Teresin (Polish: [tɛˈrɛɕin]) is a village in the administrative district of Gmina Trzcianka, within Czarnków-Trzcianka County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 5 kilometres (3 mi) south-east of Trzcianka, 14 km (9 mi) north of Czarnków, and 74 km (46 mi) north of the regional capital Poznań.