Kozin [ˈkɔʑin] is a village in the administrative district of Gmina Krasne, within Przasnysz County, Masovian Voivodeship, in east-central Poland. It lies approximately 4 kilometres (2 mi) west of Krasne, 12 km (7 mi) south of Przasnysz, and 78 km (48 mi) north of Warsaw.