Prątnik [ˈprɔntnik] is a settlement in the administrative district of Gmina Braniewo, within Braniewo County, Warmian-Masurian Voivodeship, in northern Poland, close to the border with the Kaliningrad Oblast of Russia. It lies approximately 4 kilometres (2 mi) south-west of Braniewo and 78 km (48 mi) north-west of the regional capital Olsztyn.