Zabłotnia [zaˈbwɔtɲa] is a village in the administrative district of Gmina Grodzisk Mazowiecki, within Grodzisk Mazowiecki County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) north-west of Grodzisk Mazowiecki and 31 km (19 mi) west of Warsaw.