Kopiec [ˈkɔpjɛt͡s] is a village in the administrative district of Gmina Kazanów, within Zwoleń County, Masovian Voivodeship, in east-central Poland. It lies approximately 6 kilometres (4 mi) north-west of Kazanów, 15 km (9 mi) south-west of Zwoleń, and 106 km (66 mi) south of Warsaw.