Dziarnów [ˈd͡ʑarnuf] is a village in the administrative district of Gmina Mogielnica, within Grójec County, Masovian Voivodeship, in east-central Poland. It lies approximately 4 kilometres (2 mi) south-east of Mogielnica, 24 km (15 mi) south of Grójec, and 64 km (40 mi) south of Warsaw.