Kaplin [ˈkaplin] is a village in the administrative district of Gmina Mogielnica, within Grójec County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) north-east of Mogielnica, 21 km (13 mi) south-west of Grójec, and 60 km (37 mi) south of Warsaw.