Katarzynów [kataˈʐɨnuf] is a village in the administrative district of Gmina Błędów, within Grójec County, Masovian Voivodeship, in east-central Poland. It lies approximately 7 kilometres (4 mi) south-west of Błędów, 22 km (14 mi) south-west of Grójec, and 59 km (37 mi) south-west of Warsaw.