Ostrownica [ɔstrɔvˈnit͡sa] is a village in the administrative district of Gmina Kazanów, within Zwoleń County, Masovian Voivodeship, in east-central Poland.

[1] It lies approximately 15 kilometres (9 mi) south-west of Zwoleń and 112 km (70 mi) south of Warsaw.

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