Grabianka [ɡraˈbjanka] is a village in the administrative district of Gmina Osieck, within Otwock County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) east of Osieck, 21 km (13 mi) south-east of Otwock, and 42 km (26 mi) in south-east of Warsaw.