Posmykowizna [pɔsmɨkɔˈvizna] is a village in the administrative district of Gmina Działoszyn, within Pajęczno County, Łódź Voivodeship, in central Poland. It lies approximately 2 kilometres (1 mi) north-east of Działoszyn, 8 km (5 mi) west of Pajęczno, and 84 km (52 mi) south-west of the regional capital Łódź.