Ostrów [ˈɔstruf] is a village in the administrative district of Gmina Maciejowice, within Garwolin County, Masovian Voivodeship, in east-central Poland. It lies approximately 11 kilometres (7 mi) north-west of Maciejowice, 21 km (13 mi) south-west of Garwolin, and 60 km (37 mi) south-east of Warsaw.