Gąski [ˈɡɔ̃ski] is a village in the administrative district of Gmina Tarczyn, within Piaseczno County, Masovian Voivodeship, in east-central Poland. It lies approximately 4 kilometres (2 mi) south-east of Tarczyn, 17 km (11 mi) south-west of Piaseczno, and 31 km (19 mi) south of Warsaw.