Ostrów [ˈɔstruf] is a village in the administrative district of Gmina Magnuszew, within Kozienice County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) south-west of Magnuszew, 24 km (15 mi) north-west of Kozienice, and 58 km (36 mi) south-east of Warsaw.