Grodzisko [ɡrɔˈd͡ʑiskɔ] is a village in the administrative district of Gmina Biała Piska, within Pisz County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 13 kilometres (8 mi) south-west of Biała Piska, 16 km (10 mi) south-east of Pisz, and 102 km (63 mi) east of the regional capital Olsztyn.

The village is located on the prewar (East Prussian) - (Polish border).