Bieżyń [ˈbjɛʐɨɲ] is a village in the administrative district of Gmina Krzywiń, within Kościan County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 9 kilometres (6 mi) east of Krzywiń, 23 km (14 mi) south-east of Kościan, and 47 km (29 mi) south of the regional capital Poznań.