Ostrołęka [ɔstrɔˈwɛŋka] is a village in the administrative district of Gmina Warka, within Grójec County, Masovian Voivodeship, in east-central Poland. It lies approximately 7 kilometres (4 mi) north-east of Warka, 28 km (17 mi) east of Grójec, and 47 km (29 mi) south-east of Warsaw.