Studzianna [stuˈd͡ʑanna] is a village in the administrative district of Gmina Poświętne, within Opoczno County, Łódź Voivodeship, in central Poland. It lies approximately 2 kilometres (1 mi) south-west of Poświętne, 17 km (11 mi) north of Opoczno, and 68 km (42 mi) south-east of the regional capital Łódź.