Folsztyn [ˈfɔlʂtɨn] is a village in the administrative district of Gmina Wieleń, within Czarnków-Trzcianka County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 7 kilometres (4 mi) east of Wieleń, 21 km (13 mi) west of Czarnków, and 71 km (44 mi) north-west of the regional capital Poznań.