Rosko ([ˈrɔskɔ]) is a village in the administrative district of Gmina Wieleń, within Czarnków-Trzcianka County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 11 kilometres (7 mi) east of Wieleń, 18 km (11 mi) west of Czarnków, and 66 km (41 mi) north-west of the regional capital Poznań.