Grodzisko [ɡrɔˈd͡ʑiskɔ] 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. It lies approximately 5 kilometres (3 mi) south of Banie Mazurskie, 23 km (14 mi) south-west of Gołdap, and 110 km (68 mi) north-east of the regional capital Olsztyn.