Wólka Kosowska is a village in the administrative district of Gmina Lesznowola, within Piaseczno County, Masovian Voivodeship, in east-central Poland. It lies approximately 8 kilometres south-west of Lesznowola, 12 km west of Piaseczno, and 21 km south-west of Warsaw. Wólka Kosowska has many Asian businesses.