Koźmin [ˈkɔʑmin], German Koschmin, is a village in the administrative district of Gmina Obrzycko, within Szamotuły County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 5 kilometres (3 mi) south-west of Obrzycko, 13 km (8 mi) north-west of Szamotuły, and 44 km (27 mi) north-west of the regional capital Poznań.