivodeship, in south-western Poland. Prior to 1945 it was in Germany. It lies approximately 3 kilometres (2 mi) north-west of Łagiewniki, 21 km (13 mi) north-east of Dzierżoniów, and 40 km (25 mi) south-west of the regional capital Wrocław.