Karolin [kaˈrɔlin] is a village in the administrative district of Gmina Obrzycko, within Szamotuły County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 6 kilometres (4 mi) south of Obrzycko, 8 km (5 mi) north-west of Szamotuły, and 40 km (25 mi) north-west of the regional capital Poznań.