Studzieniec [stuˈd͡ʑɛɲɛt͡s] is a village in the administrative district of Gmina Puszcza Mariańska, within Żyrardów County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) east of Puszcza Mariańska, 9 km (6 mi) south-west of Żyrardów, and 50 km (31 mi) south-west of Warsaw.