Książ [kɕɔ̃ʂ] is a village in the administrative district of Gmina Strzelno, within Mogilno County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 6 kilometres (4 mi) east of Strzelno, 21 km (13 mi) east of Mogilno, 51 km (32 mi) south-west of Toruń, and 57 km (35 mi) south of Bydgoszcz.