Ciężkowo [t͡ɕɛ̃ʂˈkɔvɔ] is a village in the administrative district of Gmina Szubin, within Nakło County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 10 kilometres (6 mi) south-west of Szubin, 22 km (14 mi) south of Nakło nad Notecią, and 30 km (19 mi) south-west of Bydgoszcz.