Kazuń-Bielany [ˈkazuɲ bjɛˈlanɨ] is a village in the administrative district of Gmina Czosnów, within Nowy Dwór County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) north-west of Czosnów, 3 km (2 mi) south of Nowy Dwór Mazowiecki, and 31 km (19 mi) north-west of Warsaw.