Jakubowizna [jakubɔˈvizna] is a village in the administrative district of Gmina Chynów, within Grójec County, Masovian Voivodeship, in east-central Poland. It lies approximately 2 kilometres (1 mi) east of Chynów, 17 km (11 mi) east of Grójec, and 36 km (22 mi) south of Warsaw.