Siennów [ˈɕɛnːuf] is a village in the administrative district of Gmina Zarzecze, within Przeworsk County, Subcarpathian Voivodeship, in south-eastern Poland. It lies approximately 4 kilometres (2 mi) south-west of Zarzecze, 12 km (7 mi) south of Przeworsk, and 37 km (23 mi) east of the regional capital Rzeszów.