Guja [ˈɡuja] (German Gross Guja) 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 12 kilometres (7 mi) north-west of Węgorzewo and 90 km (56 mi) north-east of the regional capital Olsztyn. Before 1945 the area was part of Germany (East Prussia). The village has a population of 240.