Osiek [ˈɔɕɛk] is a village in the administrative district of Gmina Galewice, within Wieruszów County, Łódź Voivodeship, in central Poland. It lies approximately 5 kilometres (3 mi) north-west of Galewice, 9 km (6 mi) north-east of Wieruszów, and 99 km (62 mi) south-west of the regional capital Łódź.