Radiówek [raˈdjuvɛk] is a village in the administrative district of Gmina Wiązowna, within Otwock County, Masovian Voivodeship, in east-central Poland. It lies approximately 2 kilometres (1 mi) south of Wiązowna, 5 km (3 mi) north-east of Otwock, and 23 km (14 mi) east of Warsaw.