Manasterz [maˈnastɛʂ] is a village in the administrative district of Gmina Jawornik Polski, within Przeworsk County, Subcarpathian Voivodeship, in south-eastern Poland. It lies approximately 10 kilometres (6 mi) north-east of Jawornik Polski, 17 km (11 mi) south-west of Przeworsk, and 28 km (17 mi) east of the regional capital Rzeszów.