Prace Duże [ˈprat͡sɛ ˈduʐɛ] is a village in the administrative district of Gmina Tarczyn, within Piaseczno County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) east of Tarczyn, 14 km (9 mi) south-west of Piaseczno, and 29 km (18 mi) south of Warsaw.