Mosiny is a village in the administrative district of Gmina Człuchów, within Człuchów County, Pomeranian Voivodeship, in northern Poland. It lies approximately 7 km south of Człuchów and 121 km south-west of the regional capital Gdańsk. It is located within the historic region of Pomerania. Mosiny was a royal village of the Polish Crown, administratively located in the Człuchów County in the Pomeranian Voivodeship.