Karczewie [karˈt͡ʂɛvjɛ] (German: Marienau) is a village in the administrative district of Gmina Płoty, within Gryfice County, West Pomeranian Voivodeship, in north-western Poland.

It lies approximately 2 kilometres (1 mi) north-west of Płoty, 12 km (7 mi) south of Gryfice, and 63 km (39 mi) north-east of the regional capital Szczecin.