Smerzyn [ˈsmɛʐɨn] is a village in the administrative district of Gmina Łabiszyn, within Żnin County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 4 kilometres (2 mi) south-west of Łabiszyn, 15 km (9 mi) north-east of Żnin, and 23 km (14 mi) south-west of Bydgoszcz.