Czosnów [ˈt͡ʂɔsnuf] is a village in Nowy Dwór County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina (administrative district) called Gmina Czosnów. It lies approximately 7 kilometres (4 mi) southeast of Nowy Dwór Mazowiecki and 26 km (16 mi) northwest of Warsaw.