Marynin [maˈrɨnin] is a village in the administrative district of Gmina Chynów, within Grójec County, Masovian Voivodeship, in east-central Poland. It lies approximately 9 kilometres (6 mi) east of Chynów, 23 km (14 mi) east of Grójec, and 41 km (25 mi) south of Warsaw.