Olszyna [ɔlˈʂɨna] is a town in Lubań County, Lower Silesian Voivodeship, in south-western Poland. Its name means "alder wood" in Polish. It is the seat of the administrative district (gmina) called Gmina Olszyna. It received its town charter in 2005.
Prior to 1945 the town was in Germany and known as Langenöls.
It lies approximately 9 kilometres (6 mi) south-east of Lubań, and 116 kilometres (72 mi) west of the regional capital Wrocław. As at 2006, the town has a population of 4,786.
Coordinates: 51°04′00″N 15°23′20″E / 51.06667°N 15.38889°E