Koza Wielka [ˈkɔza ˈvjɛlka] is a village in the administrative district of Gmina Perzów, within Kępno County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 4 kilometres (2 mi) west of Perzów, 16 km (10 mi) west of Kępno, and 137 km (85 mi) south-east of the regional capital Poznań.