Koziczyn [kɔˈʑit͡ʂɨn] is a village in the administrative district of Gmina Regimin, within Ciechanów County, Masovian Voivodeship, in east-central Poland. It lies approximately 10 kilometres (6 mi) north-east of Regimin, 14 km (9 mi) north of Ciechanów, and 88 km (55 mi) north of Warsaw.