Kazin is a village in the administrative district of Gmina Nakło nad Notecią, within Nakło County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 10 kilometres (6 mi) north-east of Nakło nad Notecią and 20 km (12 mi) west of Bydgoszcz.
The village has a population of 230.