Mrozowo [mrɔˈzɔvɔ] is a village in the administrative district of Gmina Sadki, within Nakło County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 5 kilometres (3 mi) west of Sadki, 15 km (9 mi) west of Nakło nad Notecią, and 42 km (26 mi) west of Bydgoszcz.