Koszanowo [kɔʂaˈnɔvɔ] is a village in the administrative district of Gmina Śmigiel, within Kościan County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 4 kilometres (2 mi) north-east of Śmigiel, 9 km (6 mi) south-west of Kościan, and 48 km (30 mi) south-west of the regional capital Poznań.