Kosny [ˈkɔsnɨ] is a village in the administrative district of Gmina Głowaczów, within Kozienice County, Masovian Voivodeship, in east-central Poland. It lies approximately 6 kilometres (4 mi) west of Głowaczów, 24 km (15 mi) west of Kozienice, and 69 km (43 mi) south of Warsaw.