Kozenin [kɔˈzɛnin] is a village in the administrative district of Gmina Sławno, within Opoczno County, Łódź Voivodeship, in central Poland. It lies approximately 4 kilometres (2 mi) south-west of Sławno, 12 km (7 mi) west of Opoczno, and 65 km (40 mi) south-east of the regional capital Łódź.