Karsino (Polish pronunciation: [karˈɕinɔ]; formerly German: Karzin) is a village in the administrative district of Gmina Postomino, within Sławno County, West Pomeranian Voivodeship, in north-western Poland. It lies approximately 11 kilometres (7 mi) west of Postomino, 14 km (9 mi) north-west of Sławno, and 175 km (109 mi) north-east of the regional capital Szczecin.

The village has a population of 103.