Krupia Wólka [ˈkrupja ˈvulka] is a village in the administrative district of Gmina Prażmów, within Piaseczno County, Masovian Voivodeship, in east-central Poland. It lies approximately 7 kilometres (4 mi) north-east of Prażmów, 10 km (6 mi) south of Piaseczno, and 26 km (16 mi) south of Warsaw.