Koperno [kɔˈpɛrnɔ] is a village in the administrative district of Gmina Gubin, within Krosno Odrzańskie County, Lubusz Voivodeship, in western Poland, close to the German border. It lies approximately 8 kilometres (5 mi) south of Gubin, 31 km (19 mi) south-west of Krosno Odrzańskie, and 54 km (34 mi) west of Zielona Góra.