Uwieliny [uvjɛˈlinɨ] is a village in the administrative district of Gmina Prażmów, within Piaseczno County, Masovian Voivodeship, in east-central Poland. It lies approximately 9 kilometres (6 mi) north-east of Prażmów, 10 km (6 mi) south of Piaseczno, and 27 km (17 mi) south of Warsaw.