Mieduniszki Wielkie [mjɛduˈniʂki ˈvjɛlkʲɛ] (German: Groß Medunischken, from 1938-45 Großmedien) is a village in the administrative district of Gmina Banie Mazurskie, within Gołdap County, Warmian-Masurian Voivodeship, in northern Poland, close to the border with the Kaliningrad Oblast of Russia.