Teresin (Polish pronunciation: [tɛˈrɛɕin]) is a village in the administrative district of Gmina Sicienko, within Bydgoszcz County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies 5 kilometres (3 mi) west of Sicienko and 21 km (13 mi) north-west of Bydgoszcz.