Rudzk Duży [ˈrut͡sk ˈduʐɨ] is a village in the administrative district of Gmina Piotrków Kujawski, within Radziejów County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 6 kilometres (4 mi) south-west of Piotrków Kujawski, 15 km (9 mi) south-west of Radziejów, and 59 km (37 mi) south of Toruń.