Karolin [kaˈrɔlin] is a village in the administrative district of Gmina Promna, within Białobrzegi County, Masovian Voivodeship, in east-central Poland. It lies approximately 8 kilometres (5 mi) north of Promna, 12 km (7 mi) north of Białobrzegi, and 52 km (32 mi) south of Warsaw.