Dłużec [ˈdwuʐɛt͡s] (German: Langbrück) is a village in the administrative district of Gmina Węgorzewo, within Węgorzewo County, Warmian-Masurian Voivodeship, in northern Poland, close to the border with the Kaliningrad Oblast of Russia. It lies approximately 16 kilometres (10 mi) south-west of Węgorzewo and 80 km (50 mi) north-east of the regional capital Olsztyn.

The village has a population of 180.