Koziołek [kɔˈʑɔwɛk] is a village in the administrative district of Gmina Grabów nad Pilicą, within Kozienice County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) south-east of Grabów nad Pilicą, 25 km (16 mi) north-west of Kozienice, and 61 km (38 mi) south of Warsaw.