Ostrów is a village in the administrative district of Gmina Radymno, within Jarosław County, Subcarpathian Voivodeship, in south-eastern Poland, close to the border with Ukraine. It lies approximately 4 km (2 mi) north-west of Radymno, 10 km (6 mi) south-east of Jarosław, and 57 km (35 mi) east of the regional capital Rzeszów.