Kopczyn [ˈkɔpt͡ʂɨn] is a village in the administrative district of Gmina Mogilno, within Mogilno County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 6 kilometres (4 mi) west of Mogilno and 51 km (32 mi) south of Bydgoszcz.