Osieczno [ɔˈɕɛt͡ʂnɔ] is a village in the administrative district of Gmina Widawa, within Łask County, Łódź Voivodeship, in central Poland. It is located approximately 8 kilometres (5 mi) south-west of Widawa, 29 km (18 mi) south-west of Łask, and 61 km (38 mi) south-west of the regional capital Łódź.