Tarnówczyn [tarˈnuft͡ʂɨn] is a village in the administrative district of Gmina Krajenka, within Złotów County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 3 kilometres (2 mi) west of Krajenka, 8 km (5 mi) south-west of Złotów, and 102 km (63 mi) north of the regional capital Poznań.

Before 1772 the area was part of Kingdom of Poland, 1772-1945 Prussia and Germany. For more on its history, see Złotów County.