Hamrzysko [xamˈʐɨskɔ] is a village in the administrative district of Gmina Wieleń, within Czarnków-Trzcianka County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 15 kilometres (9 mi) south-east of Wieleń, 16 km (10 mi) south-west of Czarnków, and 61 km (38 mi) north-west of the regional capital Poznań.