Radysy [raˈdɨsɨ] (German: Radishöh) is a village in the administrative district of Gmina Biała Piska, within Pisz County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 4 kilometres (2 mi) south-west of Biała Piska, 16 km (10 mi) east of Pisz, and 104 km (65 mi) east of the regional capital Olsztyn.

The village has a population of 160.