Marianka [maˈrjaŋka] is a village in the administrative district of Gmina Tarczyn, within Piaseczno County, Masovian Voivodeship, in east-central Poland. It lies approximately 4 kilometres (2 mi) west of Tarczyn, 20 km (12 mi) south-west of Piaseczno, and 32 km (20 mi) south-west of Warsaw.