Dębnik [ˈdɛmbnik] is a settlement in the administrative district of Gmina Szemud, within Wejherowo County, Pomeranian Voivodeship, in northern Poland. It lies approximately 4 kilometres (2 mi) south-east of Szemud, 15 km (9 mi) south of Wejherowo, and 27 km (17 mi) north-west of the regional capital Gdańsk.

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