Ostr na is a village in the administrative district of Gmina Przeworno, within Strzelin County, Lower Silesian Voivodeship, in south-western Poland. Prior to 1945 it was in Germany. It lies approximately 7 kilometres (4 mi) east of Przeworno, 13 km (8 mi) south of Strzelin, and 51 km (32 mi) south of the regional capital Wroc aw. Gmina Przeworno is a rural gmina (administrative district) in Strzelin County, Lower Silesian Voivodeship, in south-western Poland. Its seat is the village of Przeworno, which lies approximately 12 kilometres (7 mi) south of Strzelin, and 50 kilometres (31 mi) south of the regional capital Wroc aw.