Kopalina [kɔpaˈlina] is a village in the administrative district of Gmina Sośnie, within Ostrów Wielkopolski County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 5 kilometres (3 mi) south-west of Sośnie, 26 km (16 mi) south of Ostrów Wielkopolski, and 117 km (73 mi) south-east of the regional capital Poznań.