Radziki Duże is a village in the administrative district of Gmina Wąpielsk, within Rypin County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 4 kilometres (2 mi) north of Wąpielsk, 16 km (10 mi) north-west of Rypin, and 47 km (29 mi) east of Toruń.