Płatkownica [pwatkɔvˈnit͡sa] is a village in the administrative district of Gmina Sadowne, within Węgrów County, Masovian Voivodeship, in east-central Poland. It lies approximately 4 kilometres (2 mi) north of Sadowne, 34 km (21 mi) north of Węgrów, and 78 km (48 mi) north-east of Warsaw.