Kosin [ˈkɔɕin] is a village in the administrative district of Gmina Czaplinek, within Drawsko County, West Pomeranian Voivodeship, in north-western Poland. It lies approximately 12 kilometres (7 mi) south-east of Czaplinek, 38 km (24 mi) east of Drawsko Pomorskie, and 118 km (73 mi) east of the regional capital Szczecin.

Between 1871 and 1945 the area was part of Germany.