Bieślin [ˈbjɛɕlin] is a village in the administrative district of Gmina Trzemeszno, within Gniezno County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 6 kilometres (4 mi) south of Trzemeszno, 18 km (11 mi) east of Gniezno, and 65 km (40 mi) east of the regional capital Poznań.