Sadlinki ([saˈdlinki]) (German: Sedlinen) is a village in Kwidzyn County, Pomeranian Voivodeship, in northern Poland. It is the seat of the gmina (administrative district) called Gmina Sadlinki. It lies approximately 9 kilometres (6 mi) south-west of Kwidzyn and 80 km (50 mi) south of the regional capital Gdańsk.