Duki [ˈduki] is a village in the administrative district of Gmina Tarczyn, within Piaseczno County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) west of Tarczyn, 18 km (11 mi) south-west of Piaseczno, and 30 km (19 mi) south-west of Warsaw.