Młynek [ˈmwɨnɛk] is a village in the administrative district of Gmina Żarnów, within Opoczno County, Łódź Voivodeship, in central Poland. It lies approximately 9 kilometres (6 mi) south-west of Żarnów, 25 km (16 mi) south-west of Opoczno, and 78 km (48 mi) south-east of the regional capital Łódź.