Michalczew [miˈxalt͡ʂɛf] is a village in the administrative district of Gmina Warka, within Grójec County, Masovian Voivodeship, in east-central Poland. It lies approximately 9 kilometres (6 mi) north-west of Warka, 17 km (11 mi) east of Grójec, and 44 km (27 mi) south of Warsaw.