Osowo [ɔˈsɔvɔ] is a village in the administrative district of Gmina Karsin, within Kościerzyna County, Pomeranian Voivodeship, in northern Poland. It lies approximately 5 kilometres (3 mi) south-west of Karsin, 28 km (17 mi) south of Kościerzyna, and 74 km (46 mi) south-west of the regional capital Gdańsk.

For details of the history of the region, see History of Pomerania.